Quantum kev sib txuas lus: nqaim linewidth lasers

Kev sib txuas lus Quantum:nqaim linewidth lasers

Nqaim linewidth laseryog ib hom laser nrog tshwj xeeb kho qhov muag khoom, uas yog yus muaj los ntawm lub peev xwm los tsim ib tug laser beam nrog ib tug me me optical linewidth (uas yog, nqaim spectrum). Cov kab dav dav ntawm lub nqaim linewidth laser hais txog qhov dav ntawm nws cov spectrum, feem ntau qhia nyob rau hauv bandwidth nyob rau hauv ib chav tsev zaus, thiab qhov dav no kuj hu ua "spectral kab dav" los yog yooj yim "kab dav". Nqaim kab dav lasers muaj ib txoj kab nqaim dav, feem ntau yog nruab nrab ntawm ob peb puas kilohertz (kHz) thiab ob peb megahertz (MHz), uas yog me dua li cov kab dav dav ntawm cov pa lasers.

Classification los ntawm kab noj hniav:

1. Linear kab noj hniav fiber ntau lasers muab faib mus rau hauv faib Bragg reflection hom (DBR Laser) thiab faib tawm tswv yim hom (DFB Laser) ob tug qauv. Cov zis laser ntawm ob lub lasers yog coherent lub teeb nrog nqaim linewidth thiab qis suab nrov. DFB fiber ntau laser tuaj yeem ua tiav ob lub tswv yim laser thiablaserhom kev xaiv, yog li cov zis laser zaus stability yog qhov zoo, thiab nws yooj yim dua kom tau txais kev ruaj khov ib hom longitudinal tso zis.

2. Ring-cavity fiber lasers tso zis nqaim-dav lasers los ntawm kev qhia nqaim-band lim xws li Fabry-Perot (FP) cuam tshuam kab noj hniav, fiber ntau grating los yog sagnac nplhaib kab noj hniav rau hauv kab noj hniav. Txawm li cas los xij, vim qhov ntev ntawm cov kab noj hniav ntev, lub longitudinal hom ncua sij hawm yog me me, thiab nws yooj yim rau dhia hom nyob rau hauv kev cuam tshuam ntawm ib puag ncig, thiab kev ruaj ntseg tsis zoo.

Khoom siv:

1. Optical sensor nqaim-dav laser ua lub teeb pom kev zoo rau cov khoom siv fiber ntau, los ntawm kev sib txuas nrog cov khoom siv fiber ntau, tuaj yeem ua tiav qhov kev ntsuas siab, siab-rhiab heev. Piv txwv li, nyob rau hauv lub siab los yog kub fiber optic sensors, lub stability ntawm lub nqaim linewidth laser pab kom paub tseeb tias qhov tseeb ntawm qhov ntsuas.

2. High-resolution spectral ntsuas Qhov nqaim linewidth lasers muaj qhov nqaim spectral kab dav heev, ua rau lawv zoo tagnrho qhov chaw rau high-resolution spectrometers. Los ntawm xaiv txoj cai wavelength thiab linewidth, nqaim linewidth lasers yuav siv tau rau qhov tseeb spectral tsom xam thiab ntsuas spectral. Piv txwv li, nyob rau hauv cov pa sensors thiab ib puag ncig saib xyuas, nqaim linewidth lasers yuav siv tau los ua kom tiav qhov tseeb ntsuas ntawm optical absorption, optical emission thiab molecular spectra nyob rau hauv cov huab cua.

3. Lidar ib zaus nqaim kab-dav fiber ntau lasers kuj muaj cov ntawv thov tseem ceeb heev hauv liDAR lossis laser ranging systems. Siv ib zaug ib zaug nqaim kab dav fiber ntau laser raws li lub teeb pom kev, ua ke nrog optical coherence nrhiav kom tau, nws tuaj yeem tsim qhov deb (ntau pua mais) liDAR lossis rangefinder. Lub hauv paus ntsiab lus no muaj tib txoj hauv kev ua haujlwm raws li OFDR thev naus laus zis hauv kev kho qhov muag fiber ntau, yog li nws tsis tsuas yog muaj kev daws teeb meem loj heev, tab sis kuj tuaj yeem nce qhov ntsuas qhov deb. Nyob rau hauv no system, lub laser spectral kab dav los yog coherence ntev txiav txim siab qhov kev ncua deb ntawm qhov ntsuas thiab ntsuas qhov tseeb, yog li qhov zoo dua qhov coherence ntawm lub teeb ci, qhov ua tau zoo ntawm tag nrho lub cev.