Yintoni isilawuli se-fiber polarization?

Yintoni isilawuli se-fiber polarization?
Inkcazo: Isixhobo esinokulawula imeko ye-polarization yokukhanya kwimicu ye-optical. Abaninziizixhobo zefiber optic, ezifana ne-interferometers, zifuna ukukwazi ukulawula imeko ye-polarization yokukhanya kwifiber. Ngoko ke, iintlobo ezahlukeneyo zokulawula i-fiber polarization ziye zaphuhliswa.
Isilawuli sendlebe yelulwane kwifiber egobileyo
A eqhelekileyoumlawuli wepolarizationkuphunyezwa ngokugoba (okanye ukujija) iifiber zamehlo ukuze ufumane i-birefringence. Ukulibaziseka okupheleleyo (ubungakanani be-birefringence) bulingana nobude befiber kunye nokulinganisa ngokuphambeneyo kwiradiyo yokugoba. Ikwanxulumene nohlobo lwefiber optical. Kwezinye iimeko, i-fiber optical inokulimala amaxesha amaninzi kunye ne-radius yokugoba ethile ukufumana ukulibaziseka kwe-λ/2 okanye λ/4.

Umzobo 1: Isilawuli se-bat ear polarization, equkethe iikhoyili ezintathu zefiber optic ezinokujikeleza kunye ne-axis ye-fiber yesiganeko.
Ngokuqhelekileyo, iikhoyili ezintathu zisetyenziselwa ukwenza ikholamu, kunye nekhoyili ephakathi njengesiqingatha sepleyiti yamaza kunye namacala amabini njengekota yeepleyiti zamaza. Ikhoyili nganye inokujikeleza ecaleni kwe-axis yesiganeko kunye ne-fiber optical ephumayo. Ngokulungelelanisa i-orientation yeekhoyili ezintathu, imeko ye-polarization ye-wavelength ethile yeziganeko inokuguqulwa kuyo nayiphi na imveliso ye-polarization state. Nangona kunjalo, impembelelo kwi-polarization inxulumene nobude be-wavelength. Kumandla aphezulu aphezulu (adla ngokuvela kwi-ultra short pulses), ukujikeleza kwe-polarization okungaqhelekanga kwenzeka. Idayamitha yekhoyili yefiber optic ayinakuba ncinci kakhulu, kungenjalo ukugoba kuya kwazisa ilahleko eyongezelelweyo yokugoba. Olunye uhlobo oluxineneyo ngakumbi, kwaye lunovakalelo olungaphantsi kokungahambelani, lusebenzisa i-birefringence eyomeleleyo (ukugcinwa kwepolarization) yeefiber zamehlo kuneekhoyili zefiber.
IcinezelweIFayibha Polarization Controller
Kukho isixhobo esinokufumana ii-waveplates eziguquguqukayo, ezinokucinezela ubude beefayili ze-optical ukuya kwinqanaba elithile phantsi koxinzelelo oluhlukeneyo. Ngokujikeleza ngokuthe ngcembe kunye nokucinezela i-fiber optical ejikeleze i-axis yayo, kunye nokuyibamba kumgama othile ukusuka kwicandelo loxinzelelo, nayiphi na imeko ye-polarization yemveliso inokufumaneka. Enyanisweni, ukusebenza okufanayo kunye ne-Babinet Soleil compensator (uhlobo lobuninziisixhobo sokubonaequlethe i-birefringent wedges) inokufumaneka, nangona imigaqo yabo yokusebenza yahlukile. Izikhundla ezininzi zoxinzelelo zingasetyenziselwa, apho kuphela uxinzelelo, kungekhona i-angle yokujikeleza, utshintsho. Utshintsho loxinzelelo ludla ngokufezekiswa ngokusebenzisa ii-piezoelectric transducers. Esi sixhobo sinokusebenza njenge-polarizer, apho i-piezoelectric iqhutywe ngamaza ahlukeneyo okanye iimpawu ezingaqhelekanga.