Dab tsi yog fiber ntau polarization maub los?

Dab tsi yog fiber ntau polarization maub los?
Kev Txhais Tes: lub cuab yeej uas tuaj yeem tswj hwm lub xeev polarization ntawm lub teeb nyob rau hauv cov xim kho tshiab. CoobFiber Optic Devices, xws li cuam tshuam, xav tau muaj peev xwm tswj hwm lub xeev polarization ntawm lub teeb hauv cov fiber. Yog li ntawd, ntau hom kev tswj hwm fiber ntau polarization tau tsim.
Bat Mov formoller hauv Bent Optical Fiber
Ib qhoPolarization Maub losyog ua tiav los ntawm khoov (lossis winding) kho qhov muag kom tau txais birgestes. Qhov loj me ntsis (Birefringence loj) yog ib feem proportion rau qhov ntev ntawm cov fiber ntau thiab inversely proportional rau kev khoov tshuab hluav taws xob. Nws tseem muaj feem xyuam rau hom kev ntsuas roj kho. Muaj qee kis, lub ntsuas hluav taws xob tau tuaj yeem ua rau ntau zaus nrog kev khoov hluav taws xob tshwj xeeb kom tau txais kev ncua ntawm λ / 2 lossis λ / 4.

Daim duab 1: Bat pob ntseg polarization, muaj ntawm peb lub fiber ntau Optic coils uas tuaj yeem hloov raws li qhov xwm txheej fiber.
Feem ntau, peb coils tau siv los tsim ib kem, nrog nruab nrab coil ua ib nrab yoj phaj thiab ob tog li quarter yoj phiaj. Txhua kauj tuaj yeem tig raws cov axis ntawm qhov xwm txheej thiab tawm ntawm cov khoom siv kho qhov muag. Los ntawm kev kho cov kev qhia ntawm peb kauj, lub xeev polarization ntawm qhov tsis sib xws tuaj yeem hloov mus rau cov zis hauv qab kev tawm hauv lub xeev. Txawm li cas los xij, qhov cuam tshuam rau Polarization kuj muaj feem xyuam rau nthwv cua. Ntawm qhov siab siab peak (feem ntau tshwm sim hauv ultra luv pulses), nonlinear polarization kev sib hloov tshwm sim. Qhov txoj kab uas hla ntawm cov cheic optic chev tsis yog me me, txwv tsis pub muaj kev ua kom paub cov khoom poob ntxiv. Lwm qhov ntau dua hom, thiab tsis tshua nkag siab rau qhov tsis muaj zog, siv cov khoom siv muaj zog (polarization khaws cia ntawm cov roj ntsha roj ntau dua li cov kauj.
PheebFiber polarization Controller
Muaj ib lub cuab yeej uas tuaj yeem tau txais nthwv dej varplates, uas tuaj yeem hloov qhov ntev ntawm Optical fibers rau qee yam nyob rau hauv sib txawv hauv qab sib cav. Los ntawm maj mam tig thiab compressing lub khoos kas kho qhov muag nyob ib ncig ntawm nws axis, thiab clamping nws ntawm qhov deb ntawm cov ntu Compression, txhua cov zis hauv qab teb chaws tuaj yeem tau txais. Qhov tseeb, tib qho kev ua tau zoo ib yam li tus neeg them nyiaj bannetic (ib hom ntawm ntauNtaus Ntawv NtausMuaj ob qho kev sib tw ua ke) tuaj yeem tau txais, txawm tias lawv cov qauv ua haujlwm sib txawv. Ntau txoj haujlwm ua tau kuj tseem siv tau, qhov twg tsuas yog lub siab, tsis yog kev sib hloov Angle, hloov pauv. Kev hloov siab hloov pauv yog feem ntau ua tiav siv cov piezoelectric transducers. Cov cuab yeej no tseem tuaj yeem ua tus lej polarizer, uas cov piezoelectric yog tsav los ntawm cov cim sib txawv lossis cov cim sib cav.