Kev tshawb fawb tshiab ntawmnqaim-linewidth laser
Nqaim-linewidth laser yog qhov tseem ceeb nyob rau hauv ntau yam kev siv xws li precision sensing, spectroscopy, thiab quantum science. Ntxiv rau qhov dav spectral, spectral duab kuj yog ib qho tseem ceeb, uas nyob ntawm daim ntawv thov scenario. Piv txwv li, lub zog ntawm ob sab ntawm cov kab laser yuav qhia txog qhov yuam kev hauv kev kho qhov muag ntawm qubits thiab cuam tshuam qhov tseeb ntawm atomic moos. Nyob rau hauv cov nqe lus ntawm lub suab nrov laser, cov Fourier Cheebtsam tsim los ntawm spontaneous hluav taws xob nkag mus rau hauv lublaserhom feem ntau yog siab tshaj 105 Hz, thiab cov khoom no txiav txim siab qhov amplitudes ntawm ob sab ntawm kab. Kev sib koom ua ke ntawm Henry li qhov tseem ceeb thiab lwm yam, qhov txwv quantum, uas yog Schawlow-Townes (ST) txwv, tau txhais. Tom qab tshem tawm cov suab nrov xws li kab noj hniav kev co thiab qhov ntev drift, qhov kev txwv no txiav txim siab qhov qis qis ntawm qhov ua tiav txoj kab dav dav. Yog li ntawd, txo qis quantum suab nrov yog ib kauj ruam tseem ceeb hauv kev tsimnqaim-linewidth lasers.
Tsis ntev los no, cov kws tshawb fawb tau tsim cov thev naus laus zis tshiab uas tuaj yeem txo qhov linewidth ntawm cov kab teeb laser ntau dua kaum txhiab zaus. Qhov kev tshawb fawb no tuaj yeem hloov pauv tag nrho ntawm kev suav quantum, moos atomic thiab kuaj pom nthwv dej. Pab pawg tshawb fawb tau siv lub hauv paus ntsiab lus ntawm kev txhawb nqa Raman tawg ua kom cov lasers ua kom muaj kev vibrations ntau dua hauv cov khoom. Cov nyhuv ntawm txoj kab dav dav yog ntau txhiab lub sij hawm siab dua li cov txheej txheem ib txwm muaj. Qhov tseem ceeb, nws yog qhov sib npaug rau kev tawm tswv yim tshiab laser spectral purification thev naus laus zis uas tuaj yeem siv rau ntau hom kev tawm tswv yim lasers. Qhov no sawv cev rau ib qho tseem ceeb ntawm kev ua haujlwm hauv thaj chaw ntawmlaser tshuab.
Cov cuab yeej tshiab no tau daws qhov teeb meem ntawm feeb random lub teeb yoj lub sijhawm hloov pauv uas ua rau lub purity thiab raug ntawm cov kab teeb laser poob. Nyob rau hauv ib qho zoo tagnrho laser, txhua lub teeb nthwv dej yuav tsum tau ua kom zoo kawg nkaus - tab sis qhov tseeb, qee lub teeb nthwv dej me ntsis ua ntej lossis tom qab lwm tus, ua rau muaj kev hloov pauv hauv theem ntawm lub teeb. Cov kev hloov pauv theem no ua rau "lub suab nrov" hauv lub laser spectrum - lawv plam lub laser zaus thiab txo nws cov xim purity. Lub hauv paus ntsiab lus ntawm Raman thev naus laus zis yog tias los ntawm kev hloov cov teeb meem ntawm lub cev mus rau hauv kev vibrations nyob rau hauv lub pob zeb diamond siv lead ua, cov kev vibrations yog sai absorbed thiab dissipated (nyob rau hauv ob peb trillionths ntawm ib tug thib ob). Qhov no ua rau lub teeb tsis muaj zog ntxiv kom muaj zog oscillations, yog li ua tiav spectral purity siab dua thiab ua rau muaj kev cuam tshuam loj ntawm covlaser spectrum.
Post lub sij hawm: Aug-04-2025