Lub tshuab tswj hwm polarization fiber yog dab tsi?

Lub tshuab tswj hwm polarization fiber yog dab tsi?
Kev Txhais Lus: Ib lub cuab yeej uas tuaj yeem tswj tau lub xeev polarization ntawm lub teeb hauv cov fibers optical. Ntaucov khoom siv fiber optic, xws li interferometers, xav tau lub peev xwm los tswj lub xeev polarization ntawm lub teeb hauv lub fiber. Yog li ntawd, ntau hom fiber polarization controllers tau tsim.
Tus maub los tswj pob ntseg hauv cov fiber ntau optical
Ib qho kev sib koom ua ketswj hwm polarizationyog ua tiav los ntawm kev khoov (lossis winding) optical fibers kom tau txais birefringence. Tag nrho qhov kev ncua sij hawm (birefringence loj) yog proportional rau qhov ntev ntawm lub fiber thiab inversely proportional rau lub vojvoog khoov. Nws kuj muaj feem xyuam rau hom optical fiber. Hauv qee kis, lub optical fiber tuaj yeem raug qhwv ntau zaus nrog lub vojvoog khoov tshwj xeeb kom tau txais kev ncua sij hawm ntawm λ / 2 lossis λ / 4.

Daim Duab 1: Lub pob ntseg pob ntseg polarization controller, muaj peb lub fiber optic coils uas tuaj yeem tig raws lub axis ntawm qhov teeb meem fiber.
Feem ntau, peb lub kauj siv los tsim ib kem, nrog rau lub kauj nruab nrab ua ib nrab nthwv dej thiab ob sab ua plaub lub voj voog nthwv dej. Txhua lub kauj tuaj yeem tig raws txoj kab ntawm qhov xwm txheej thiab tawm ntawm cov fibers optical. Los ntawm kev kho qhov kev taw qhia ntawm peb lub kauj, lub xeev polarization ntawm qhov tshwj xeeb wavelength ntawm qhov tshwm sim tuaj yeem hloov mus rau hauv txhua lub xeev polarization tso zis. Txawm li cas los xij, qhov cuam tshuam rau polarization kuj cuam tshuam nrog wavelength. Ntawm lub zog siab tshaj plaws (feem ntau tshwm sim hauv ultra luv luv pulses), nonlinear polarization rotation tshwm sim. Lub cheeb tsam ntawm lub fiber optic kauj tsis tuaj yeem me dhau, txwv tsis pub khoov yuav ua rau muaj kev poob khoov ntxiv. Lwm hom compact dua, thiab tsis tshua muaj kev cuam tshuam rau nonlinearity, siv lub zog birefringence (polarization preservation) ntawm cov fibers optical es tsis yog fiber coils.
NiasFiber Polarization Controller
Muaj ib lub cuab yeej uas tuaj yeem tau txais cov waveplates sib txawv, uas tuaj yeem nias qhov ntev ntawm cov fibers optical rau qee qhov nyob rau hauv ntau yam kev ntxhov siab. Los ntawm kev maj mam tig thiab nias cov fiber ntau optical nyob ib puag ncig nws lub axis, thiab clamping nws ntawm qee qhov deb ntawm qhov seem compression, txhua qhov tso zis polarization xeev tuaj yeem tau txais. Qhov tseeb, tib yam kev ua tau zoo li Babinet Soleil compensator (ib hom ntawm bulkkhoom siv kho qhov muagmuaj ob lub birefringent wedges) tuaj yeem tau txais, txawm hais tias lawv cov hauv paus ntsiab lus ua haujlwm sib txawv. Ntau qhov chaw nias kuj tseem siv tau, qhov twg tsuas yog lub siab, tsis yog lub kaum sab xis tig, hloov pauv. Kev hloov pauv siab feem ntau ua tiav los ntawm kev siv piezoelectric transducers. Lub cuab yeej no kuj tseem tuaj yeem ua haujlwm ua polarizer, qhov twg piezoelectric yog tsav los ntawm ntau zaus lossis cov cim random.