Yi Caltech Soliton frequency comb at microwave rates in a high-Q silica micro-resonator X. An ultra-high-quality magnesium fluoride disk resonator. A patent is is pending for the tuning method as well. Researchers hope to launch spacecraft to hunt for direct evidence of mysterious dark energy, the force thought to be responsible for the universe's accelerating expansion. According to this idea, interstellar spacecraft could be powered solely by Mach effects, the transient variations in the rest masses of objects that are accelerating and undergoing internal energy changes.
Soft, pancake-shaped robotic spacecraft could improve the ability of future missions to extract water and other resources from asteroids, according to this concept. The plane of symmetry between those two portions, or a surface intersecting that plane, does not to a first-order approximation undergo any longitudinal deformation. The initial results of the studied are now published in New phase matching method in micro resonators for wide-range efficient nonlinear frequency conversion October 31st, 2013 A wide-range efficient method for optical second harmonic generation based on a whispering gallery mode resonator made from crystalline beta barium borate has been reported. Selections of proposals are expected to be announced in December 2013. To achieve a frequency stability comparable to Fabry-Pérot reference cavities, especially in practical devices, the problem of mechanical instability must be addressed. This idea explores the possibility of manufacturing heat shields from asteroid material in space — an advance that would allow the low-cost capture of space resources into Earth orbit. Scientific American maintains a strict policy of editorial independence in reporting developments in science to our readers.
Volume: 34, Pages: 878-880 2009. These are just two of the five ideas that originated at Jet Propulsion Laboratory that are advancing for a new round of research funded by the agency. This idea explores the possibility of using a high-powered laser to study the composition of asteroids, comets, moons and planets from orbit. A, Volume: 76, Article Number: 053828 2007. Successful implementation would make possible a small and robust frequency reference for use in portable and practical devices in non-laboratory environments. This concept presents another possible way to achieve fusion-powered spaceflight.
Gaeta Columbia University Chip-Based Optical Frequency Combs I. Workshop Overview: The goal of this workshop is to formulate space applications and mission concepts enabled by optical frequency comb technology and to identify high priority technology challenges and gaps that need to be addressed to implement these missions. For many applications, frequency stability in the resonator is critical. Ertmer, et al, Experimental Astronomy, Volume: 23 Pages: 611-649 2009. This idea would use powerful lasers to illuminate solar panels on voyaging spacecraft, allowing these probes' ion-propulsion systems to be much lighter and more efficient and enabling the vehicles to travel much faster. Kellogg, Lute Maleki, Optics Letters, Vol.
This feature is highly desirable in a wide range of applications, including frequency metrology, spectroscopy, sensing, and ultra-low phase noise microwave and terahertz wave generation. Volume: 34, Pages: 713-715, 2009. Newbury National Institute of Standards and Technology Applications of Frequency Combs M. Colors indicate the magnitude of radial deformation. Selections of proposals are expected to be announced in January 2014.
The same phenomenology occurs when a resonator is bent. The publication will remain free to readers and will not erect paywalls. Workshop Overview: Approaching the ultimate quantum-mechanics-limited sensitivities in space communication and sensing remote or in-situ holds the potential to significantly improve our scientific capabilities in future space missions. The inner and outer radii are 2 and 5mm, respectively, and the thickness of this magnesium fluoride disk is 0. Dehmelt and Nan Yu, Proc.
The recognition caught the attention of French producers, who cast her in Rage 2003. Old tricks for new applications December 3rd, 2013 Stellar intensity interferometer is proposed for observation of exoplanets and other dark space objects. This project envisions an innovative way to potentially make feasible. Arkin and his team aim to use bioengineered Earth microbes to help grow crops on the Red Planet. Known for her success in art house films, Yu also starred in commercial films. The Turbolift system would induce for voyaging astronauts by accelerating them in a linear fashion back and forth , rather than by rotating them around a central point. Finite-element method simulation of the radial deformation field for a coaxially clamped disk resonator.
We have developed a method to engineer dispersion of crystalline resonators for the first time. Theoretical analysis indicates that the stress and strain fields are also null in this neutral plane. The mode frequencies of such a resonator can be fine-tuned by changing the shape of the belt. A key challenge is therefore to design clever mounting architectures capable of reducing or eliminating environmental fluctuations of a mechanical nature. The study addresses a novel aspect of stellar intensity interferometry, namely, the possibility to observe and characterize dark objects using distortions they impart on spatial coherence of thermal light sources. This balloon-based robotic exploration system would cruise through Venus' atmosphere at both high and low altitudes. Tinto, General Relativity And Gravitation, V.
Kerr Frequency Combs: from Laboratory to Space S. Ilchenko, Nan Yu, and Lute Maleki, Journal of The Optical Society Of America B-Optical Physics Volume: 24, Pages: 2988-2997 2007. Kellogg, and Lute Maleki, J. This program would bring together a diverse group of technical experts in optical frequency comb technology, space application specialists, and potential customers in the areas of astronomy and astrophysics, navigation, laser interferometry, earth and planetary science, and instrumentation development. She subsequently starred in three more films with Wang Quan'an. The most important requirement is that the rim, or lateral surface, of the disk must be free because any mechanical contact with that surface would preclude the propagation of whispering-gallery modes. This material may not be published, broadcast, rewritten or redistributed.