"I-Polarization" luphawu oluqhelekileyo lwee-laser ezahlukeneyo, olumiselwa ngumgaqo wokwakheka kwe-laser.umqadi welaseriveliswa yimitha evuselelweyo yamasuntswana aphakathi akhupha ukukhanya ngaphakathiileza. Imisebe evuselelweyo ineempawu eziphawulekayo: xa i-photon yangaphandle ibetha isuntswana kwimeko yamandla aphezulu, isuntswana ikhupha i-photon ize itshintshele kwimeko yamandla aphantsi. Ii-photon eziveliswa kule nkqubo zinesigaba esifanayo, indlela yokusasazeka kunye nemeko yokuqhekeka njengee-photon zangaphandle. Xa umlambo we-photon wenziwa kwi-laser, zonke ii-photon kwi-mode photon stream zabelana ngesigaba esifanayo, indlela yokusasazeka, kunye nemeko yokuqhekeka. Ke ngoko, i-laser longitudinal mode (frequency) kufuneka i-polarized.
Ayizizo zonke iilaser ezi-polarized. Imeko ye-polarized yelaser ichatshazelwa zizinto ezininzi, kuquka:
1. Ukubonakaliswa kwe-resonator: Ukuqinisekisa ukuba ii-photon ezingaphezulu zibekwe kwindawo ethile ukuze zenze ukushukuma okuzinzileyo kwindawo engaphakathi kwaye kuveliseisibane selaser, ubuso bokugqibela be-resonator budla ngokugqunywa ngefilimu yokubonakalisa ephuculweyo. Ngokomthetho kaFresnel, isenzo sefilimu yokubonakalisa enezitezi ezininzi sibangela ukuba ukukhanya kokugqibela okubonakalisiweyo kutshintshe ukusuka ekukhanyeni kwendalo ukuya kumgca othe tye.ukukhanya okupholisiweyo.
2. Iimpawu ze-gain medium: ukuveliswa kwe-laser kusekelwe kwimitha evuselelweyo. Xa ii-athomu ezivuselelweyo zikhupha ii-photon phantsi koxinzelelo lwee-photon zangaphandle, ezi-photon zingcangcazela kwicala elifanayo (imeko ye-polarization) njengee-photon zangaphandle, zivumela i-laser ukuba igcine imeko ye-polarization ezinzileyo neyodwa. Nokuba utshintsho oluncinci kwimeko ye-polarization luya kuhluzwa yi-resonator kuba ukushukuma okuzinzileyo akunakwenzeka.
Kwinkqubo yokwenziwa kwe-laser, i-wave plate kunye ne-polarisation crystal zihlala zongezwa ngaphakathi kwe-laser ukulungisa imeko yozinzo lwe-resonator, ukuze imeko ye-polarization kwi-cavity ibe yodwa. Oku akwenzi nje kuphela amandla e-laser agxile ngakumbi, ukusebenza kakuhle kwe-excitation kuphezulu, kodwa kuthintela nokulahleka okubangelwa kukungakwazi ukushukuma. Ke ngoko, imeko ye-polarization ye-laser ixhomekeke kwizinto ezininzi ezifana nolwakhiwo lwe-resonator, uhlobo lwe-gain medium kunye neemeko ze-oscillation, kwaye ayisoloko ingaqhelekanga.
Ixesha leposi: Juni-17-2024