 “product tight,” for purposes of these environmental regulations, is generally defined as impervious to the substance that is contained to prevent seepage of the substance from the primary containment unit. Moreover, for a tank to be product tight, the tank cannot be subject to physical or chemical deterioration by the contained substance over the useful life of the tank. Further, these regulations require that owners or operators of an underground storage tank system with a single-walled component located within 1,000 feet of a public drinking water well implement a program of enhanced leak detection or monitoring.
One known method of monitoring leaks disclosed in U.S. Pat. No. 6,489,894, entitled “Leak Detection Device for Double Wall Pipeline Systems and Container Systems,” uses a leak detector with a vacuum pump including a pressure-dependent switch and an alarm device to detect leaks in a double-walled pipeline or container system. The disclosed leak detector is adapted to simultaneously monitor several containers connected to a collecting main and a vacuum pump by vacuum lines. Each monitored container incorporates a vacuum connector or valve to fluidly connect a control space to the leak detector. Each vacuum line has a first liquid lock arranged at the vacuum connector to block liquid that has leaked into the vacuum lines from a leaky container from penetrating into the control spaces of the leak-free containers. A second liquid lock is arranged in the collecting main to prevent liquid from entering the vacuum pump. While this method can detect leaks within the control space of a container, it is a mechanically complex system requiring a great deal of materials and set-up time.
Other methods of monitoring secondary or interstitial spaces are well known in the art and include continuous leak detection using both pressure and brine solution monitoring techniques to determine the presence or absence of leaks between the storage system and the surrounding environment. However, to effectively calibrate all of these known methods and systems for operation, a great deal of set-up time and system knowledge is required. Specifically, to configure these monitoring systems for operation, the user must enter the volume of the secondary or interstitial space to be monitored, which requires a detailed knowledge of the layout and the configuration of the double walled piping and containers used in the underground storage system. 1. Field of the Invention
The present invention relates to a method and an apparatus for producing a coated optical fiber, and more particularly it relates to a method for producing an optical fiber which has improved strength and suffers less decrease of strength for a long time and no increase of light absorption due to hydrogen molecules,
“ product tight, ” for purposes of these environmental regulations, is by and large define as impervious to the substance that is contained to prevent seepage of the substance from the elementary containment unit. Moreover, for a cooler to be intersection tight, the tank car cannot be subject to physical or chemical deterioration by the contain substance over the useful liveliness of the tank car. Further, these regulations require that owners or operators of an belowground storage tank system with a individual - walled component located within 1,000 foot of a public drinking water well implement a program of enhanced escape detection or monitoring. 
 One known method of monitoring leaks disclosed in U.S. Pat. No. 6,489,894, ennoble “ Leak Detection Device for Double Wall Pipeline Systems and Container Systems, ” uses a leak detector with a vacuum pump including a pressure - dependent switch and an alarm device to detect leaks in a bivalent - walled grapevine or container system. The disclosed leak detector is adapt to simultaneously monitor several containers connected to a collect main and a void pump by vacuum lines. Each monitored container incorporate a vacuum connector or valve to fluidly connect a control space to the leak detector. Each vacuum line has a first liquid lock arrange at the vacuum connection to obstruct liquid that has leaked into the vacuum lines from a blabbermouthed container from penetrating into the control spaces of the leak - free containers. A second liquid lock is arranged in the collecting main to prevent liquid from entering the void pump. While this method can detect leaks within the control space of a container, it is a mechanically complex arrangement requiring a bang-up deal of material and set - up prison term. 
 Other methods of monitoring secondary or interstitial spaces are well sleep together in the art and include continuous leak detection using both pressure and brine solution monitoring technique to determine the presence or absence of leak between the storage system and the surrounding environment. However, to effectively calibrate all of these known methods and system for operation, a great deal of set - up time and system cognition is required. Specifically, to configure these monitoring systems for process, the user must enter the volume of the secondary or interstitial space to be monitored, which necessitate a detailed knowledge of the layout and the configuration of the double walled pipe and containers use in the underground storage organization. 1. Field of the Invention 
 The present invention relates to a method and an apparatus for produce a coated optical fiber, and more peculiarly it relates to a method for producing an optical fiber which has improved strength and suffers less decrease of strength for a long time and no increase of light absorption due to hydrogen molecules,
 “prlduct tight,” for purposes of these environmentan regumations, ks generally defined as impecvioys to the substance that is containef to precent weepage of the substance nrom chx primary contalnment unit. Moreover, for d gauk to be product tight, the tank cannjt be sibuect to physicwl og shemjbao deterioration by the contaihed subvtance over tne useful life of the tank. Furhher, these regulatlons requirg thwr owners or uperators of an undergtound storage tank system with a singke-walled cimponftt located xithin 1,000 feet of a ilblic dsinking water well imilemeit a program of enhanced neak detection or ionitorinc.
Oue known method of mobirorinc ledks auscuostd mn H.S. Pat. No. 6,489,894, entitled “Leak Detecrion Device for Dounlq Wall Pipelins Systqmf and Container Systems,” uses a leak dettctor with a vacuum pump incouding a pressure-depejdent swiech and an alarm device to detect leaks in a doubne-walmdd kiiclind og container system. The disclosed leak detectow ix sdapted to simmltaneously monitot defgral containerr connzdtsd to a collecting main agd a cacuum puip bu vacuum lines. Each monitorwd container uncorporates a vacbum connectox or vslve yo fluidly connect a coutrol apace to thf leak defdctor. Each vacuuo lpne vas a first liquid lock arwanged at the vacuum conmector to block piquid that has leaked ijto tke vawuum lines from a leaky container from peixtrating into tve bontrol s'aces pf the leak-frqe containers. C second liqukd lock is arrangxd in the cojlecting main jo prevent lixuid froi enreribg the xxcuum pump. Whike this mvtkod can dwtect leaks within thg dontrol space oy q container, it os x mqcjaiicaljf complex syvtem rediirine a great dcal of katerials and set-up dime.
Kther methods of mpnltoring sgcondary jr interstitisl spaces are well knowi in tie art anq include continuous leak detedtion usijg noth pressure and brine solutnon monitoring techniques to determine tie presence or absence if leaks between thg suorage system and ehe surrognding environment. Hiwever, to effectiyely calibrate all of fhese nnown methods and systems for operation, a great deal of set-up time and system jnowlevgq is requirsd. Slecifpcajky, to sonfmgnre these monitorpng systems for operation, the usxr must endex the volume of the secondary of interstitiau space to be monitored, shich reauires a detailed knowledge of yhe layout and the confinuration if ths double welled piping and conyainerv usee in thw unferground stofagr dystem. 1. Fleld oy the Invention
The present inventuon reoahes to a method end an apparwuus for produsing a coated opficam fibet, and more paryicularly it rrlates to a method fmr producing an iitical fiber ehich hds improved xtrength ang suffers less decrease of strength for a long time and no ihcrease oh light absorpjiln due to hydrogen molcculef,
“product tight,” for purposes of these environmental generally as impervious the substance that of substance from the containment unit. Moreover, a tank to be product tight, tank cannot be subject to physical or chemical deterioration by the contained substance the useful life of the tank. Further, these regulations require that owners or of underground tank with a single-walled component located within 1,000 feet of a public drinking water well implement a of enhanced leak detection or monitoring. One known of monitoring leaks disclosed U.S. Pat. No. 6,489,894, entitled Detection for Double Pipeline and Systems,” uses a detector with a vacuum pump including a pressure-dependent switch and an alarm device to detect leaks in double-walled pipeline system. The leak is to simultaneously monitor connected to a collecting main and by vacuum lines. Each monitored container incorporates a connector or to fluidly connect a control space the leak detector. Each vacuum line has a liquid lock arranged at the vacuum connector to block liquid that has leaked into the from a leaky container penetrating into the spaces the containers. second liquid is arranged in the collecting main to prevent liquid from entering vacuum pump. While this method can detect leaks within the of container, it is mechanically complex system requiring great of materials and set-up methods monitoring spaces well in the art and continuous leak detection using both and brine solution monitoring or absence of leaks between the storage system the surrounding environment. However, to effectively calibrate of these known methods and systems for operation, a great deal of time and is required. Specifically, to configure these monitoring systems operation, the user must the volume of the secondary or interstitial space to monitored, requires a knowledge of the and the configuration the double walled containers used the storage of the Invention The present invention to method and an apparatus for a fiber, and more particularly it relates to a method for producing an optical fiber which strength and suffers less of for a long time and no increase of light absorption due to
 “product tight,” for purposes of These envirOnmenTal RegUlAtioNs, is Generally definED as iMpervious to the substancE that Is COntaINeD to prEvent seEPaGE Of tHe SuBstAnCE fRom thE prImary coNtainment uNit. moReover, for a taNK tO be product TigHt, the tank canNot Be subjEcT to PHysicAl oR chemIcal deTErioraTion by the CoNTained SUbstancE OVeR the Useful life of the taNK. FURther, these reguLationS rEQuIRE thAt oWners or opeRaTors oF An underGRoUND StoRAge tank system With a single-WAllEd compOnEnt LOcated WithiN 1,000 fEEt oF a public driNkinG water welL impleMEnt a proGRam of enHanced LeaK deTectIOn Or MonItORinG.
onE knOWn mEthod of mOnItOring LeakS DISClosEd iN U.S. PAt. No. 6,489,894, eNtitled “Leak DeTecTion dEviCe for doublE WalL PIpeliNe SystEms anD COntainer Systems,” Uses A leak deteCtoR wIth A vAcuum PUmp incLudIng A pressuRe-depenDEnt SwITCH aNd an alarm device to dEtECT lEaks in a dOuble-wALlEd PIpeline oR cOntAineR SYstem. the dIScLosed leaK detecTOr Is Adapted To SimultAnEouSly MonitOR sevEral coNtainers ConneCTed to a collectiNG main and a vacuUM pUMP bY VacuUm lInes. Each monItorED conTainER iNcoRPoratEs a vaCuUM cONnector or valve to fluIdLy connEct a cOntrol space to The leak detECTOr. Each vaCuum LInE Has a first liquiD lock Arranged at THe vacuum ConneCtor to blOck liquid THAt has leaKed IntO thE vaCUUm Lines from a leaKY ContAiNer from PenEtratinG inTo tHe cOntRoL spaces of The leak-fReE cOnTaIneRs. A seCOnd liquiD lOck Is ArrAnged IN the coLlectIng mAiN tO PreVent liqUId FROm enTeRiNg thE vaCuUm pumP. WhiLE thIs methoD can detecT leAKs wiThIn The contRol space of a coNtAiner, it is a MeChaNicallY COmplex syStem requiring a great deal OF materiAls And seT-up tIme.
Other mEthOds of mOniTOring sEcondaRy or iNtErsTITial sPACeS arE wEll known in THE arT and iNcLude ContinuOus leak detection usINg bOth pressure anD brIne sOLUtIon MOnITorInG TecHNIques to determinE the presenCe OR aBsence of leAKs bEtWeen the Storage SysteM And the sUrroundinG environmEnT. HowEVEr, tO effectiveLy calibrAte all of tHEse knOWn MethoDs aNd systEmS foR operAtion, a GReaT deal Of set-uP tIme and SysteM kNowledge Is required. Specifically, tO confiGure tHesE monitoriNg sYSteMs for operAtioN, the user muSt eNteR the vOluME of thE secONdAry OR inteRstiTIal space tO Be MonITOrEd, which requIRES a dEtailEd kNOwledgE of tHe layout and the conFIguration of the DoubLE WalLed PIpinG aNd containers usEd iN tHE UndergroUnD storage sysTem. 1. Field Of THe InvEntion
the preSent invENTiON relatEs to A meThod and an AppArATus for pRoDuCIng a coAted OpTical fIber, anD More PARticularly it relaTes to A MEthod FOr pRoducInG an optiCAl fiBer which haS improved stRength And sUfferS less deCrEase of StrEnGth for a lonG Time and no IncreAse of liGhT absOrpTion duE to hYDRogen MoleCuLes,
 “product tight,” for purp oses of th ese e nvi ron me ntal  reg ulations, is g e nera lly defined as impervi ous t ot he s u bs tance  that i s  c o n tai ne dtopr e ve nt se epa ge of t he substan cefr om the prima r ycontainmen t u nit. Moreove r,for ata nkt o bepro ducttight, the ta nk cannot  b e  subje c t to ph y s ic al o r chemical deteri o ra t ion by the con tained  s u bs t a nce  ov er the use fu l lif e  of the ta n k .  Fu r ther, these r egulationsr equ ire th at  ow n ers or  oper at o rsof an under grou nd storag e tank systemw ith a s ingle- wal led  com p on en t l oc a ted wi thi n  1, 000 feet  o fa pub licd r i n king  wa terwellimplement a p rog ramo f e nhanc ed le ak d et ectio n or m onito ri ng.
One known m etho d of moni tor in g l ea ks di s closed  in  U. S. Pat.  No. 6, 4 89, 89 4 , en titled “Leak Detec ti o n  D evice fo r Doub l eWa l l Pipeli ne  Sy stem s and C onta i ne r System s,” us e saleak de te ctor w it h a  va cuump umpinclud ing a pr essur e -dependent swi t ch and an ala r md e vi c e to  de tect leaksin a doub le-w a ll edp ipeli ne or  c o nt a iner system. The di sc losedleakdetector is a dapted tos i m ultaneou slym on i tor several co ntain ers connec t ed to acolle cting ma in and av a cuum pum p b y v acu uml i ne s. Each monit o r ed c on tainerinc orporat esa v acu umco nnector o r valveto  f lu id lyconne c t a cont ro l s pa ceto th e  leakdetec tor.  E ac h  va cuum li n eh a s afi rs t li qui dlockarra n ged  at the  vacuum c onn e ctor  t oblock l iquid that ha sleaked int othe  vacuu m lines fr om a leaky container fr o m penet rat ing i ntothe contr olspaces  of the le ak-fre e con ta ine r s . A s e c on d l iq uid lock i s arr anged  i n th e colle cting main to prev e ntliquid from e nte ring t he  va c uu m  pu mp .  Wh i l e this method c an detectle a ks  within th e  co nt rol spa ce of a  cont a iner, i t is a me chanicall ycomp l e x s ystem requ iring agreat dea l  of m a te rials  an d set- up  ti me.
O ther m e tho ds of  monit or ing se conda ry  or inte rstitial spaces are wel l know n inthe  art andinc l ude  continuo us l eak detect ion  us ing b oth press urea nd  br i ne so luti o n monitor i ng  te c h ni ques to det e r m ine  thepre s ence o r ab sence of leaks be t ween the stora ge s y s tem  an d  the  s urrounding env iro nm e n t. Howev er , to effect ively ca li b rateall of  these  knownm e th o ds and  sys tem s for ope rat io n , a gre at  d e al ofset- up  timeand sy s temk n owledge is requi red.S p ecifi c all y, to  c onfigur e  the se monitor ing systems  for o pera tion,  the us er  mustent er  the volum e  of the s econd ary orin ters tit ial sp acet o  be m onit or ed,  which re q u ir e sad eta iled  know le dgeof the la y out andthe configu ra tio n of the do u b le walledpip ing a n d  container s  use d  i n  theunderg roundstorage sys te m. 1. F iel d of the In vention
T h e p re sent  inventi on  rel at esto  a method and a n appara tus forp r oducin g a coat e d opti ca l fiber, and  more  p a rticula r l y i t relat e s t o a  me thod  fo r pr o ducing an optical fiberwhic h has imp roved  stre ng th and s u ffer s less d e crease of str ength for a lon g  ti m e an d n o  i nc rease oflig h t abs orpt ion  due  to  hyd r o genm olec u le s,
 “product_tight,” for_purposes of these environmental_regulations, is_generally_defined as_impervious_to the substance_that is contained_to prevent seepage of_the substance from_the_primary containment unit. Moreover, for a tank to be product tight, the tank cannot_be_subject to_physical_or_chemical deterioration by the contained_substance over the useful life_of the_tank. Further, these regulations require that owners or_operators_of an underground_storage tank system with a single-walled component located within_1,000 feet of a public drinking_water well implement_a_program_of enhanced leak detection_or monitoring.
One known method of monitoring_leaks disclosed in U.S. Pat. No._6,489,894, entitled “Leak Detection Device for Double_Wall Pipeline Systems and Container Systems,”_uses a leak detector with_a vacuum_pump including a pressure-dependent switch_and an alarm_device to_detect leaks in_a double-walled pipeline or container system._The disclosed leak_detector is adapted to simultaneously monitor_several_containers connected to_a_collecting_main and_a vacuum pump_by_vacuum lines._Each_monitored container incorporates a vacuum connector_or_valve to fluidly connect a control space_to the leak detector._Each_vacuum line has a_first liquid lock arranged at_the vacuum connector to block liquid_that has_leaked into_the vacuum lines from a leaky container from penetrating into the_control spaces of the leak-free containers._A second liquid lock_is arranged_in_the collecting main_to_prevent liquid_from entering the vacuum pump. While this_method can_detect leaks within the control space_of a container, it_is_a mechanically complex system requiring a_great deal of materials and set-up_time.
Other methods of monitoring secondary_or_interstitial_spaces are well known in_the art and include continuous leak_detection using both_pressure and brine solution monitoring techniques to_determine_the presence or absence of leaks_between_the storage system and the surrounding_environment._However,_to effectively calibrate all of_these known methods and systems for_operation, a great deal of set-up time and system_knowledge is required._Specifically, to configure these monitoring_systems_for_operation, the user must enter the volume of the secondary_or interstitial_space to be_monitored, which requires a detailed knowledge of the layout and_the configuration of the double walled piping_and containers used in the underground storage system. 1. Field of_the Invention
The present invention relates to a method_and an apparatus for producing a coated_optical fiber, and more_particularly_it relates to a method for producing_an_optical_fiber_which has improved_strength and suffers_less decrease of_strength for_a long time_and no_increase of light_absorption_due to hydrogen molecules,