Title of Invention: DUAL WAVELENGTH LASER TREATMENT DEVICE Abstract: Embodiments of the invention include a compact, lightweight, hand-held laser treatment device that combines the emissions of two separate laser energy sources into a common optical pathway for improved therapeutic effect. In some embodiments, the device includes a housing having separate first and second laser sources disposed within the interior thereof. In some embodiments, the laser energy emissions from the two internal laser sources can be individually or concurrently transmitted to a delivery tip of the device via a laser transmission path also defined within the interior of the housing. In some embodiments, the structural and functional features of the first and second laser sources, in concert with the unique architecture of the laser transmission path, can be configured to provide efficacy and efficiency in the operation of the device within the spatial constraints of the lightweight, hand-held housing thereof. Detailed Description: CROSS-REFERENCE TO RELATED APPLICATIONS This application is a divisional application of U.S. application Ser. No. 14/587,955 entitled “Dual Wavelength Laser Treatment Device”, filed Dec. 31, 2014, which claims the benefit and priority of U.S. Provisional Application No. 61/922,581 entitled “Dual Wavelength Laser Treatment Device”, filed on Dec. 31, 2013, the entire contents of which are incorporated herein by reference. BACKGROUND OF THE INVENTION 1. Field of the Invention Some embodiments of the invention relate generally to medical laser systems. Some embodiments relate to a compact and lightweight hand-held laser treatment device that combines the emissions of two or more separate laser energy sources into a common optical pathway for improved therapeutic effect. 2. Description of Art Lasers find application in a variety of medical and dental treatment procedures, with some of the most common operations involving the cutting, ablation, disinfection or other treatment of tissue. Depending on the particular wavelength, output power, and pulse width of the laser emission, as well as the absorptivity of the target tissue, varying biological materials from soft tissue such as muscles and skin, to hard tissue such as teeth and bones, can be cut and ablated. The laser systems typically have output power levels up to the tens of watts, although systems with output power levels in the 10 milliwatt range have microbiocidal, tissue biostimulation, low-level light therapy, and other non-tissue-destructive applications. A conventional laser system generally includes three primary components: a laser medium that generates the laser light, a power supply that delivers energy to the laser medium in the form needed to excite the same to emit coherent light, and an optical cavity or resonator that concentrates the light to stimulate the emission of laser radiation. Laser emissions can include ultraviolet wavelengths, visible light wavelengths, and infrared wavelengths, depending on the type of laser medium utilized (e.g., gas, chemical, dye, metal vapor, solid state, semiconductor, or others.) For surgical laser applications requiring high output power, the lasers are often solid state types where the laser medium is comprised of a solid host crystalline or glass structurewith an incorporated dopant material. In hard and soft tissue ablation applications, neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers with an emission wavelength of 1.064 μm, erbium-doped yttrium aluminum garnet (Er:YAG) lasers with an emission wavelength of 2.94 μm, and holmium-doped yttrium aluminum garnet (Ho:YAG) lasers are frequently utilized. Furthermore, erbium chromium doped yttrium, scandium, gallium garnet (Er, Cr:YSGG) lasers have been utilized successfully in medical treatment applications. Other laser mediums utilizing gasses such as carbon dioxide, xenon, argon, excimer laser gases (such as noble gas halides), and copper vapor lasers have also been used with success. During operation, an optical pump (e.g., a flash lamp) generates short-duration, intense, incoherent, full spectrum light to excite a laser medium (e.g., a doped solid host structure) to a population inversion state where atoms of an elevated energy state exceed those ofa lower energy state with. In place of flash lamps, electrically powered diode lasers can also be utilized. The laser medium is disposed between two or more reflective mirrors that define an optical resonator. With each reflection off of the mirrors, the light is further stimulated by the optical pump, resulting in light amplification. One of the mirrors is a partial reflector, which allows some of the amplified light to exit the cavity as the laser emission, and can also bereferred to as an output coupler. The laser output is typically pulsed by such techniques as Q-switching, which can result in substantially higher instantaneous laser power output, although continuous or quasi-continuous operation is also possible. Alternatively, a laser diode can also be utilized in medical treatment applications. Similar in operation to light emitting diodes, the laser diode is comprised of a p layer and an n layer, with an active, photon emitting layer in between. Like the solid state laser, there are one or more reflectors as well as an output coupler, which are incorporated into the semiconductor assembly, with electrical current providing the stimulus to reach the population inversion state. A conventional laser apparatus suitable for surgical applications generally includes the aforementioned laser energy source coupled to a handpiece that can be manually operated by the practitioner. Due to the high power requirements and attendant safety concerns, the laser energy source is oftentimes located away from the operator and the patient. An extended waveguide, that is, a fiber optic cable, connects the laser energy source to the handpiece. In a basic implementation, the handpiece includes a tip that is in optical communication with the waveguide and the laser energy source. The tip directs the emitted laser on to a target tissue site, and varying shape configurations can yield different output profiles, including simple circular patterns. The laser emission can be directed at any angle that maximizes operator flexibility and comfort in accessing the target tissue site. The optical pathway can be offset from the connecting cable/handpiece axis using different reflector arrangements. As briefly mentioned above, cutting and ablative efficacy largely depends upon the emitted wavelength and the absorptivity of that particular wavelength by the target tissue. Further, the intensity of the emission, along with the duration of the pulse, must be set to ensure that the tissue does not boil or vaporize (which can lead to greater injury and hemorrhaging). Following irradiation with a laser emission, the ablated tissue region is surrounded by a carbonization zone, a zone loosened by vacuoles, a coagulation zone, and a reversibly thermally damaged zone. The formation of the coagulation zone and the resultant hemostasis is advantageous in that tissue can be cut without bleeding. In order to achieve the best results with the least amount of damage to the surrounding tissue, the laser emission parameters must be optimized for each clinical application. Most laser treatment apparatuses are therefore dedicated to one operation, though supplemental features that do not involve laser emissions are also known. For example, a water supply line and an air supply line have been incorporated into the handpiece to deliver water and air to the target tissue area. This cools the target tissue and removes debris. To further aid in the removal of debris, vacuum lines have also been incorporated. The use of water and air to improve efficacy has not been limited to these obj ectives, and an alternative cutting mechanism by which laser energy is directed to a distribution of atomized fluid particles located in a volume of space away from the targeted tissue site has been developed and disclosed in, for example, U.S. Pat. No. 5,741,247. The laser energy is understood to interact with the atomized fluid particles causing the same to expand and impart mechanical cutting forces onto the targetsurface. To the extent multiple laser emissions are incorporated into a single laser system, existing systems such as those disclosed in U.S. Pat. No. 5,139,494 illustrate the use of a single laser catheter to the target tissue that is engaged to multiple sources of laser energy, each of which has a different therapeutic effect. The laser sources are separately activated, and while concurrent operation is indicated, each of the respective laser energy sources is configured to operate as an independent unit to known effect. Alternatively, some others have contemplatedthe adjustment of the laser source to enable the selective emission of laser energy at different wavelengths and durations. Accordingly, there is a need in the art for an improved handheld laser treatment device with dual laser energy sources incorporated into the handpiece. There is also a need in the art for concurrent laser emissions in order to achieve enhanced treatment capabilities that exceed those of dual laser sources that operate independently. It would also be desirable for those laser emissions to be delivered along a common optical pathway. SUMMARY OF THE INVENTION In accordance with some embodiments, there is provided a handheld laser treatment device that combines the emissions of two separate laser energy sources into a common optical pathway for improved therapeutic effect. More particularly, the device comprises a housing having separate first and second laser sources disposed within the interior thereof. Laser energy emissions from the two internal laser sources can be individually or concurrently transmitted to a delivery tip of the device via a laser transmission path also defined within the interior of the housing. In some embodiments, the structural and functional features of the first and second laser sources, in concert with the unique architecture of the laser transmission path, is configured to provide efficacy and efficiency in the operation of the device within the spatial constraints of the lightweight, handheld housing thereof. In some embodiments, the laser transmission path is segregated into multiple segments and has various ancillary transmission components integrated therein. These components include first and second bending mirrors, a collimating lens, a focusing lens, and, optionally, a coupling fiber and a focusing mirror. In some embodiments, the lengths of the various segments of the transmission path in concert with the angular orientations and spatial relationships of such segments and the transmission components integrated therein relative to each other and to the first and second laser sources is specifically selected within the device to accomplish the aforementioned objectives, as will be described in more detail below. Some embodiments of the invention include a compact, lightweight, hand-held laser treatment device comprising a housing and a first laser source disposed within the housing that is configured to facilitate the emission of a first laser beam having a first beam characteristic. In some embodiments, the laser treatment device also includes a second laser source which is at least partially disposed within the housing and is configured to facilitate the emission of a second laser beam having a second beam characteristic differing from the first beam characteristic. In some embodiments, the laser treatment device also comprises an elongate delivery tip defining a delivery axis and protruding from the housing, and a laser transmission path defined within the housing and configured to facilitate the transmission of one or both of the first and second laser beams to the delivery tip. The laser transmission path can comprise a plurality of discrete segments which are of prescribed lengths and a plurality of ancillary transmission components which are integrated into the segments at prescribed spatial relationships and angular orientations relative to each other and to the first and second laser sources. Further, the lengths of the segments, angular orientations, and spatial relationships of the ancillary transmission components relative to each other and to each of the first and second laser sources may be configured and arranged to enable the first and second beam characteristics of the first and second laser beams to be combined within at least one of the segments of thelaser transmission paths forming coincident transmission of the first and second laser beams to the delivery tip. In some embodiments of the invention, the treatment device includes a first laser source that comprises a high peak power, flash lamp pumped, solid state laser, and the second laser source comprises at least one of a high average power diode laser and a diode pumped fiberlaser. In some further embodiments, the treatment device comprises a first laser source that is configured to facilitate the emission of the first laser beam along a first laser source axis, and the second laser source is configured to facilitate the emission of the second laser beam along a second laser source axis. Further, the laser transmission path comprises a first segment defining a first axis which is coaxially aligned with the first laser source axis, a second segment defining a second axis which extends at a prescribed angle relative to the first axis, and a third segment defining a third axis which is coaxially aligned with the second laser source axis and extends at a prescribed angle relative to the second axis. In some embodiments of the invention, the treatment device includes transmission components integrated into the laser transmission path that include a first bending mirror disposed between the first and second segments and is configured to facilitate directing the first laser beam from the first axis to and along the second axis. Further, a second bending mirror is disposed between the second and third segments and is configured to facilitate directing the first laser beam from the second axis to and along the third axis. Further, a focusing lens is disposed within the third segment along the third axis and is configured to focus the one or both of thefirst and second lasers beams toward the delivery tip. In some embodiments, the treatment device further comprises a collimating lens disposed along the second laser source axis between the second laser source and the second bending mirror. Some embodiments include the first laser source separated from the firstbending mirror by a prescribed first distance along the first axis. Further, the first and second bending mirrors are separated from each other by a prescribed second distance along the second axis, and the second bending mirror is separated from the focusing lens by a prescribed third distance along a portion of the third axis, and the second laser source is separated from the focusing lens by a prescribed fourth distance which is less than the total of the first, second and third distances. In some embodiments, the total of the first, second, and third distances is 25 mm or more. In some embodiments, the delivery tip defines opposed input and output ends, with the delivery axis thereof being coaxially aligned with the third axis of the third segment, and the focusing lens is configured to focus one or both of the first and second laser beams onto the input end of the delivery tip. In some embodiments of the invention, the transmission components are integrated into the laser transmission path and further include an elongate coupling fiber definingopposed input and output ends and disposed within the third segment along the third axis. The focusing lens is configured to focus one or both of the first and second lasers beams onto the input end of the coupling fiber, and a focusing mirror is disposed within the third segment along the third axis and is configured to facilitate the focusing of one or both of the first and second laser beams from the third axis to the delivery axis of the delivery tip. In some furtherembodiments, the delivery axis of the delivery tip extends at an angle of about 90° relative to the third axis. In some embodiments of the invention, the treatment device comprises a coupling fiber that includes a bend comprising an arcuate contour, where a portion of the coupling fiber defining the output end extends at a prescribed angle relative to a linear portion of the third axis between the second bending minor and the focusing lens. Further, the delivery axis of the delivery tip extends at an angle of between about 90° to about 180° relative to the linear portion of the third axis. Some embodiments of the invention include a compact, lightweight, hand-held laser treatment device comprising a first laser source configured to facilitate the emission of a first laser beam having a first beam characteristic, and a second laser source configured to facilitate the emission of a second laser beam having a second beam characteristic differing from the first beam characteristic. Further, the laser transmission path is configured to facilitate the transmission of one or both of the first and second laser beams from the treatment device. Furthermore, the laser transmission path comprises a plurality of discrete segments which are of prescribed lengths, and a plurality of ancillary transmission components which are integratedinto the segments at prescribed spatial relationships and angular orientations relative to eachother and to the first and second laser sources. Moreover, the lengths of the segments, angular orientations, and spatial relationships of the components relative to each other and to each of the first and second laser sources are configured and arranged to enable the first and second beam characteristics of the first and second laser beams to be combined within one of the segments of the laser transmission path forming coincident transmission of the first and second laser beams from the treatment device. In some embodiments of the invention, the treatment device includes transmission components integrated into the laser transmission path that include a first bending mirror disposed between the first and second segments and configured to facilitate directing the first laser beam from the first axis to and along the second axis. Further, a second bending mirror is disposed between the second and third segments and is configured to facilitate directing the first laser beam from the second axis to and along the third axis. Further, a focusing lens is disposed within the third segment along the third axis and is configured to focus the one or both of thefirst and second lasers beams along the third axis within the third segment. Some embodiments of the invention include a compact, lightweight, hand-held laser treatment device comprising an elongate housing, a delivery tip protruding from the housing, and a first laser source including a first laser source output disposed within the housing. The first laser source is configured to generate a first laser emission defined by a first beam characteristic, and a second laser source including a second laser source output is disposedwithin the housing. The second laser source configured to generate a second laser emission defined by a second beam characteristic different from the first beam characteristic. Further, a first transmission path is defined between the first laser source output and the delivery tip. The first transmission path has a first predetermined distance, and a second transmission path defined between the second laser source output and the delivery tip. The second transmission path has a second predetermined distance different from the first predetermined distance, and at least a portion of the first transmission path and the second transmission path are coaxial. The first and second laser sources can be operated in concert to generate combined laser emissions that synergistically enhance tissue treatment. Furthermore, the efficacy of treatment with the dual laser emissions can be increased with the addition of a water spray that, for ablative forms of treatment, reduces ablation width, increases ablation depth, and reduces charring that harms the surrounding tissue. Synergistic bactericidal, bio-stimulation or wound healing, and pain reduction benefits from the concurrent operation of the two laser sources are also contemplated. By way of example, in accordance with some embodiments of the invention, one of the laser sources can primarily be used for ablation while having relatively limited bactericidal effects that weaken, but not entirely kill the bacteria. The second laser source, after the first laser source is pulsed, can generate another emission that kills the weakened bacteria, even though such emission is not in and of itself capable of killing normal bacterial. Furthermore, the effects of low level laser therapy with one laser source in bio-stimulation applications can be increased with another laser source that generates pressure waveswithin the tissue. Pain reduction is also possible, in which the first laser source penetrates tissue and stuns nerve endings while the second laser source ablates tissue, thus eliminating painsignals that would otherwise result from treatment with the second laser source. A control system that selectively governs the emissions from the first and second laser sources can accomplish the aforementioned functions. Some embodiments of the invention include a method for laser treatment of a target tissue site comprising applying a first laser emission defined by a first beam characteristic to the target tissue site, where the first laser emission alone has a first treatment effect on the target tissue site. The method may also include applying at least a second laser emission defined by a second beam characteristic to the target tissue site, where the second laser emission is applied within a predetermined time period of applying the first laser emission during which the target tissue site is subjected to the first treatment effect from the first laser emission. Further, the first laser emission and the second laser emission may comprise an additive treatment effect greater than the first treatment effect alone and the second treatment effect alone. Some embodiments of the method include applying a first laser emission defined by a first beam characteristic to the target tissue site, and the first laser emission alone having a first treatment effect on the target tissue site. Some embodiments include applying at least a second laser emission defined by a second beam characteristic to the target tissue site, where the second beam characteristic is different from the first beam characteristic and has a second treatment effect different from the first treatment effect. Further, the second laser emission is applied within a predetermined time period of applying the second laser emission during which the target tissue site is subject to the first treatment effect from the first laser emission. Moreover, the first laser emission and the second laser emission may comprise a synergistic treatment effect different from both the first treatment effect and the second treatment effect independently with the first treatment effect and the second treatment effect being non-linearly enhanced by each other. In some embodiments of the invention, the first laser emission and the second laser emission are combined and emitted from a single output of a treatment device. Some embodiments of the method include applying to the target tissue a third laser emission defined by a third beam characteristic and a third treatment effect. Further, in some embodiments, the first laser emission, the second laser emission, and the third laser emission have another synergistic effect different from the first treatment effect, the second treatment effect, and the third treatment effect independently. In some embodiments of the invention, the first laser emission is applied to the target tissue site in pulses, and the second laser emission is applied to the target tissue site for a duration longer than the pulses of the first laser emission. In some embodiments, the first treatment effect comprises a pressure wave that weakens any bacteria on the target tissue site thatincludes a biofilm, where the bacteria are weakened by disruption of biofilm and bacterial membranes in response to the pressure wave. Further, the second treatment effect is induced by application infrared or ultraviolet radiation at the levels below the bacteria vitality threshold levelfor the applied radiation. Further, the synergistic treatment effect is at least one of neutralization,killing of the weakened bacteria, and reduction of inflammatory tissue conditions. In some embodiments of the method, the first laser emission is generated from a solid state laser source comprising a high peak power flash lamp pumped solid state laser source, and the second laser emission is generated from a laser source comprising a diode laser source. In some embodiments of the method, first beam characteristic and the second beam characteristic each comprise output powers, where the output power corresponding to the second beam characteristic being greater than the output power corresponding to the first beam characteristic. In some embodiments, the first laser emission and the second laser emission are applied to the target tissue site in pulses. In some further embodiments, the first treatment effect comprises a first ablation depth. In some further embodiments, the second treatment effect comprises a second ablation depth different from the first ablation depth, and the synergistic treatment effect comprises a third ablation depth greater than either one of the first ablation depth and the second ablation depth. In some other embodiments of the method, the second ablation depth is characterized by no ablation. Some embodiments of the method include applying a fluid to the target tissue site. In some embodiments, the first treatment effect comprises application of a first level bio-stimulative energy to surrounding tissue of the target tissue site, and the second treatment effect comprises a treatment procedure not directly specified for bio-stimulation of the treatment site, where the synergistic treatment effect comprises a result of synergetic action of two treatment effects. In some embodiments of the method, the second treatment effect is at least one of surgical cutting, removal of diseased tissue, and reduction of bacteria at the treatment site. Further, some embodiments of the method include a synergistic treatment effect that is at least one of a reduction of inflammatory effect, wound healing and tissue re-generation. In some embodiments, the first beam characteristic and the second beam characteristic comprise output power, where the output power corresponding to the first beam characteristic and the output power corresponding to the second beam characteristic are atablative levels. In some other embodiments of the method, the first beam characteristic and the second beam characteristic include output power, where the output power corresponding to the first beam characteristic and the output power corresponding to the second beam characteristic are at sub-ablative levels. Some embodiments of the method for pain-free laser ablation of a target tissue site comprises applying a first laser emission to the target tissue site, where the first laser emission has a first treatment effect comprising analgesia inducing stunning of nerve endings. Further, the method includes applying a second laser emission to the target tissue site following the applying the first laser emission to the target tissue site. The second laser emission has a second treatment effect comprising ablation of the target tissue site, where the stunned nerve endings block transmission of pain signals otherwise initiated in response to the application ofthe second laser emission to the target tissue site. In some embodiments of the method, stunned nerve endings comprise stunned nerve endings in an area adjacent, proximate to and/or surrounding the target tissue site. In some embodiments, the laser emission comprises a near infrared spectral wavelength. In some further embodiments, the first laser emission and the second laser emission are applied to the target tissue site in pulses. In some other embodiments of the method, the first laser emission and the second laser emission are combined and emitted from a single output of a treatment device. Some embodiments of the method for laser treatment of a target tissue site comprise applying to the target tissue site a first laser emission pulse having a first wavelength, where the first laser emission pulse generates a pressure wave disruptive of membranes of bacteria present on the target tissue site. The method also includes applying to the target tissue site a continuous second laser emission having a second wavelength different from the first wavelength, the continuous second laser emission neutralizing the bacteria weakened from the pressure wave generated by the first laser emission pulse, where the continuous second laser emission comprises an output power level that is lower than an output power level of the first laser emission pulse. In some embodiments, the first laser emission pulse has a range of 3 micrometers and is generated from a high peak power flash lamp pumped solid state laser source. Embodiments of the invention are best understood by reference to the following detailed description when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view of a hand held treatment device constructed in accordance with one embodiment of the invention; FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1; FIG. 3 is a schematic representation of the various internal components of the device shown in FIGS. 1 and 2, further illustrating several potential variants of the spatial relationships of such components relative to each other; FIG. 4 is a top view of a hand held treatment device constructed in accordance with another embodiment of the invention; FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 4; and FIG. 6 is a diagram illustrating the combined synergistic antibacterial effects of the hand held treatment device of some embodiments of the invention with a first laser source and a second laser source being pulsed across different stages of operation, and includes graphical representations of waveforms of the laser pulses, a water bubble size, pressure wave, water ionization and the effects on bacteria. DETAILED DESCRIPTION OF THE INVENTION Referring now to the drawings for purposes of illustrating the various embodiments of the invention, and not for purposes of limiting the same, FIGS. 1 and 2 depict a hand-held, dual wavelength treatment device or hand-piece 10 constructed in accordance with one embodiment of the invention. In some embodiments, the device 10 comprises an elongate housing 12 which, as most easily seen in FIG. 2, showing a cross-sectional view taken along line 2-2 of FIG. 1, defines three separate regions, including a main body region 14, a distal head region 16, and a neck region 18. The neck region 18 can form a transition between the main body region 14 and the distal head region 16. In the embodiment shown in FIG. 2, the neck region 18 comprises a generally arcuate contour or profile. As will be discussed in more detail below, this arcuate contour is selected to cause laser energy to be transmitted from the output end 17b of an elongate delivery fiber or tip 17 (which directs the laser energy to a target surface) along a delivery axis DA which is defined by the delivery tip 17 and extends at a prescribed angle relative to one of three segments of a laser transmission path itself defined within the housing 12. However, in an alternative embodiment, which will also be described in more detail below, the housing 12 can be configured such that the delivery axis for the laser energy extendsin coaxial alignment with one of the three segments of the laser transmission path. In some embodiments of the invention, the device 10 comprises a housing 12 that is hollow, with the main body region 14 being tubular, and having a generally circular cross-sectional configuration. As viewed from the perspective shown in FIG. 1, in some embodiments, the housing 12 comprise an overall length L. In some embodiments, the overall length L can be in the range of from about 50 mm to about 300 mm. Further, in some embodiments, the main body region 14 can comprise a width or diameter in the range of from about 8 mm to about 40 mm. However, in any embodiment, the size of the housing 12, and in particular the diameter of the main body region 14 can be selected so as to be comfortably graspable in the hand of a medical clinician or practitioner, and easily moved or manipulated in the course of providing various treatment protocols as will be described in more detail below. Therefore, in other embodiments, the overall length L can be less than about 50 mm or greater than about 300 mm, and/or the body region 14 can comprise a width or diameter in the range of from less than 8 mm, or greater than about 40 mm. Some embodiments of the invention include a plurality of laser sources coupled to the housing 12. For example, some embodiments of the invention include at least two laser sources coupled to the housing 12. In some embodiments of the invention, a first laser source 20 and a second laser source 22 can be coupled to the housing 12. In some embodiments, the device 10 can comprise a first laser source 20 that is disposed in its entirety within the interior of the main body region 14 of the housing 12. On the other hand, in some embodiments, only a portion of the second laser source 22, and in particular a delivery fiber 23 thereof, can extend into the interior of the main body region 14 of the housing 12. In this regard, in some embodiments, the remainder of the second laser source 22 can reside within a base unit (not shown) used in conjunction with the device 10. However, in accordance with a potential variant of the device 10, it is contemplated that, like the first laser source 20, in some embodiments, the entirety of the second laser 22 can reside within the interior of the main body region 14 of the housing 12. In some embodiments of the invention, the first laser source 20 comprises a high peak power, flash lamp pumped, solid state laser comprising an elongate flash lamp 24 and elongate laser rod 26 which can extend in a side-by-side relation to each other. More particularly, in some embodiments, the flash lamp 24 and laser rod 26 can extend along respective spaced and generally parallel axes (i.e., a flash lamp axis and a laser rod axis), with the laser rod 26 being located proximate the flash lamp 24. In this instance, the traditional modes of operation of flash lamp pumped lasers can enable laser energy to be transmitted from the flash lamp 24 into the laser rod 26. Some embodiments of the invention include operational parameters for the first laser source 20 that are in a wavelength range of about 300 nm to about 3000 nm working in a free running or Q-switched mode. Further, in some embodiments, the pulse repetition rate of the first laser source 20 can range from a single shot mode up to about 1000 Hz. Further, some embodiments include a first laser source 20 with pulse durations from about 10 nsec to about 1 msec. In some embodiments, the beam divergence of the first laser source 20 can range from about 0.5 mrad to about 30 mrad. Referring to the perspective view of FIG. 2, in some embodiments of the invention, the first laser source 20 further comprises an output coupler 28 disposed at one end of the laser rod 26 (i.e., the end disposed closest to the neck region 18 of the housing 12), and a reflector 30 disposed at the other end of the laser rod 26. Some embodiments of the invention also include an elongate flow tube or reflector 32 which accommodates portions of the flash lamp 24 and laser rod 26. In this regard, in accordance with known operational principles, the reflector 32 can facilitates transmission of laser energy from the flash lamp 24 to the laser rod 26. In some embodiments, the laser energy can then travel through the laser rod 26 to the aforementioned output coupler 28. In some embodiments of the invention, the second laser source 22 can comprise a high average power diode laser or diode pumped fiber laser. In some further embodiments, the operational parameters of the second laser source 22 can comprise a wavelength range of about 300 nm to about 3000 nm. Further, in some embodiments, the second laser source 22 can operate in a continuous or a quasi-continuous mode. In some embodiments, the second laser source 22 pulse can operate with a repetition rate from a single shot mode up to about 1000 Hz. In some embodiments, the second laser source 22 pulse can operate with pulse durations from about 1 μsec up to a continuous mode. In some further embodiments, the second laser source 22 pulse can operate with an average output power of from about 10 mW up to about 100 W. In some embodiments of the invention, the second laser source 22 pulse can operate with a beam divergence from about 0.5 mrad to about 0.5 rad. In some embodiments of the invention, as indicated above, whereas the flash lamp 24, laser rod 26, output coupler 28, and reflector 32 of the first laser source 20 each can reside within the interior of the main body region 14 of the housing 12, only the delivery fiber 23 of the second laser source 22 can extend into the interior of the main body region 14. In this regard, as also indicated above, in some embodiments, the remaining components of the second laser source 22 can reside within a base unit used in conjunction with the device 10. Further, the delivery fiber 23 can extend from the housing 12 to the base unit within a connector cable 56 between the device 10 and the base unit as will be described in more detail below. Some embodiments of the invention include the device 10 including a first laser source 20 that, when activated, can facilitate the emission of a laser beam having a first beam characteristic. Similarly, in some embodiments, the second laser source 22, when activated, can facilitate the emission of a laser beam having a second beam characteristic. As utilized herein, the term “beam characteristic” refers to any one or combination of emission and operational parameters, including, but not limited to, wavelength, divergence, beam diameter, output power, pulse duration (whether periodic or continuous), duty cycle, pulse frequency, and any other parameters that be adjusted to achieve different therapeutic effects. In this regard, it is also contemplated that the beam characteristics of laser beams generated by the first and second laser sources 20, 22 within the device 10 can differ from each other (i.e., at least one of the emission and operational parameters specified above will vary within the laser beams.) In some embodiments of the invention, the device 10 can comprise the aforementioned laser transmission path defined within the housing 12 that can be provided with a unique architecture that allows the two separate emissions of the first laser source 20 and the second laser source 22 to be combined for output from the single delivery tip 17. Referring to FIG. 3, illustrating a schematic representation of the various internal components of the device shown in FIGS. 1 and 2, further illustrating several potential variants of the spatial relationships of such components relative to each other, in some embodiments, the architecture of the transmission path further allows it to be accommodated within the interior of the hand-held housing 12, along with the entirety of the first laser source 20, and at least a portion of the second laser source 22. In some embodiments, upon reaching the delivery tip 17, laser energy can be transmitted along the delivery axis DA defined by the delivery tip 17, and subsequently to a treatment site. It will be recognized by those having ordinary skill in the art that beam divergence is generally the inverse of the wavelength. As indicated above, the first laser source 20 and the second laser source 22 can have substantially overlapping output wavelength ranges, but in accordance with various embodiments of the invention, they are not operated at exactly the same wavelength (although the embodiments as described herein do not preclude the laser sources 20, 22 from operating at the same wavelength, and in some alternative embodiments, the laser sources 20, 22 can operate at substantially the same wavelength). Accordingly, based on the differing output wavelengths alone, in some embodiments, beam divergence is likewise understood to differ between the first laser source 20 and the second laser source 22. Beam divergence also depends on the particulars of the laser energy source, and further variability is introduced because of the differing laser types. For example, in some embodiments, the first laser source 20 can comprise a solid state configuration, while the second laser source 22 can comprise a diode configuration. Thus, per the foregoing discussion of the two laser sources, the first laser source 20 can comprise a beam divergence of from about 0.5 mrad to about 30 mrad, while the second laser source 22 can comprise a beam divergence of from about 0.5 mrad to 0.5 rad (i.e., the solid state laser has a lower divergence than the diode laser). In accordance with some embodiments of the invention, laser beams with dissimilar beam characteristics characterized by different wavelengths and divergences can be effectively combined into a single final transmission path. For example, for a given single focusing element having a predetermined focal length, in some embodiments, this can be achieved by varying the respective distances between the emission outputs of the first and second laser sources 20, 22 and the focusing element (which will be described in more detail below). In some embodiments, a longer distance can be utilized for the first laser source 20, and for accommodating an increased distance within the spatial constraints of the hand-held housing 12. For example, some embodiments of the invention can include a transmission path that has a generally Z-shaped configuration in the device 10. Referring to the perspective views shown in FIGS. 2 and 3, in some embodiments, the Z- shaped laser transmission path can include a linearly configured first portion or segment that defines a first axis AX1 coaxially aligned with the laser rod axis (which can also be referred to as the first laser source axis). Further, in some embodiments, the laser transmission path also includes a linearly configured second segment S2 which can define a second axis AX2 extending at a prescribed angle relative to the first axis AX1 of the first segment. In some embodiments, in addition to the first and second segments, the laser transmission path can include a third segment S3 defining a third axis AX3, at least a portion of which can extend linearly at a prescribed angle relative to the second axis AX2 of the second segment. As will be described in more detail below, in some embodiments of the invention, a portion of the third axis AX3 of the third segment S3 of the laser transmission path can include a linear configuration that can extend in a spaced, substantially parallel relation to the first axis of the first segment S1 thereof, and in a coaxial alignment with a second laser source axis of the second laser source 22 defined by at least a portion of the delivery fiber 23 (which extends into the interior of the main body region14 of the housing 12.) Some embodiments of the invention include a device 10 that is functional in several different operational modes. In some embodiments, the device 10 can include an operational mode where only the first laser source 20 is activated, resulting in the laser beam traveling along the first, second and third axes AX1, AX2, AX3 defined by the first, second and third segments of the laser transmission path, respectively, to the delivery tip 17. In a further embodiments of the invention, a second operational mode can include only the second laser source 22 activated, resulting in the laser beam traveling along the second laser source axis and thereafter the third axis AX3 of the third segment S3 of the laser transmission path to the delivery tip 17. In some other embodiments of the invention, the device 10 can include a third mode of operation, where the first and second laser sources 20, 22 are simultaneously activated, resulting in the laser beams being combined along the third axis AX3 of the third segment S3 of the laser transmission path prior to reaching the delivery tip 17. In some further embodiments of the invention, the first laser source 20 and the output coupler 28 can be configured to facilitate the transmission of a laser beam from the laser rod 26 of the first laser source 20 in a direction along the first laser source axis into the first segment S1 of the laser transmission path and along the first axis AX1 thereof which is coaxially aligned with the first laser source axis. In some embodiments, the device 10 can include a first bending mirror 34 which can be integrated into the laser transmission path by locating at that end of the first axis AX1 of the first segment S1 of the laser transmission path disposed furthest from the output coupler 28. In some embodiments, the first bending mirror 34 can be configured to direct a laser beam emission from the first laser source 20 (shown as being emitted from the laser rod 26 in FIG. 3) that can travel along the first laser source axis and through the first segment S1 of the laser transmission path along the first axis AX1 and into and through the second segment S2 of the laser transmission path along the second axis AX2. As illustrated in FIG. 3, in some embodiments, a prescribed distance D1 generally corresponding to the length of the first segmentS1 of the laser transmission path can separate the output coupler 28 of the first laser source 20 from the first bending mirror 34. Further, as illustrated with arrows, in some embodiments, a prescribed angle A1 can be defined between the first and second axes AX1, AX2 of the first and second segments of the laser transmission path. Some embodiments of the invention include a device 10 that further comprises a second bending mirror 36. Referring to FIG. 3, in some embodiments, a second bending mirror 36 can be integrated into the laser transmission path and located at that end of the second axis AX2 of the second segment S2 (which is opposite the first bending mirror 34). In some embodiments, the second bending mirror 36 can be configured to direct a laser beam emission from the first laser source 20 which travels along the second axis AX2 of the second segment S2 of the laser transmission path into the third segment S3 of the laser transmission path and along the third axis AX3 thereof toward the delivery tip 17. As also seen in FIG. 3, a prescribed distance D2 generally corresponding to the length of the second segment S2 of the laser transmission path separates the first and second bending mirrors 34, 36 from each other. Further, a prescribed angle A2 is defined between the second axis AX2 of the second segment S2 of the laser transmission path and a linearly configured portion of the third axis AX3 of the third segment S3 thereof. Moreover, this third segment S3 generally extends in a spaced, substantially parallel relation to the first axis AX1 defined by the first segment S1. In some embodiments of the invention, the device 10 can comprise a second laser source 22 that is configured to facilitate the transmission of a laser beam along the second laser source axis which is coaxially aligned with the linearly configured portion of the third axis AX3 defined by the third segment S3 of the laser transmission path. Along these lines, as seen in FIGS. 2 and 3, in some embodiments, the device 10 can further comprise a collimating lens 38 which is interposed between the second laser source 22 and the second bending mirror 36 along the second laser source axis. In some embodiments, the collimating lens 38 functions in accordance with traditional principles well known in the art, effectively collimating and/or narrowing the laser beam generated by the second laser source 22, and facilitating transmission of the laser beam along the second laser source axis to and through the second bending mirror 36, and into the third segment S3 of the laser transmission path along the third axis AX3 thereof. In some embodiments, a prescribed distance D4 separates the collimating lens 38 from thesecond laser source 22. In some embodiments, this distance D4 is based on, and can beselectively varied in accordance with, the particular characteristics (e.g., beam divergence and wavelength) of the emission from the delivery fiber 23 of the second laser source 22. Some embodiments of the invention include a device 10 that further comprises a focusing lens 40, an elongate coupling fiber 42, and a focusing minor 44 which are also integrated into the laser transmission path, and more particularly within the third segment S3 thereof. Further, in some embodiments, the focusing lens 40, the coupling fiber 42 and the focusing mirror 44 are arranged in the third segment S3 of the transmission path along the third axis AX3 thereof in series. Further, in some embodiments, the focusing lens 40 can be positioned between the second bending mirror 36 and the coupling fiber 42, and the coupling fiber 42 can be positioned between the focusing lens 40 and the focusing mirror 44. In some embodiments, as seen in FIGS. 2 and 3, the coupling fiber 42 has a slight arcuate contour imparted thereto which roughly coincides to that of the neck region 18 of the housing 12. In some embodiments of the invention, the device 10 can include a coupling fiber input 43 thereof that is disposed at that end of the coupling fiber 42 directed toward the focusing lens 40. Further,
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