Kodi fiber polarization controller ndi chiyani?

Kodi fiber polarization controller ndi chiyani?
Tanthauzo: Kachipangizo kamene kamatha kuwongolera mmene kuwala kumayendera mu ulusi wa kuwala. Ambirizida za fiber optic, monga interferometers, amafuna kuti athe kulamulira polarization mkhalidwe wa kuwala mu CHIKWANGWANI. Choncho, mitundu yosiyanasiyana ya olamulira fiber polarization apangidwa.
Chowongolera khutu cha mleme mu ulusi wopindika
A wambapolarization controllerZimatheka ndi kupindika (kapena kupindika) ulusi wa kuwala kuti upeze birefringence. Kuchedwa kwathunthu (kukula kwa birefringence) kumayenderana ndi kutalika kwa ulusi komanso mosagwirizana ndi utali wopindika. Zimagwirizananso ndi mtundu wa fiber optical. Nthawi zina, ulusi wa kuwala ukhoza kuvulazidwa kangapo ndi utali wopindika kuti uchedwe ndi λ/2 kapena λ/4.

Chithunzi 1: Wowongolera makutu a bat polarization, wopangidwa ndi ma coil atatu omwe amatha kuzungulira mozungulira minyewa yachingwe.
Nthawi zambiri, ma coil atatu amagwiritsidwa ntchito popanga mzati, pomwe koyilo yapakati imakhala ngati theka la mafunde ndipo mbali ziwirizo zimakhala ngati ma quarter wave. Koyilo iliyonse imatha kuzungulira mozungulira zomwe zikuchitika komanso ulusi wotuluka. Posintha momwe ma coils atatuwa amayendera, mawonekedwe a polarization a kutalika kwake kwa zochitika amatha kusinthidwa kukhala gawo lililonse lotulutsa polarization. Komabe, zotsatira za polarization zimagwirizananso ndi kutalika kwa mafunde. Pamphamvu yamphamvu kwambiri (yomwe imachitika pafupipafupi kwambiri), kuzungulira kwa polarization kumachitika. Kuzungulira kwa koyilo ya fiber optic sikungakhale kocheperako, apo ayi kupindika kumadzetsa zotayika zina zopindika. Mtundu wina wophatikizika kwambiri, komanso wosakhudzidwa kwambiri ndi kusagwirizana, umagwiritsa ntchito kuphatikizika kwamphamvu (polarization preservation) kwa ulusi wamaso m'malo mwa zolumikizira za ulusi.
WopanikizidwaFiber Polarization Controller
Pali chipangizo chomwe chimatha kupeza ma waveplates osinthika, omwe amatha kupindika kutalika kwa ulusi wowoneka bwino mpaka kumlingo wina pansi pa zovuta zosiyanasiyana. Mwa kutembenuza pang'onopang'ono ndi kukanikiza ulusi wa kuwala mozungulira nsonga yake, ndikuyiyika pamtunda wina kuchokera pagawo loponderezedwa, gawo lililonse la polarization likhoza kupezeka. M'malo mwake, magwiridwe antchito omwewo monga compensator ya Babinet Soleil (mtundu wochulukachipangizo chamagetsiokhala ndi ma birefringent wedges) atha kupezeka, ngakhale kuti mfundo zawo zogwirira ntchito ndizosiyana. Malo oponderezedwa angapo angagwiritsidwenso ntchito, pomwe kupanikizika kokha, osati ngodya yozungulira, kumasintha. Kusintha kwamphamvu kumatheka pogwiritsa ntchito ma transducers a piezoelectric. Chipangizochi chingakhalenso ngati polarizer, kumene piezoelectric imayendetsedwa ndi maulendo osiyanasiyana kapena zizindikiro zowonongeka.