Hauv kev npaj fiber ntau, lub birefringence (B) yog dag ua cov loj, lossis cov fiber ntau uas nws qhov ntev λ yog luv li millimeters, xa mus rau PM fiber lossis HB fiber, birefringence fiber ntau. Los ntawm qhov pom ntawm polarization optics, yog hais tias ib hom dav dav fiber ntau tau suav hais tias yog ib qho isotropic nruab nrab, lub siab birefringence fiber ntau yog sib npaug ntawm cov uniaxial siv lead ua nrog loj birefringence.
Taw qhia
Hauv kev npaj fiber ntau, lub birefringence (B) yog dag ua cov loj, lossis cov fiber ntau uas nws qhov ntev λ yog luv li millimeters, xa mus rau PM fiber lossis HB fiber, birefringence fiber ntau. Los ntawm qhov pom ntawm polarization optics, yog hais tias ib hom dav dav fiber ntau tau suav hais tias yog ib qho isotropic nruab nrab, lub siab birefringence fiber ntau yog sib npaug ntawm cov uniaxial siv lead ua nrog loj birefringence. High birefringence fiber ntau tseem hu ua polarization tswj fiber ntau. Qhov tseeb, lub fiber ntau tuaj yeem tuav lub polarization tsuas yog thaum txoj kev coj ua polarization ntawm lub tswv yim linearly polarized lub teeb yog kis tau raws qhov loj ntawm lub fiber. Kev txhaj tshuaj hauv lwm cov lus qhia tsis tuaj yeem ua rau txoj kev coj ua polarization tsis hloov thaum lub sijhawm sib kis. Lub teeb tawm yuav tsum tau elliptically polarized teeb.
Txheej txheem ntau lawm
Muaj ob txoj hauv kev los tsim PM fiber:
(1) kev nyuaj siab Asymmetrical yog thov sab nraud tub ntxhais kom ua qhov ntsuas phom ntawm cov tub ntxhais asymmetry. Lub ntsiab ntawm cov fibers uas zwm rau hom fiber ntau yog elliptical cladding fiber, hneev khi hom fiber ntau thiab panda hom fiber ntau;
(2) Nws yog elliptical core fiber, uas siv lub asymmetry ntawm cov tub ntxhais geometry. Qhov kev ncua ntev ntawm cov hom fiber ntau ntev me ntsis, tab sis lub thermal stability yog zoo dua li qhov uas muaj fiber ntau.
Thov teb
PM optical fiber muaj cov ntawv thov tseem ceeb hauv kev sib txuas lus fiber ntau thiab kev kho qhov muag fiber ntau.
Kev taw qhia ntawm txoj kev loj hlob
Kev tswj hwm-kho qhov muag fiber ntau yuav muaj kev lag luam ntau dua hauv ob peb xyoos tom ntej no. Nrog txoj kev loj hlob sai ntawm cov thev naus laus zis tshiab hauv ntiaj teb thiab kev tsim kho txuas ntxiv ntawm cov khoom tshiab, kev tswj hwm-tswj qhov muag ntsia hlau loj yuav nthuav dav hauv kev qhia hauv qab no:
(1) Siv cov thev naus laus zis tshiab ntawm photonic siv lead ua fiber ntau los ua ib hom tshiab ntawm kev ua haujlwm siab-ceev polarization tswj fiber ntau;
(2) Txhim kho qhov kub-yoog-tswj polarization-tswj kho qhov muag fiber ntau kom tau raws li cov kev xav tau ntawm aerospace thiab lwm cov teb;
(3) Tsim ntau yam tsis tshua muaj lub ntiaj teb-doped polarization-tswj cov fibers kom tau raws li qhov xav tau ntawm optical amplifiers thiab lwm yam cuab yeej siv;
(4) Tsim fluoride polarization-tswj fiber ntau los txhawb txoj kev txhim kho ntawm cov hluav taws xob fiber ntau cuam tshuam kev lag luam hauv cov teb ntawm infrared astronomy technology;
(5) Tsawg-attenuation polarization-tswj fiber ntau: Nrog kev txhim kho tsis tu ncua ntawm ib hom fiber ntau thev naus laus zis, poob, cov khoom tawg thiab waveguide dispersion tsis muaj cov ntsiab lus tseem ceeb cuam tshuam rau kev sib txuas lus fiber ntau, thiab hom polarization dispersion (PMD) ntawm ib leeg- hom fiber ntau tau maj dhau los ua qhov teeb meem loj tshaj txwv kev ua kom zoo ntawm kev sib txuas lus fiber ntau yog qhov tshwj xeeb hauv kev sib txuas lus high-speed optical fiber ntau ntawm 10 Gbit / s thiab sab saud. Txhawm rau daws qhov teeb meem ntawm qhov tsis zoo ntawm kev xa xov kis tau teeb meem tshwm sim los ntawm PMD, txoj kev daws los them rau PMD yog feem ntau tau saws. Txawm li cas los xij, PMD yog nkag siab zoo heev rau ib puag ncig huab cua xws li ntsuas kub, thiab cuam tshuam me ntsis ntawm lub teeb ci qhov chaw yoj, thiab yuav hloov pauv ntawm lub sijhawm. Txhua tus nqa teeb meem rau PMD them nyiaj ntawm kev sib txuas lus fiber ntau. Yog tias qhov qis-ceev cov kab hluav taws xob-tswj kab hluav taws xob tuaj yeem tsim kho tau zoo, nws yuav muab txoj kev daws tshiab rau PMD cov teeb meem nyob rau hauv qhov high-speed kis tau tus mob;
(6) Siv Kerr nyhuv thiab Faraday tig cov nyhuv los tsim cov khoom ci tshaj plaws
Kev ruaj khov tswj kev them nyiaj fiber ntau
Kev sib txig-tswj kev kho qhov muag fiber ntau tawm cov kab teeb pom kev zoo thiab tau siv dav hauv ntau qhov chaw ntawm kev lag luam hauv teb chaws xws li aerospace, aviation, kev tsav nkoj, kev tsim khoom lag luam thev naus laus zis thiab kev sib txuas lus. Hauv lub interferometric fiber ntau sensor raws li pom kev pom qhov sib txawv, kev siv polarization-tswj fiber ntau tuaj yeem ua kom txoj kab kev hloov pauv tsis sib txig, txhim kho qhov sib piv ntawm lub suab-kom-suab nrov, thiab ua tiav qhov ntsuas qhov ntsuas ntawm cov khoom siv lub cev. Raws li hom tshwj xeeb ntawm optical fiber, polarization tswj fiber ntau yog siv nyob rau hauv cov sensors xws li fiber ntau optic gyroscopes, fiber ntau kho qhov muag, thiab fiber ntau qhov txuas sib txuas lus xws li DWDM thiab EDFA. Vim tias fiber ntau optic gyroscopes thiab fiber ntau kho qhov muag ua ke siv tau rau hauv tub rog inertial navigation thiab sonar, lawv yog cov khoom lag luam siab, thiab polarization-kev tswj hwm fiber yog nws cov khoom tseem ceeb, yog li polarization-tswj fiber tau ib zaug nyob rau hauv cov npe ntawm cov khoom lag luam tawm tsam Tuam Tshoj los ntawm sab hnub poob tsim lub teb chaws. Qee lub tuam txhab optical fiber ntau tau tsim tau.