"Polarization" ihunhu hwakajairika hwema laser akasiyana-siyana, ayo anotsanangurwa nepfungwa yekuumbwa kwe laser.danda relaserinogadzirwa nemwaranzi inomutswa yezvikamu zvepakati zvinoburitsa chiedza mukatilaser. Mwaranzi inosimudzirwa ine hunhu hunoshamisa: kana photon yekunze ikarova chidimbu chiri mumamiriro esimba rakakwirira, chidimbu chinoburitsa photon uye chinoshanduka kuenda kumamiriro esimba rakaderera. Ma photon anogadzirwa mukuita uku ane phase imwechete, nzira yekupararira uye mamiriro epolarization semamwe ma photon. Kana rwizi rwe photon rwukaumbwa mu laser, ma photon ese ari mu mode photon stream ane chikamu chimwe chete, nzira yekupararira, uye mamiriro epolarization. Nokudaro, laser longitudinal mode (frequency) inofanira kuparadzaniswa.
Haasi ese ma laser ane polarized. Mamiriro e polarization ye laser anokanganiswa nezvinhu zvakawanda, zvinosanganisira:
1. Kuratidzwa kwe resonator: Kuti pave nechokwadi chekuti ma photon akawanda ari munzvimbo imwe chete kuti agadzire kutenderera kwakasimba mugomba uye kugadzirachiedza chelaser, kumucheto kwe resonator kunowanzo putirwa nefirimu rekuwedzera reflection. Zvinoenderana nemutemo waFresnel, chiito chefirimu reflective reflection rine layer yakawanda chinoita kuti chiedza chekupedzisira che reflection chishanduke kubva kuchiedza chechisikigo kuenda kune linearly.chiedza chakaparadzaniswa.
2. Hunhu hwe gain medium: kugadzirwa kwelaser kunobva pamwaranzi inosimudzirwa. Kana maatomu anofara achiburitsa maphoton pasi pekusimudzirwa kwemaphoton ekunze, maphoton aya anodedera nenzira imwechete (polarization state) semaphoton ekunze, zvichibvumira laser kuchengetedza polarization state yakagadzikana uye yakasiyana. Kunyangwe shanduko diki mu polarization state dzichaseferwa ne resonator nekuti stable oscillations haigoni kuumbwa.
Mukugadzirwa kwelaser chaiyo, wave plate ne polarization crystal zvinowanzo wedzerwa mukati melaser kugadzirisa mamiriro ekugadzikana kwe resonator, kuitira kuti polarization state mu cavity ive yakasiyana. Izvi hazvingoiti kuti simba relaser riwedzere kusimba, efficiation efficiency yakakwira, asiwo zvinodzivirira kurasikirwa kunokonzerwa nekusakwanisa kutenderera. Nokudaro, polarization state yelaser inoenderana nezvinhu zvakawanda zvakaita sechimiro che resonator, hunhu hwe gain medium uye oscillation conditions, uye haisi nguva dzose yakasiyana.
Nguva yekutumira: Chikumi-17-2024