Kev tswj hwm kev tswj hwm fiber ntau: Kev tswj kav tswj hwm kev lag luam fiber ntau kis kab teeb ci polarized teeb, uas tau siv dav hauv ntau qhov chaw ntawm kev lag luam hauv teb chaws xws li aerospace, aviation, navigation, kev tsim khoom lag luam thiab kev sib txuas lus. Hauv lub interferometric fiber ntau sensor raws li pom kev pom qhov sib txawv, kev siv polarization-kev tswj cov fiber ntau tuaj yeem xyuas kom qhov kev coj ua polarization tseem tsis hloov, txhim kho qhov sib piv lub suab-kom-suab nrov, thiab ua tiav qhov ntsuas qhov ntsuas ntawm lub cev qhov ntau. 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 tub rog inertial navigation thiab sonar, lawv yog cov khoom lag luam siab, thiab polarization-kev tswj hwm fiber yog nws cov ntsiab lus, 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. Tam sim no qee lub tuam txhab optical fiber ntau lub tuam txhab tuaj yeem tsim nws.
Hauv txheej txheem teeb duab ntawm polarization-tswj fiber ntau, vim cov qauv tsis xws luag tsim sab hauv fiber ntau, polarization-tswj kev ua tau zoo yuav raug txo, uas yog, thaum linearly polarized lub teeb tau kis raws tus yam ntxwv ntawm lub fiber, ib feem ntawm qhov kho qhov muag teeb liab yuav txuas mus rau hauv lwm kab sib chaws rau nws. Tus yam ntxwv sib txawv thaum kawg ua rau lub polarization extinction ratio ntawm cov zis polarized teeb liab lub teeb kom tsawg. Qhov kev ntxeev no cuam tshuam birefringence nyhuv hauv fiber. Hauv txoj cai polarization tswj hwm fiber ntau, lub dag lub zog birefringence nyhuv, qhov luv dua qhov kev ncua ntev, thiab qhov zoo dua lub xeev polarization ntawm lub teeb kis tau raug tswj.
Txawm hais tias qhov hluav taws xob zoo tshaj plaws optical fiber yog tsim hluav taws xob, nws yuav muaj kev nyuaj siab rau lub cev thiab dhau los ua qhov tsis xws ntawm kev siv, ua rau birefringence. Yog li no, lub xeev polarization ntawm lub teeb yuav hloov tsis xwm yeem thaum kis hauv cov hluav taws xob zoo ib yam. Cov yam tseem ceeb cuam tshuam yog wavelength, curvature, kub thiab lwm yam.
Kev tswj hwm kev tswj hwm fiber ntau tuaj yeem daws cov teeb meem ntawm kev hloov pauv lub xeev pauv, tab sis nws tsis tuaj yeem tshem tawm qhov teeb meem birefringence hauv lub fiber. Ntawm qhov tsis sib xws, kev tsim qauv ntawm cov fiber ntau geometry tuaj yeem tsim muaj lub zog birefringence zoo dua los tshem tawm cov kev ntxhov siab ntawm lub xeev polarization ntawm qhov teeb meem. Cuam Tshuam.
Yog li, txoj cai tswj-tswj cov fibers feem ntau siv hauv cov ntawv thov uas nkag siab ntau dua rau polarization, xws li interferometers, lossis lasers, lossis hauv kev sib txuas ntawm cov khoom siv hluav taws xob thiab cov sab nraud hloov kho, thiab lwm yam.
