Cov Qauv Ntawm Laser

1. Laser ua haujlwm nruab nrab


Lub tshuab hluav taws xob laser yuav tsum xaiv cov khoom ua haujlwm haum nruab nrab, xws li roj, kua, khoom lossis semiconductor. Nyob rau hauv qhov nruab nrab, cov particle tooj inversion yuav pom tau hais los tsim tus tsim nyog mob rau muab laser. Pom tseeb, muaj lub zog ntawm metastable ntau ntau lub zog tau txais txiaj ntsig zoo heev rau qhov paub ntawm particle inversion. Qhov nruab nrab ua haujlwm tam sim no muaj ze li ntawm 1000 hom, thiab lub teeb hluav taws xob laser tuaj yeem tsim los ntawm lub tshuab nqus ultraviolet deb infrared.


2. Ji Liyuan


Txhawm rau ua kom cov particle naj npawb rov qab rau hauv qhov nruab nrab ua haujlwm, peb yuav tsum siv qee txoj kev los txhawb qhov atomic system thiab nce tus lej ntawm qhov sib npaug ntawm qib theem. Feem ntau, kev tso tawm roj tawm tuaj yeem siv lub zog kev siv hluav taws xob ua kom zoo siab rau nruab nrab atoms, hu ua hluav taws xob excitation, thiab tseem tuaj yeem siv rau qhov tsis ua haujlwm ntawm qhov nruab nrab ua haujlwm, paub tias yog lub teeb excitation, thiab thermal excitation, chemical excitation thiab lwm yam. Txhua yam kev tiv thaiv pom zoo li pom tias yog nqus lossis nqus. Nyob rau hauv thiaj li yuav tau laser tso zis tsis tu ncua, peb yuav tsum lossi tso kom muaj ntau hais nyob rau sab sauv npaum li cov theem sab.


3. Lub tshuaj ntsuas zog


Nrog kom zoo ua hauj lwm cov ntaub ntawv thiab excitation qhov chaw, lub particle tooj inversion yuav pom tau hais, tab sis cov stimulated emission siv generated los ntawm cov qauv no yog heev tsis muaj zog thiab yuav tsis muaj ntaub ntawv suab. Yog li ntawd cov neeg xav li cas txog amplifying nrog kho qhov muag resonators. Lub thiaj li hu ua kho qhov muag resonator yog ua tau nyob rau ntawm ob hnub ntawm lub laser, thiab ob reflectivity tsom iav yog mounted rau lub ntsej muag-rau-lub ntsej muag. Ib daim ntawm yuav luag tag nrho cov rog xav txog, ib daim ntawm lub teeb yog feem ntau reflected thiab kis tau ib tug me ntsis, yog li ntawd lub laser yuav tawm txim liab los ntawm no daim iav. Lub teeb ua rau rov qab mus rau qhov nruab nrab ua haujlwm txuas ntxiv mus ntxias cov kev tawm tshiab thiab qhov ua kom nrov ntxiv. Raws li ib tug tshwm sim, lub teeb oscillates rov qab thiab tawm nyob rau hauv lub resonator, ua ib cov saw tshuaj tiv thaiv. Cov av av yog qhov tshwj xeeb ntxiv, ua rau kom muaj qhov ua tau zoo ntawm laser los ntawm cov ntu ntawm daim iav.