"Polarization" yog ib tug yam ntxwv ntawm ntau yam lasers, uas yog txiav txim los ntawm kev tsim lub hauv paus ntsiab lus ntawm lub laser. Covlaser nqajyog tsim los ntawm stimulated tawg ntawm lub teeb-emitting nruab nrab hais nyob rau hauv lublaser. Lub zog hluav taws xob muaj cov yam ntxwv zoo tshaj plaws: thaum lub photon sab nraud hits ib qho hauv lub zog siab dua, cov particle radiates photon thiab hloov mus rau lub zog qis dua. Cov photons uas tsim nyob rau hauv cov txheej txheem no muaj tib theem, propagation kev taw qhia thiab polarization xeev raws li txawv teb chaws photons. Thaum lub photon kwj tsim nyob rau hauv ib lub laser, tag nrho cov photons nyob rau hauv ib hom photon kwj qhia tib theem, propagation kev taw qhia, thiab polarization xeev. Yog li ntawd, lub laser longitudinal hom (ntau 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: Txhawm rau kom ntseeg tau tias ntau cov photons nyob hauv cheeb tsam los tsim cov oscillations ruaj khov hauv cov kab noj hniav thiab tsim kom muajlaser teeb, lub ntsej muag kawg ntawm lub resonator feem ntau yog plated nrog cov yeeb yaj kiab ua kom zoo dua qub. Raws li Fresnel txoj cai, qhov kev txiav txim ntawm multilayer reflective zaj duab xis ua rau lub teeb pom kev kawg hloov los ntawm lub teeb ntuj mus rau linearly.polarized teeb.
2. Cov yam ntxwv ntawm qhov nce nruab nrab: laser tiam yog raws li kev txhawb nqa hluav taws xob. Thaum zoo siab atoms radiate photons nyob rau hauv lub excitation ntawm txawv teb chaws photons, cov photons vibrate nyob rau hauv tib txoj kev (polarization xeev) raws li txawv teb chaws photons, tso cai rau lub laser kom muaj ib tug ruaj khov thiab cim polarization xeev. Txawm tias me me hloov pauv hauv lub xeev polarization yuav raug lim tawm los ntawm tus resonator vim tias tsis muaj zog oscillations tsis tuaj yeem tsim.
Nyob rau hauv cov txheej txheem tsim laser tiag tiag, yoj phaj thiab polarization siv lead ua feem ntau yog ntxiv rau hauv lub laser los kho qhov kev ruaj ntseg ntawm lub resonator, kom lub xeev polarization hauv kab noj hniav yog qhov tshwj xeeb. Qhov no tsis tsuas yog ua rau lub zog laser ntau concentrated, excitation efficiency siab dua, tab sis kuj zam qhov poob los ntawm kev 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 ntawm qhov nce nruab nrab thiab oscillation tej yam kev mob, thiab tsis yog ib txwm cim.
Post lub sij hawm: Jun-17-2024