Iyini isilawuli se-fiber polarization?

Iyini isilawuli se-fiber polarization?
Incazelo: Idivayisi engalawula isimo sokukhanya kwe-polarization kuma-optical fibers. Amaningiamadivayisi e-fiber optic, njenge-interferometers, zidinga ikhono lokulawula isimo sokukhanya kwe-polarization ku-fiber. Ngakho-ke, kuye kwasungulwa izinhlobo ezahlukene zezilawuli ze-fiber polarization.
Isilawuli sezindlebe zelulwane nge-fiber optical egobile
Okuvamileisilawuli sokwehlukanisakufezwa ngokugoba (noma ukugoba) imicu ye-optical ukuze kutholakale i-birefringence. Ukulibaziseka okuphelele (usayizi we-birefringence) kuhambelana nobude be-fiber futhi kuhambelana ngokuphambene ne-radius yokugoba. Kuhlobene futhi nohlobo lwe-fiber ye-optical. Kwezinye izimo, i-fiber ye-optical ingagoba izikhathi eziningana nge-radius ethile yokugoba ukuze kutholakale ukulibaziseka okungu-λ/2 noma λ/4.

Umfanekiso 1: Isilawuli se-bat ear polarization, esakhiwe ngama-fiber optic coil amathathu angajikeleza eceleni kwe-axis ye-incident fiber.
Ngokuvamile, amakhoyili amathathu asetshenziswa ukwakha ikholomu, lapho ikhoyili ephakathi njengepuleti legagasi eliyisigamu kanye nezinhlangothi ezimbili njengepuleti lamagagasi angamakota. Ikhoyili ngayinye ingajikeleza eceleni kwe-axis ye-incidence kanye ne-outgoing optical fibers. Ngokulungisa ukuma kwamakhoyili amathathu, isimo se-polarization se-wavelength ethile ye-incidence singaguqulwa sibe yinoma yisiphi isimo se-output polarization. Kodwa-ke, umthelela ku-polarization uhlobene ne-wavelength. Ngamandla aphezulu kakhulu (ngokuvamile ayenzeka kuma-pulses amafushane kakhulu), ukujikeleza kwe-nonlinear polarization kwenzeka. Ububanzi bekhoyili ye-fiber optic abukwazi ukuba buncane kakhulu, ngaphandle kwalokho ukugoba kuzoletha ukulahlekelwa okwengeziwe kokugoba. Olunye uhlobo oluncane kakhulu, futhi olungazweli kakhulu ku-nonlinearity, lusebenzisa i-birefringence enamandla (ukulondolozwa kwe-polarization) yemicu ye-optical kune-fiber coils.
KucindezelweIsilawuli se-Fiber Polarization
Kukhona idivayisi engathola ama-waveplate aguquguqukayo, angacindezela ubude bemicu ye-optical ngezinga elithile ngaphansi kwezingcindezi ezihlukahlukayo. Ngokujikeleza kancane kancane nangokucindezela i-optical fiber ezungeze i-axis yayo, nokuyibopha ebangeni elithile ukusuka esigabeni sokucindezela, noma yisiphi isimo sokuhlukanisa okukhiphayo singatholakala. Eqinisweni, ukusebenza okufanayo ne-Babinet Soleil compensator (uhlobo lobuningi).idivayisi yokukhanya(equkethe ama-wedge amabili e-birefringent) angatholakala, yize izimiso zawo zokusebenza zihlukile. Izikhundla eziningi zokucindezela nazo zingasetshenziswa, lapho ingcindezi kuphela, hhayi i-engeli yokujikeleza, eshintshayo. Izinguquko zokucindezela zivame ukufezwa kusetshenziswa ama-transducer e-piezoelectric. Le divayisi ingasebenza futhi njenge-polarizer, lapho i-piezoelectric iqhutshwa khona amaza ahlukene noma izimpawu ezingahleliwe.