Yintoni isilawuli se-fiber polarization?

Yintoni isilawuli se-fiber polarization?
Inkcazo: Isixhobo esinokulawula imeko yokukhanya kwe-polarisation kwiifayibha ze-optical. Uninziizixhobo ze-fiber optic, njengee-interferometers, zifuna amandla okulawula imeko yokukhanya kwe-polarization kwifayibha. Ke ngoko, kuye kwaveliswa iintlobo ezahlukeneyo zabalawuli be-fiber polarization.
Isilawuli seendlebe zeBat kwifayibha ye-optical egobileyo
Isiqheloisilawuli sokwahlulwahlulwaifezekiswa ngokugoba (okanye ukujija) iifayibha ze-optical ukuze kufunyanwe i-birefringence. Ukulibaziseka okupheleleyo (ubukhulu be-birefringence) kuhambelana nobude befayibha kwaye kuhambelana ngokuphambeneyo ne-radius yokugoba. Ikwanxulumene nohlobo lwefayibha ye-optical. Kwezinye iimeko, ifayibha ye-optical inokugotywa amaxesha amaninzi nge-radius ethile yokugoba ukuze kufunyanwe ukulibaziseka kwe-λ/2 okanye i-λ/4.

Umfanekiso 1: Isilawuli se-Bat ear polarization, esenziwe ngee-fiber optic coils ezintathu ezinokujikeleza ecaleni kwe-axis ye-incident fiber.
Ngokwesiqhelo, iikhoyili ezintathu zisetyenziselwa ukwenza ikholamu, apho ikhoyili ephakathi njengepleyiti yesiqingatha sewave kunye namacala amabini njengeepleyiti zekota yewave. Ikhoyili nganye inokujikeleza ecaleni kwe-axis ye-incident kunye nee-optical fibers eziphumayo. Ngokulungisa ukujongwa kweekhoyili ezintathu, imeko ye-polarization ye-wavelength ethile ye-incidence inokuguqulwa ibe yiyo nayiphi na imeko ye-polarization ye-output. Nangona kunjalo, impembelelo kwi-polarization ikwanxulumene ne-wavelength. Ngamandla aphezulu (ahlala esenzeka kwii-ultra short pulses), ukujikeleza kwe-nonlinear polarization kuyenzeka. Ububanzi bekhoyili ye-fiber optic abunakuba mncinci kakhulu, kungenjalo ukugoba kuya kungenisa ilahleko ezongezelelweyo zokugoba. Olunye uhlobo oluncinci ngakumbi, kwaye olungachukumisi kangako kwi-nonlinearity, lusebenzisa i-birefringence enamandla (ukugcinwa kwe-polarization) yee-optical fibers endaweni yee-fiber coils.
IcinezelweIsilawuli seFiber Polarization
Kukho isixhobo esinokufumana ii-waveplates eziguquguqukayo, ezinokucinezela ubude bee-optical fibers ukuya kwinqanaba elithile phantsi koxinzelelo oluhlukeneyo. Ngokujikeleza kancinci nangokucinezela i-optical fiber ejikeleze i-axis yayo, kwaye uyibambe kumgama othile ukusuka kwicandelo lokucinezelwa, naliphi na imeko ye-polarization yemveliso ingafumaneka. Enyanisweni, ukusebenza okufanayo ne-Babinet Soleil compensator (uhlobo lwe-bulk).isixhobo se-opticalequlethe ii-wedges ezimbini ze-birefringent) zinokufunyanwa, nangona imigaqo yazo yokusebenza yahlukile. Iindawo ezininzi zokucinezelwa nazo zingasetyenziswa, apho uxinzelelo kuphela, kungekhona i-engile yokujikeleza, etshintshayo. Utshintsho loxinzelelo ludla ngokufezekiswa kusetyenziswa ii-transducers ze-piezoelectric. Esi sixhobo sinokusebenza njenge-polarizer, apho i-piezoelectric iqhutywa zii-frequency ezahlukeneyo okanye imiqondiso engacwangciswanga.