Nyob rau hauv lub tshav pob ntawm high-power lasers, laser tuav yog indispensable core Cheebtsam. Tsis tsuas yog lawv ua hauj lwm raws li lub hauv paus units ntawm lub zog tso zis, tab sis lawv kuj embody lub precision thiab kev koom ua ke ntawm niaj hnub optoelectronic engineering.—khwv tau lawv lub npe menyuam yaus: "lub cav" ntawm laser tshuab. Tab sis dab tsi raws nraim yog cov qauv ntawm lub laser bar, thiab yuav ua li cas xa tawm kaum lossis ntau pua watts ntawm cov zis los ntawm ob peb millimeters loj? Tsab ntawv xov xwm no tshawb txog lub hauv paus architecture thiab engineering secrets qab laser tuav.
1. Dab tsi yog Laser Bar?
Ib lub laser bar yog ib lub tshuab hluav taws xob muaj zog uas tsim los ntawm ntau lub laser diode chips tom qab teem rau ntawm ib qho substrate. Thaum nws txoj haujlwm ua haujlwm zoo ib yam li ntawm ib qho semiconductor laser, lub laser bar siv ntau lub emitter layout kom ua tiav lub zog kho qhov muag ntau dua thiab ntau daim ntawv cog lus.
Laser tuav tau dav siv thoob plaws hauv kev lag luam, kev kho mob, kev tshawb fawb, thiab kev tiv thaiv, xws li cov khoom siv hluav taws xob ncaj qha lossis ua cov twj tso kua mis rau fiber ntau lasers thiab solid-state lasers.
2. Cov qauv tsim ntawm lub Laser Bar
Cov qauv sab hauv ntawm lub laser bar ncaj qha txiav txim siab nws qhov kev ua tau zoo. Nws feem ntau muaj cov ntsiab lus hauv qab no:
①Emitters Array
Laser tuav feem ntau muaj 10 mus rau 100 emitters (laser kab noj hniav) teem ib sab. Txhua emitter yog hais txog 50-150μm dav thiab ua raws li thaj chaw muaj kev ywj pheej, muaj PN hlws ris, kab noj hniav resonant, thiab waveguide qauv tsim thiab emit laser teeb. Thaum tag nrho cov emitters sib koom tib lub substrate, lawv feem ntau yog tsav hluav taws xob nyob rau hauv parallel los yog ib cheeb tsam.
②Semiconductor Txheej Txheej Txheem
Nyob rau hauv lub plawv ntawm lub laser bar yog ib pawg ntawm semiconductor txheej, xws li:
- P-hom thiab N-hom epitaxial txheej (ua rau PN kev sib tshuam)
- active txheej (xws li, quantum zoo qauv), uas generates stimulated emission
- Waveguide txheej, kom ntseeg tau hom kev tswj nyob rau hauv lateral thiab ntsug
- Bragg reflectors lossis HR / AR txheej, uas txhim kho cov kev taw qhia ntawm lub laser
③Substrate thiab Thermal Management Structure
Cov emitters yog zus nyob rau hauv ib tug monolithic semiconductor substrate (feem ntau GaAs). Rau kev ua kom muaj cua sov kom zoo, lub laser bar yog soldered mus rau high-conductivity submounts xws li tooj liab, W-Cu alloy, los yog CVD pob zeb diamond, thiab ua ke nrog kub dab dej thiab active cua txias tshuab.
④Emission Surface thiab Collimation System
Vim muaj qhov sib txawv loj ntawm cov kab hluav taws xob tso tawm, cov khoom siv laser feem ntau yog nruab nrog micro-lens arrays (FAC / SAC) rau kev sib tsoo thiab nqaj shaping. Rau qee yam kev siv, ntxiv optics—xws li cylindrical lo ntsiab muag lossis prisms—yog siv los tswj kev sib txawv ntawm qhov deb thiab kab teeb.
3. Cov yam ntxwv tseem ceeb cuam tshuam rau kev ua tau zoo
Cov qauv ntawm lub laser bar plays lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws txoj kev ruaj ntseg, kev ua tau zoo, thiab kev pabcuam lub neej. Ntau qhov tseem ceeb suav nrog:
①Thermal Management Design
Laser tuav muaj lub zog ceev ceev thiab muaj zog kub. Tsawg thermal tsis kam yog qhov tseem ceeb, ua tiav los ntawm AuSn soldering lossis indium bonding, ua ke nrog microchannel txias rau cov cua sov tsis sib xws.
②Beam Shaping thiab Alignment
Ntau tus emitters feem ntau raug kev txom nyem los ntawm kev sib raug zoo tsis zoo thiab kev sib tw wavefront misalignment. Precision lens tsim thiab kho kom haum yog qhov tseem ceeb rau kev txhim kho cov kab teeb nyob deb.
③Kev tswj kev ntxhov siab thiab kev ntseeg siab
Cov khoom tsis sib haum xeeb hauv thermal expansion coefficient tuaj yeem ua rau warping lossis microcracks. Ntim yuav tsum tau tsim los faib cov neeg kho tshuab kev nyuaj siab tusyees thiab tiv taus thermal cycling yam tsis muaj degradation.
4. Yav tom ntej Trends hauv Laser Bar Tsim
Raws li qhov kev thov rau lub zog siab dua, qhov loj me, thiab kev ntseeg siab ntau dua, cov qauv laser bar txuas ntxiv mus. Cov lus qhia tseem ceeb ntawm kev txhim kho muaj xws li:
①Wavelength Expansion: Txuas mus rau 1.5μm thiab mid-infrared bands
②Miniaturization: Ua kom siv tau hauv cov khoom siv compact thiab cov khoom siv sib xyaw ua ke
③Smart Packaging: Incorporating temperature sensors and status feedback systems
④High-Density Stacking: Layered arrays kom ua tiav kilowatt-theem tso zis nyob rau hauv ib tug compact hneev taw
5. Cov lus xaus
Raws li cov“plawv”ntawm high-power laser systems, cov qauv tsim ntawm laser tuav ncaj qha cuam tshuam qhov muag, hluav taws xob, thiab thermal kev ua tau zoo ntawm tag nrho cov system. Kev koom ua ke kaum ob ntawm cov emitters rau hauv cov qauv tsuas yog millimeters dav tsis tsuas yog nthuav tawm cov khoom siv siab heev thiab cov txheej txheem tsim, tab sis kuj sawv cev rau qib siab ntawm kev koom ua ke niaj hnub no.'s photonics kev lag luam.
Saib ua ntej, raws li qhov kev thov kom muaj txiaj ntsig zoo, txhim khu kev qha laser qhov chaw txuas ntxiv nce, kev tsim kho tshiab hauv laser bar qauv yuav tseem yog tus tsav tsheb tseem ceeb hauv kev nce qib kev lag luam laser mus rau qhov siab tshiab.
Yog koj'rov nrhiav cov kws tshaj lij kev txhawb nqa hauv laser bar ntim, thermal tswj, lossis cov khoom xaiv, xav tiv tauj peb. Peb'rov tuaj ntawm no los muab cov kev daws teeb meem kom haum rau koj qhov kev thov tshwj xeeb.
Lub sij hawm xa tuaj: Plaub Hlis-02-2025