Kodi chowongolera polarization ya ulusi ndi chiyani?

Kodi chowongolera polarization ya ulusi ndi chiyani?
Tanthauzo: Chipangizo chomwe chingathe kuwongolera momwe kuwala kumakhalira mu ulusi wa kuwala. Zambirizipangizo za fiber optic, monga ma interferometer, amafunika mphamvu yowongolera momwe kuwala kumakhalira mu ulusi. Chifukwa chake, mitundu yosiyanasiyana ya owongolera ulusi wa polarization yapangidwa.
Chowongolera makutu a mleme mu ulusi wopindika wa kuwala
Chofalachowongolera kugawanikaKumatheka popinda (kapena kupotoza) ulusi wa kuwala kuti upeze birefringence. Kuchedwa konse (kukula kwa birefringence) kumagwirizana ndi kutalika kwa ulusi ndipo kumagwirizana ndi radius yopindika. Kumagwirizananso ndi mtundu wa ulusi wa kuwala. Nthawi zina, ulusi wa kuwala ukhoza kukulungidwa kangapo ndi radius yeniyeni yopindika kuti upeze kuchedwa kwa λ/2 kapena λ/4.

Chithunzi 1: Chowongolera makutu a bat, chokhala ndi ma fiber optic coil atatu omwe amatha kuzungulira motsatira mzere wa incidence fiber.
Kawirikawiri, ma coil atatu amagwiritsidwa ntchito kupanga mzati, ndi coil yapakati ngati mbale ya theka la mafunde ndi mbali ziwiri ngati ma quarter wave plates. Coil iliyonse imatha kuzungulira motsatira mzere wa incidence ndi outgoing optical fibers. Mwa kusintha momwe ma coil atatuwo akuonekera, polarization state ya wavelength inayake ya incidence ingasinthidwe kukhala output polarization state iliyonse. Komabe, kukhudzidwa kwa polarization kumakhudzananso ndi wavelength. Pa high peak power (nthawi zambiri imachitika mu ultra short pulses), nonlinear polarization rotation imachitika. M'mimba mwake mwa fiber optic coil simungakhale wochepa kwambiri, apo ayi kupindika kudzabweretsa kutayika kwina kopindika. Mtundu wina wocheperako, komanso wosakhudzidwa kwambiri ndi nonlinearity, umagwiritsa ntchito birefringence yamphamvu (polarization preservation) ya ma optical fibers m'malo mwa ma fiber coils.
YopanikizikaCHIKWANGWANI kugawanika Mtsogoleri
Pali chipangizo chomwe chingapeze ma waveplates osinthasintha, omwe amatha kufinya kutalika kwa ulusi wa kuwala mpaka pamlingo winawake pansi pa kupsinjika kosiyanasiyana. Mwa kuzungulira pang'onopang'ono ndikufinya ulusi wa kuwala mozungulira mzere wake, ndikuuyika patali kuchokera ku gawo loponderezedwa, mkhalidwe uliwonse wa polarization wotuluka ungapezeke. Ndipotu, magwiridwe antchito ofanana ndi a Babinet Soleil compensator (mtundu wa bulk).chipangizo chowunikira(yokhala ndi ma wedge awiri a birefringent) ingapezeke, ngakhale kuti mfundo zawo zogwirira ntchito ndizosiyana. Malo angapo okakamira angagwiritsidwenso ntchito, komwe kupanikizika kokha, osati ngodya yozungulira, kumasintha. Kusintha kwa kuthamanga nthawi zambiri kumachitika pogwiritsa ntchito ma transducer a piezoelectric. Chipangizochi chingagwiritsidwenso ntchito ngati polarizer, komwe piezoelectric imayendetsedwa ndi ma frequency osiyanasiyana kapena zizindikiro zosasinthika.