Nqaim Linewidth Laser Technology Part 2
Nyob rau hauv 1960, lub ntiaj teb thawj ruby laser yog ib tug solid-state laser, tus yam ntxwv los ntawm lub siab tso zis zog thiab ib tug dav wavelength kev pab them nqi.Qhov tshwj xeeb spatial qauv ntawm solid-state laser ua rau nws yooj yim dua nyob rau hauv tus tsim ntawm nqaim linewidth tso zis.Tam sim no, cov kev siv tseem ceeb suav nrog txoj kab noj hniav luv luv, ib txoj kev nplhaib kab noj hniav, txoj hauv kev intracavity, torsion pendulum hom kab noj hniav txoj kev, ntim Bragg grating txoj kev thiab cov noob txhaj tshuaj.
Daim duab 7 qhia txog cov qauv ntawm ntau yam ib leeg-longitudinal hom solid-state lasers.
Daim duab 7(a) qhia txog kev ua haujlwm ntawm ib qho kev xaiv longitudinal hom raws li hauv-kab noj hniav FP tus qauv, uas yog, nqaim linewidth kis tau tus mob spectrum ntawm tus qauv yog siv los ua kom poob ntawm lwm hom longitudinal, kom lwm hom longitudinal yog lim tawm nyob rau hauv cov txheej txheem kev sib tw hom vim lawv qhov me me transmittance, thiaj li ua tiav ib hom longitudinal kev ua haujlwm.Tsis tas li ntawd, qee qhov ntawm qhov kev tso tawm wavelength tuaj yeem tau txais los ntawm kev tswj lub kaum sab xis thiab qhov kub thiab txias ntawm FP tus qauv thiab hloov lub sijhawm ntev ntawm hom.FIG.7(b) thiab (c) qhia qhov tsis yog-planar nplhaib oscillator (NPRO) thiab torsional pendulum kab noj hniav txoj kev siv kom tau txais ib qho kev tso tawm ntev ntev.Lub hauv paus ntsiab lus ntawm kev ua haujlwm yog ua kom cov nqaj propagated nyob rau hauv ib qho kev taw qhia nyob rau hauv lub resonator, zoo tshem tawm qhov tsis sib xws spatial faib ntawm tus naj npawb ntawm reversed hais nyob rau hauv lub dog dig sawv yoj kab noj hniav, thiab yog li tsis txhob cuam tshuam lub spatial qhov kub kub nyhuv kom ua tau ib tug ib leeg longitudinal hom tso zis.Lub hauv paus ntsiab lus ntawm bulk Bragg grating (VBG) hom xaiv zoo ib yam li cov semiconductor thiab fiber ntau nqaim-dav lasers tau hais ua ntej, uas yog, los ntawm kev siv VBG ua lub lim dej, raws li nws cov kev xaiv zoo spectral thiab lub kaum sab xis xaiv, lub oscillator oscillates ntawm ib lub wavelength tshwj xeeb los yog band kom ua tiav lub luag hauj lwm ntawm longitudinal hom xaiv, raws li qhia nyob rau hauv daim duab 7(d).
Nyob rau tib lub sijhawm, ntau txoj hauv kev xaiv longitudinal tuaj yeem ua ke raws li kev xav tau los txhim kho qhov kev xaiv longitudinal hom raug, txuas ntxiv nqaim txoj kab, los yog ua kom muaj kev sib tw hom kev sib tw los ntawm kev qhia txog kev hloov pauv tsis hloov pauv thiab lwm yam, thiab nthuav tawm cov zis wavelength ntawm lub laser thaum ua hauj lwm nyob rau hauv ib tug nqaim linewidth, uas yog nyuaj rau uasemiconductor laserthiabfiber ntau lasers.
(4) Brillouin laser
Brillouin laser yog ua raws li kev txhawb nqa Brillouin scattering (SBS) cov nyhuv kom tau txais cov suab nrov qis, nqaim linewidth tso zis tshuab, nws cov ntsiab lus yog los ntawm photon thiab sab hauv acoustic teb kev sib cuam tshuam los tsim ib qho kev hloov pauv ntawm Stokes photons, thiab txuas ntxiv mus rau hauv lub nce bandwidth.
Daim duab 8 qhia txog daim duab theem ntawm SBS hloov dua siab tshiab thiab cov qauv yooj yim ntawm Brillouin laser.
Vim tias qhov tsis tshua muaj kev vibration ntawm lub acoustic teb, Brillouin zaus hloov ntawm cov khoom feem ntau tsuas yog 0.1-2 cm-1, yog li nrog 1064 nm laser li lub teeb lub teeb, Stokes wavelength generated feem ntau tsuas yog hais txog 1064.01 nm, tab sis. qhov no kuj txhais tau hais tias nws cov quantum conversion efficiency siab heev (txog 99.99% hauv txoj kev xav).Tsis tas li ntawd, vim tias Brillouin nce linewidth ntawm qhov nruab nrab feem ntau tsuas yog ntawm qhov kev txiav txim ntawm MHZ-ghz (Brillouin nce linewidth ntawm qee cov khoom siv xov xwm tsuas yog kwv yees li 10 MHz), nws yog deb tshaj qhov nce linewidth ntawm cov khoom siv laser. ntawm qhov kev txiav txim ntawm 100 GHz, yog li, Lub Stokes zoo siab nyob rau hauv Brillouin laser tuaj yeem pom pom tseeb spectrum nqaim tshwm sim tom qab ntau qhov kev nthuav dav hauv cov kab noj hniav, thiab nws cov kab tawm qhov dav yog ntau qhov kev txiav txim ntawm qhov loj dua qhov dav ntawm lub twj tso kua mis.Tam sim no, Brillouin laser tau dhau los ua qhov kev tshawb fawb hotspot hauv photonics teb, thiab tau muaj ntau cov lus ceeb toom ntawm Hz thiab sub-Hz kev txiav txim ntawm cov khoom nqaim heev.
Nyob rau hauv xyoo tas los no, Brillouin cov khoom siv nrog cov qauv waveguide tau tshwm sim hauv thaj tsam ntawmmicrowave photonics, thiab tab tom loj hlob sai nyob rau hauv cov kev taw qhia ntawm miniaturization, siab integration thiab siab dua daws teeb meem.Tsis tas li ntawd, qhov chaw ua haujlwm Brillouin laser raws li cov ntaub ntawv siv lead ua tshiab xws li pob zeb diamond kuj tau nkag mus rau tib neeg lub zeem muag hauv ob xyoos dhau los, nws txoj kev hloov tshiab hauv lub zog ntawm cov qauv waveguide thiab cascade SBS bottleneck, lub zog ntawm Brillouin laser. mus rau 10 W magnitude, tso lub hauv paus rau nthuav nws daim ntawv thov.
Kev sib tshuam
Nrog rau kev tshawb nrhiav tsis tu ncua ntawm kev paub txog kev paub, nqaim linewidth lasers tau dhau los ua cov cuab yeej tseem ceeb hauv kev tshawb fawb tshawb fawb nrog lawv cov kev ua tau zoo, xws li laser interferometer LIGO rau gravitational yoj nrhiav kom tau, uas siv ib zaug ib zaug nqaim linewidth.lasernrog lub wavelength ntawm 1064 nm raws li lub noob qhov chaw, thiab linewidth ntawm noob lub teeb nyob rau hauv 5 kHz.Tsis tas li ntawd, nqaim-dav lasers nrog wavelength tunable thiab tsis muaj hom dhia kuj qhia tau hais tias muaj peev xwm siv tau zoo, tshwj xeeb tshaj yog nyob rau hauv kev sib txuas lus, uas tuaj yeem ua tau raws li qhov xav tau ntawm wavelength division multiplexing (WDM) lossis zaus division multiplexing (FDM) rau wavelength (los yog zaus. ) tunability, thiab xav tias yuav dhau los ua cov cuab yeej tseem ceeb ntawm cov tiam tom ntej ntawm kev sib txuas lus mobile.
Nyob rau hauv lub neej yav tom ntej, kev tsim kho tshiab ntawm cov ntaub ntawv laser thiab kev siv thev naus laus zis yuav txhawb nqa compression ntawm laser linewidth, kev txhim kho ntawm zaus stability, nthuav dav ntawm wavelength ntau thiab kev txhim kho lub zog, paving txoj kev rau tib neeg kev tshawb nrhiav ntawm lub ntiaj teb tsis paub.
Post lub sij hawm: Nov-29-2023