Cov kev tshawb fawb tshiab tshaj plaws ntawm cov lasers semiconductor ob xim

Cov kev tshawb fawb tshiab tshaj plaws ntawm cov lasers semiconductor ob xim

Cov tshuab semiconductor disc lasers (SDL lasers), tseem hu ua cov tshuab vertical external cavity surface-emitting lasers (VECSEL), tau nyiam ntau lub siab nyob rau xyoo tas los no. Nws muab cov txiaj ntsig ntawm semiconductor gain thiab solid-state resonators ua ke. Nws tsis tsuas yog ua kom yooj yim rau qhov kev txwv ntawm thaj chaw tso tawm ntawm kev txhawb nqa ib hom rau cov tshuab semiconductor ib txwm muaj, tab sis kuj tseem muaj cov qauv tsim semiconductor bandgap yooj ywm thiab cov yam ntxwv siab ntawm cov khoom siv. Nws tuaj yeem pom hauv ntau yam kev siv, xws li suab nrov qis.laser kab nqaimcov zis, ultra-luv high-repetition pulse generation, high-order harmonic generation, thiab sodium guide star technology, thiab lwm yam. Nrog rau kev nce qib ntawm thev naus laus zis, cov kev xav tau siab dua tau muab tso rau pem hauv ntej rau nws qhov kev hloov pauv wavelength. Piv txwv li, dual-wavelength coherent light sources tau ua pov thawj tias muaj txiaj ntsig zoo heev rau kev siv hauv cov teb tshiab xws li anti-interference lidar, holographic interferometry, wavelength division multiplexing communication, mid-infrared lossis terahertz generation, thiab multi-color optical frequency combs. Yuav ua li cas kom ua tiav high-brightness dual-color emission hauv semiconductor disc lasers thiab ua kom zoo suppress gain competition ntawm ntau wavelengths yeej ib txwm yog qhov nyuaj tshawb fawb hauv daim teb no.

Tsis ntev los no, ib qho xim ob ximlaser semiconductorPab neeg hauv Suav teb tau tawm tswv yim tsim cov chip tshiab los daws qhov teeb meem no. Los ntawm kev tshawb fawb txog lej tob tob, lawv pom tias kev tswj hwm qhov kub thiab txias ntawm quantum well gain filtering thiab semiconductor microcavity filtering effects yuav ua tiav kev tswj hwm ntawm dual-color gain. Raws li qhov no, pab neeg tau tsim lub 960/1000 nm high-brightness gain chip. Lub laser no ua haujlwm hauv hom yooj yim ze ntawm qhov txwv diffraction, nrog rau qhov ci ntsa iab siab txog li 310 MW / cm²sr.

Lub txheej nce ntawm lub semiconductor disc tsuas yog ob peb micrometers tuab xwb, thiab Fabry-Perot microcavity tau tsim ntawm lub semiconductor-air interface thiab lub hauv qab faib Bragg reflector. Kev kho lub semiconductor microcavity ua lub lim dej spectral ua ke ntawm lub chip yuav hloov kho qhov nce ntawm lub qhov dej quantum. Lub caij no, cov nyhuv lim dej microcavity thiab semiconductor nce muaj cov nqi kub sib txawv. Ua ke nrog kev tswj kub, kev hloov pauv thiab kev tswj hwm ntawm cov zis wavelengths tuaj yeem ua tiav. Raws li cov yam ntxwv no, pab pawg tau xam thiab teeb tsa qhov nce siab ntawm lub qhov dej quantum ntawm 950 nm ntawm 300 K kub, nrog rau qhov kub thiab txias ntawm qhov nce wavelength yog kwv yees li 0.37 nm / K. Tom qab ntawd, pab pawg tau tsim cov khoom txwv ntev ntawm lub chip siv txoj kev sib kis matrix, nrog rau qhov siab tshaj plaws ntawm kwv yees li 960 nm thiab 1000 nm feem. Kev simulations qhia tau hais tias qhov kub thiab txias tsuas yog 0.08 nm / K. Los ntawm kev siv cov txheej txheem tso pa tshuaj lom neeg hlau-organic rau kev loj hlob epitaxial thiab txuas ntxiv ua kom zoo dua cov txheej txheem loj hlob, cov chips zoo tau ua tiav. Cov txiaj ntsig ntsuas ntawm photoluminescence yog sib xws nrog cov txiaj ntsig simulation. Txhawm rau kom txo qhov kev thauj khoom thermal thiab ua tiav kev sib kis hluav taws xob siab, cov txheej txheem ntim khoom semiconductor-diamond chip tau tsim kho ntxiv.

Tom qab ua tiav cov ntim khoom ntawm lub chip, pab neeg tau ua qhov kev ntsuam xyuas tag nrho ntawm nws cov kev ua haujlwm laser. Hauv hom kev ua haujlwm tas mus li, los ntawm kev tswj lub zog twj tso kua mis lossis qhov kub ntawm lub dab dej kub, qhov wavelength ntawm lub teeb tuaj yeem hloov kho tau yooj yim ntawm 960 nm thiab 1000 nm. Thaum lub zog twj tso kua mis nyob hauv ib qho ntau yam, lub laser kuj tseem tuaj yeem ua tiav kev ua haujlwm ob-wavelength, nrog rau qhov sib txawv ntawm wavelength txog li 39.4 nm. Lub sijhawm no, lub zog nthwv dej tas mus li siab tshaj plaws ncav cuag 3.8 W. Lub caij no, lub laser ua haujlwm hauv hom yooj yim ze ntawm qhov txwv diffraction, nrog rau qhov zoo ntawm lub teeb M² ntawm tsuas yog 1.1 thiab qhov ci ntsa iab siab txog li 310 MW / cm²sr. Pab neeg kuj tau ua kev tshawb fawb txog kev ua haujlwm nthwv dej quasi-txuas ntxiv ntawmlaserLub teeb liab zaus sib sau ua ke tau pom zoo los ntawm kev ntxig lub LiB₃O₅ nonlinear optical crystal rau hauv lub resonant cavity, lees paub qhov kev sib dhos ntawm ob lub wavelengths.

Los ntawm qhov kev tsim chip ingenious no, kev sib xyaw ua ke ntawm quantum well gain filtering thiab microcavity filtering tau ua tiav, tsim lub hauv paus tsim rau kev paub txog cov xim laser ob xim. Hauv cov ntsuas kev ua tau zoo, lub laser ib leeg-chip dual-xim no ua tiav qhov ci ntsa iab siab, yooj ywm siab thiab cov zis coaxial beam meej. Nws qhov ci ntsa iab yog nyob rau theem thoob ntiaj teb ua tus thawj coj hauv thaj chaw tam sim no ntawm ib leeg-chip dual-color semiconductor lasers. Hauv kev siv tau, qhov kev ua tiav no xav tias yuav txhim kho qhov tseeb ntawm kev kuaj pom thiab kev cuam tshuam ntawm ntau-xim lidar hauv cov chaw nyuaj los ntawm kev siv nws qhov ci ntsa iab siab thiab cov yam ntxwv ob-xim. Hauv thaj chaw ntawm cov khoom siv zaus optical combs, nws cov zis dual-wavelength ruaj khov tuaj yeem muab kev txhawb nqa tseem ceeb rau cov ntawv thov xws li kev ntsuas spectral meej thiab kev daws teeb meem optical sensing.