Fiber polarization controller ke eng?

Fiber polarization controller ke eng?
Tlhaloso: Sesebelisoa se ka laolang boemo ba polarization ea leseli ka har'a likhoele tsa optical. Tse ngatalisebelisoa tsa fiber optic, joalo ka li-interferometers, li hloka bokhoni ba ho laola boemo ba polarization ea leseli ka har'a fiber. Ka hona, mefuta e fapaneng ea taolo ea polarization ea fiber e entsoe.
Selaoli sa tsebe ea 'mankhane ka har'a fiber e kobehileng ea optical
E tloaelehilengtaolo ea polarizatione finyelloa ka ho kobeha (kapa ho tsoelipana) likhoele tsa optical ho fumana li-birefringence. Kakaretso ea tieho (boholo ba birefringence) e lekana le bolelele ba fiber 'me e bapa le radius e kobehang. E boetse e amana le mofuta oa fiber optical. Maemong a mang, fiber ea optical e ka lematsoa ka makhetlo a 'maloa ka sebaka se itseng sa ho kobeha ho fumana tieho ea λ/2 kapa λ/4.

Setšoantšo sa 1: Selaoli sa polarization ea 'mankhane, se nang le likhoele tse tharo tsa fiber optic tse ka potolohang haufi le axis ea fiber ea ketsahalo.
Hangata, ho sebelisoa likhoele tse tharo ho etsa kholomo, 'me khoele e bohareng e le halofo ea leqhubu le mahlakore a mabeli e le lipoleiti tsa quarter wave. Khoele e 'ngoe le e' ngoe e ka potoloha haufi le axis ea ketsahalo le likhoele tsa optical tse tsoang. Ka ho lokisa mokhoa oa li-coil tse tharo, boemo ba polarization ba wavevelength e itseng ea liketsahalo bo ka fetoloa boemong bofe kapa bofe ba polarization ea tlhahiso. Leha ho le joalo, phello ea polarization e boetse e amana le wavelength. Ka matla a phahameng a tlhōrō (hangata a etsahala ka li-pulses tse khutšoanyane haholo), ho potoloha ha polarization ho etsahala. Bophara ba khoele ea fiber optic e ke ke ea ba nyane haholo, ho seng joalo ho kobeha ho tla hlahisa tahlehelo e eketsehileng ea ho kobeha. Mofuta o mong o kopaneng haholoanyane, 'me o sa nahanele ho se lumellane, o sebelisa li-birefringence tse matla (polarization preserving) ea likhoele tsa optical ho fapana le likhoele tsa fiber.
E petelitsoeFiber Polarization Controller
Ho na le sesebelisoa se ka fumanang li-waveplates tse feto-fetohang, tse ka hatellang bolelele ba likhoele tsa optical ho isa tekanyong e itseng tlas'a likhatello tse fapaneng. Ka ho potoloha butle-butle le ho hatella fiber ea optical ho potoloha axis ea eona, le ho e tiisa hole le karolo ea khatello, boemo bofe kapa bofe ba polarization bo ka fumanoa. Ha e le hantle, ts'ebetso e ts'oanang le ea Babinet Soleil compensator (mofuta oa bongatasesebelisoa sa opticale nang le li-wedge tse peli tsa birefringent) li ka fumanoa, le hoja melao-motheo ea bona ea ho sebetsa e fapane. Maemo a mangata a khatello a ka boela a sebelisoa, moo khatello feela, eseng angle ea ho potoloha, e fetohang. Liphetoho tsa khatello hangata li finyelloa ho sebelisoa li-piezoelectric transducers. Sesebelisoa sena se ka boela sa sebetsa e le polarizer, moo piezoelectric e tsamaisoang ke maqhubu a fapaneng kapa matšoao a sa tloaelehang.