"I-polarization" yimpawu eziqhelekileyo ze-lasers ezahlukeneyo, ezichongwa ngumgaqo wokwakheka kwe-laser. Ilaser beamuveliswa yi-radiation evuselelweyo yamasuntswana aphakathi kokukhanya okukhuphayo ngaphakathilaser. I-radiation evuselelweyo inempawu ephawulekayo: xa i-photon yangaphandle ibetha i-particle kwindawo ephezulu yamandla, i-particle ikhupha i-photon kwaye iguqukela kwimeko yamandla aphantsi. Iifotoni eziveliswe kule nkqubo zinesigaba esifanayo, ulwalathiso lokusasaza kunye ne-polarization state njengeefotoni zangaphandle. Xa i-photon stream yenziwe kwi-laser, zonke iifotoni kwimodi ye-photon stream zabelana ngesigaba esifanayo, i-propagation direction, kunye ne-polarization state. Ke ngoko, imowudi ye-laser longitudinal (i-frequency) kufuneka yenziwe i-polarized.
Ayizizo zonke ii-laser ezenziwe nge-polarized. Imeko yepolarization yelaser ichatshazelwa zizinto ezininzi, ezibandakanya:
1. Ukubonakaliswa kwe-resonator: Ukuqinisekisa ukuba iifotoni ezininzi zibekwe kwindawo ukuze zenze i-oscillations ezinzileyo kwi-cavity kwaye ivelise.ukukhanya laser, isiphelo sobuso be-resonator ngokuqhelekileyo sifakwe ifilimu ebonisa uphuculo. Ngokomthetho weFresnel, isenzo sefilimu ebonisa imiboniso emininzi ibangela ukuba ukukhanya okubonakalisiweyo kutshintshe ukusuka ekukhanyeni kwendalo ukuya kumgca.ukukhanya kwepolarized.
2. Iimpawu zendlela yokuzuza: ukuveliswa kwelaser kusekelwe kwi-radiation evuselelweyo. Xa iiathom ezinemincili zikhupha iifotoni phantsi kochulumanco lweefotoni zangaphandle, ezi fotoni zingcangcazela kwicala elinye (imeko yepolarization) njengeefotoni zangaphandle, evumela i-laser ukuba igcine imo ezinzileyo kunye neyodwa yepolarization. Nokuba utshintsho oluncinci kwimeko ye-polarization luya kuhluzwa yi-resonator kuba i-oscillations ezinzileyo ayinakusekwa.
Kweyona nkqubo yokuvelisa i-laser, i-wave plate kunye ne-polarization crystal zihlala zongezwa ngaphakathi kwe-laser ukulungisa imeko yozinzo ye-resonator, ukwenzela ukuba imeko ye-polarization kwi-cavity ihluke. Oku akugcini nje ukwenza amandla e-laser agxininise ngakumbi, ukusebenza kakuhle kwe-excitation kuphezulu, kodwa kunqanda ilahleko ebangelwa kukungakwazi ukujikeleza. Ke ngoko, imeko ye-polarization ye-laser ixhomekeke kwizinto ezininzi ezinje ngesakhiwo se-resonator, ubume bendawo yokuzuza kunye neemeko ze-oscillation, kwaye ayisoloko yodwa.
Ixesha lokuposa: Jun-17-2024