Optical cable, couplers, thiab splitters
Muaj ntau ntau hom fiber ntau fiber ntau; raws li muaj nyob hauv Daim duab 1.1, nws tau muab pob ntau fibers mus rau hauv ib lub koos pij tawj tib lub npoo los yog rau hauv tus qauv lossis zipcord qauv. Cov phaj nyaj ntawm nws cov duab xaus rau lub cev, lub plhaub, thiab txhuam hniav tuaj yeem tsim cov kav dej. Ntawm chav kawm, nws yog ib qhov ua tau kom nrhab cov fibers nyob rau hauv xws li ib txoj kev uas tsis muaj kev sib raug zoo heev ntawm qhov chaw ntawm cov khoom siv fiber ntau thiab cov zis muaj fiber ntau; lub hom phiaj ntawm cov hom phiaj yog ua kom muaj qhov sib txawv los ntawm ib qhov chaw mus rau lwm qhov, rau lub teeb pom kev zoo ua ib qho piv txwv; cov no yog qee zaum raug xa mus rau cov tsis muaj mob, rau lub teeb meem ua piv txwv; cov no yog qee lub npe hu ua cov pob khoom ua lag luam, tab sis lawv muaj tsawg los ua qhov kev xav ntawm kev sib haum xeeb. Hloov cov ntaub ntawv nthuav tawm yog thaum cov fibers tau ua tib zoo npaj kom lawv nyob rau tib qho kev sib thooj ntawm ob hnub ntawm lub nras; xws li tej pob khoom tau hais tias yuav tsum muaj kev sib haum xeeb. Ib qho kev sib xyaw ntawm ib hom fiber ntau yog peev xwm ua tau tus duab zoo txawm tias thaum lub nras tau yooj yim heev; xws li cov fiber ntau kuj muaj ntau cov kev siv hauv lub tshuab tsis pom kev, thiab siv fiber ntau optic endoscopes rau kev siv tshuaj kho mob. Tsis yog tag nrho cov qauv ntawm cov zauv muaj txhij txhua; fused, ruaj ruaj lossis mosaics tuaj yeem siv los hloov cov iav uas tsis tshua daws teeb meem hauv cathode txoj kab hluav taws xob. Mosaics muaj txog pua pua lab ntawm cov tib neeg lub cev nrog lawv cov hlua fused ua ke muaj cov khoom siv sib xyaw hlau zoo heev ntau yam iv homogeneous iav. Lwm daim ntawv thov ntawm mosaics yog ib daim teb tshuab raj.
Yog tias cov duab tsim los ntawm lub lens system ntog rau ib tus nplhaib, nws yog feem ntau yog xav tau kom nws hloov mus rau hauv ib lub dav hlau, piv txwv tias kom phim ib daim duab thaij duab. Lub mosaic tuaj yeem ua tau zoo nkauj thiab txhuam rau ib qho kawg ntawm sab nrauv kom sib txuas nrog cov duab ntawm cov duab, thiab ntawm lwm qhov chaw kom haum rau lub teeb tsa ntawm lub ntsuas. Ib yam li ntawd, ib daim ntawv ntawm cov ntaub fused tapered fibers yuav siv tau los ua kom muaj duab lossis miniaturize tus duab, nyob ntawm seb lub teeb pom kev zoo li cas los xij me me lossis loj kawg ntawm cov fibers.
Ntau yam yooj yim xws li Fiber Optic Splitters, couplers, thiab txuas ua ke; cov hom kev tshaj tawm muaj xws li cov tshuab fiber ntau. Lwm cov kev tsim tawm tswv yim kuj tseem siv, nrog rau micro-optics thiab cov khoom sib txuas ua ke; Txawm li cas los, optical fiber ntau pab tau cov tshwj xeeb yog vim lawv muaj peev xwm nkag tau mus rau hauv cov chaw ua hauj lwm uas twb muaj lawm xws li lwm daim xov cable. Ib qho ntawm ntau tshaj plaws li yog ib qho fiber ntau fiber ntau splitter, feem ntau yog siv rau ib hom fiber ntau. Nyob rau hauv cov txheej txheem no, ob daim iav fais nrog lawv cov tsho tiv thaiv raug tshem tawm kom ze thiab nkag mus rau ib leeg, tom qab ntawd siv lub tshuab hluav taws xob los yog cov cua kub zoo sib xws. Lub teeb uas pib chiv rau hauv ib qho tsuas yog yuav tau sib koom ua ke rau cov phom uas nyob ib sab uas nws tau tawm ntawm thaj av ntawd. Lub teeb pom kev zoo nyob rau hauv ib hom fiber ntau tsis yog rau cov tub ntxhais kawm tab sis txuas mus rau hauv cov chaw thaiv ib puag ncig. Nyob rau hauv cov ntaub ntawv ntawm ib lub fiber ntau taper nws tau pom tau hais tias lub teeb tawm propagating los ntawm cov tswv yim fiber ntau yog pib xa mus rau cladding interface raws li nws nkag hauv cheeb tsam tapered, ces mus rau tub ntxhais-cladding hom ntawm cov nyob ib sab fiber ntau. Lub teeb hloov tsheb rov qab los rau hauv hom kev ua yeeb yam thaum nws tawm ntawm qhov chaw sib tw. Qhov no yog hu ua ib qho kev kaw lus nruab nrab. Lub teeb uas tau pauv mus rau kev siab dua kev txiav txim siab ntawm cov tub ntxhais kawm ntaws ntawm lub plab yog nkag los ntawm lub gigher refractive index ntawm lub tsho loj, uas ua rau muaj kev tshaj tawm. Qhov simplest teeb ntawm lub teeb coupling los ntawm cladding ntawm ib tug fiber mus rau lwm tus los ntawm ib tug fused taper tau piav rau ib tug zoo approximation los ntawm scalar nthwv kab zauv thiab thawj-kev txiav txim perturbation theory; yog tias lub teeb yog propagating raws lub axis, ces pauv ntawm optical zog, p, yog muab los ntawm
Qhov chaw nyob qhov twg yog qhov kev tawm tsam thiab qhov chaw, cov khoom siv, thiab qhov sib txeeb ntawm ob daim txiag ntsej muag. Txawm hais tias qhov no tsuas yog ib qho approximation thiab neglects siab dua cov nqe lus, nws pom cov sinusoidal nyob ntawm lub hwj chim ntawm qhov txuas ntawm lub zog thiab kev vam meej ntawm lub hwj chim hloov ntawm cladding inch thiab lwm yam teebmeem. Tapered couplers yuav siv tau los cais cov wavelengths uas siv qhov kev cia siab no; los ntawm kev xaiv ntawm kev ntaus ntawv ntev thiab kev sib tw, ob lub wavelengths tuaj yeem tawm tau los ntawm ob qhov sib txawv ntawm qhov chaw tso tawm. Tej daim ntaub ntawv muaj xws li cov ntxig rau cov kabmob (wavelength) multiplexing (WDM), lossis cov teebmeem loj thiab cov twj tso dag rau hauv lub tshuab hluav taws xob (erbium-doped fiber amplifier). Muaj qee zaum, xws li Fiber Splicer, nws xav tau ntau tshaj qhov tshem tawm ntawm kev ua haujlwm ntawm lub zog; acromatic couplers tuaj yeem tsim tau los ntawm kev siv ob daim txiag ntsej muag uas muaj qhov sib txawv ntawm qhov sib txuas. Cov no yog hu ua dissimilar fibers; hauv feem ntau, cov fibers tau ua los ntawm kev hloov los ntawm lawv qhov hloov ntawm lawv txoj kab los yog cov cim qis. Hauv qhov no, qhov sib npaug ntawm kev ua kom sib txuas rau lub hwj chim yuav tsum muab kho thiab lub hwj huam thiab txoj kev nrug tsis yog tsuas yog kev txhaum sinusoidal, tab sis ua ntau yam ntxiv.
Lwm cov kev qhia kuj tau, xws li kev ntaus cov cuab yeej xws li hom kev nthuav dav tshaj qhov kab zauv, lossis encapsulating cov fibers nyob hauv ib qho khoom siv thib peb uas muaj kev txhawj xeeb txawv. Feem ntau, nws yog ntshaw mus rau peb cov ntaub ntawv nrog ib tug txawv refactive Performance index. Feem ntau, nws yog ntshaw kom taper ntau ntau lub cev ua ke thiaj li hais tias lub teeb liab tawm ntawm qhov sib txawv ntawm ntau cov zis fibers. Feem ntau, ib qho kev tawm tswv yim yog faib rau hauv cov khoom siv, qhov chaw ntawm cov qauv ntawm cov cheeb tsam hauv cheeb tsam tau cuam tshuam rau cov zis hluav taws xob; kev tu xyuas yuav tsum tau ua kom tiav qhov au cov twj paj nruag optical zog faib ntawm cov zis fibers. Lub hwj huam ntawm qhov muag tau pom los ntawm ib lub fib mus rau lwm tus tuaj yeem hloov tau los ntawm kev siv lub tapered los ntawm kev siv cov raj ntawm qhov txuas ntawm nws qhov nruab nrab; rau lwm tus kuj tuaj yeem hloov tau los ntawm kev siv cov khoom sib txuas ntawm nws qhov nruab nrab; qhov no frustrates coupled hwj huam hloov. Piv txwv, tshem tawm ib kawg ntawm 1 cm ntev taper los ntawm tsuas yog 1 hli tuaj yeem hloov lub hwj chim txuas ntxiv los ntawm. Cov ntawv thov rau cov nyhuv no muaj xws li kev sib txawv ntawm cov neeg tsis mloog lus thiab cov kauj vuam siv qhov muag.
