"Polarization" yog ib qho yam ntxwv ntawm ntau yam lasers, uas yog txiav txim siab los ntawm txoj cai tsim ntawm lub laser. Lublub teeb laseryog tsim los ntawm kev tsim hluav taws xob ntawm cov khoom me me uas tawm hauv lub teeblaser. Kev tawg hluav taws xob uas raug txhawb nqa muaj ib qho tshwj xeeb: thaum ib lub photon sab nraud ntaus ib lub khoom me me hauv lub xeev muaj zog dua, lub khoom me me ntawd yuav tawg ib lub photon thiab hloov mus rau lub xeev muaj zog dua. Cov photons uas tsim tawm hauv cov txheej txheem no muaj tib theem, kev taw qhia kev nthuav dav thiab lub xeev polarization zoo li cov photons txawv teb chaws. Thaum cov photon stream tsim nyob rau hauv lub laser, txhua lub photons hauv hom photon stream sib koom tib theem, kev taw qhia kev nthuav dav, thiab lub xeev polarization. Yog li ntawd, hom laser longitudinal (zaus) yuav tsum tau polarized.
Tsis yog txhua lub lasers yog polarized. Lub xeev polarization ntawm lub laser raug cuam tshuam los ntawm ntau yam, suav nrog:
1. Kev xav ntawm lub resonator: Yuav kom ntseeg tau tias ntau cov photons tau localized los tsim cov oscillations ruaj khov hauv qhov kab noj hniav thiab tsimlub teeb laser, qhov kawg ntawm lub resonator feem ntau yog plated nrog ib daim zaj duab xis reflection zoo dua. Raws li Fresnel txoj cai, qhov kev ua ntawm daim zaj duab xis multilayer ua rau lub teeb ci ntsa iab kawg hloov ntawm lub teeb ntuj mus rau linearlylub teeb polarized.
2. Cov yam ntxwv ntawm qhov nce nruab nrab: laser tiam yog raws li kev hluav taws xob stimulated. Thaum cov atoms excited radiates photons nyob rau hauv lub excitation ntawm txawv teb chaws photons, cov photons no co nyob rau hauv tib qho kev coj (polarization xeev) raws li txawv teb chaws photons, tso cai rau lub laser kom tswj tau lub xeev polarization ruaj khov thiab tshwj xeeb. Txawm tias qhov kev hloov pauv me me hauv lub xeev polarization yuav raug lim tawm los ntawm resonator vim tias cov oscillations ruaj khov tsis tuaj yeem tsim.
Hauv cov txheej txheem tsim khoom laser tiag tiag, cov phaj nthwv dej thiab cov siv lead ua polarization feem ntau yog ntxiv rau hauv lub laser los kho qhov ruaj khov ntawm lub resonator, yog li ntawd lub xeev polarization hauv qhov cavity yog qhov tshwj xeeb. Qhov no tsis yog tsuas yog ua rau lub zog laser ntau dua, qhov kev ua haujlwm excitation siab dua, tab sis kuj zam kev poob los ntawm qhov tsis muaj peev xwm oscillate. Yog li ntawd, lub xeev polarization ntawm lub laser nyob ntawm ntau yam xws li cov qauv ntawm lub resonator, qhov xwm txheej ntawm qhov nce nruab nrab thiab cov xwm txheej oscillation, thiab tsis yog ib txwm tshwj xeeb.
Lub sijhawm tshaj tawm: Lub Rau Hli-17-2024