Hauv kev siv cov lasers muaj zog heev, cov laser bars yog cov khoom tseem ceeb uas tsis tuaj yeem tsis tau. Lawv tsis yog tsuas yog ua cov chav tseem ceeb ntawm cov zis hluav taws xob xwb, tab sis lawv kuj ua rau muaj qhov tseeb thiab kev koom ua ke ntawm kev tsim kho optoelectronic niaj hnub no.—ua rau lawv tau lub npe menyuam yaus: lub "cav" ntawm cov tshuab laser. Tab sis qhov tseeb ntawm cov qauv ntawm lub laser bar yog dab tsi, thiab nws xa kaum lossis txawm tias pua pua watts ntawm cov zis los ntawm ob peb millimeters hauv qhov loj me? Tsab xov xwm no tshawb nrhiav cov qauv sab hauv thiab cov lus zais ntawm kev tsim kho tom qab laser bars.
1. Lub Laser Bar Yog Dab Tsi?
Ib lub laser bar yog ib lub cuab yeej emitting muaj zog siab uas muaj ntau lub laser diode chips uas tau teeb tsa rau ntawm ib lub substrate. Txawm hais tias nws txoj haujlwm ua haujlwm zoo ib yam li ib lub semiconductor laser, lub laser bar siv ntau-emitter layout kom ua tiav lub zog optical siab dua thiab daim ntawv me dua.
Cov kab laser siv dav dav thoob plaws hauv kev lag luam, kev kho mob, kev tshawb fawb, thiab kev tiv thaiv, txawm tias yog cov chaw laser ncaj qha lossis ua cov chaw twj tso kua mis rau cov lasers fiber thiab cov lasers solid-state.
2. Cov Qauv Sib xyaw ntawm Laser Bar
Lub qauv sab hauv ntawm lub laser bar ncaj qha txiav txim siab nws qhov kev ua tau zoo. Nws feem ntau muaj cov khoom tseem ceeb hauv qab no:
①Cov Teeb Meem Emitter
Feem ntau cov laser bars muaj 10 txog 100 lub emitters (laser cavities) uas teeb tsa ua ke. Txhua lub emitter yog li 50–150μm dav thiab ua haujlwm ua thaj chaw nce siab ywj pheej, muaj PN junction, resonant cavity, thiab waveguide qauv los tsim thiab tso tawm lub teeb laser. Txawm hais tias txhua lub emitters sib koom tib lub substrate, lawv feem ntau raug tsav hluav taws xob hauv parallel lossis los ntawm thaj chaw.
②Cov Qauv Txheej Txheem Semiconductor
Hauv plawv ntawm lub laser bar yog ib pawg ntawm cov txheej semiconductor, suav nrog:
- Cov khaubncaws sab nraud povtseg P-hom thiab N-hom epitaxial (ua rau PN sib tshuam)
- Txheej txheem nquag (piv txwv li, cov qauv quantum well), uas tsim cov pa tawm uas raug txhawb nqa
- Txheej waveguide, xyuas kom meej tias hom kev tswj hwm hauv cov lus qhia sab thiab ntsug
- Bragg reflectors lossis HR/AR coatings, uas txhim kho cov zis ntawm lub laser
③Cov Qauv Tswj Xyuas Thermal thiab Substrate
Cov emitters raug loj hlob ntawm ib lub monolithic semiconductor substrate (feem ntau yog GaAs). Rau kev ua kom sov zoo, lub laser bar raug soldered rau ntawm cov high-conductivity submounts xws li tooj liab, W-Cu alloy, lossis CVD pob zeb diamond, thiab ua ke nrog cov cua sov thiab cov tshuab ua kom txias.
④Kev Tso Tawm Nto thiab Collimation System
Vim yog lub kaum sab xis loj ntawm cov teeb ci tawm, cov kab laser feem ntau yog nruab nrog cov micro-lens arrays (FAC / SAC) rau kev sib sau ua ke thiab cov duab ntawm lub teeb. Rau qee qhov kev siv, cov khoom siv ntxiv—xws li cov iav cylindrical lossis prisms—siv los tswj kev sib txawv ntawm thaj chaw deb thiab qhov zoo ntawm lub teeb.
3. Cov Yam Tseem Ceeb Tseem Ceeb Uas Cuam Tshuam Rau Kev Ua Tau Zoo
Cov qauv ntawm lub laser bar ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws qhov ruaj khov, kev ua haujlwm zoo, thiab lub neej ua haujlwm. Ob peb yam tseem ceeb suav nrog:
①Kev Tsim Kho Kev Tswj Xyuas Kub
Cov kab laser muaj lub zog ceev ceev thiab kub concentrated. Kev tiv thaiv thermal qis yog qhov tseem ceeb, ua tiav los ntawm AuSn soldering lossis indium bonding, ua ke nrog microchannel txias rau kev sib npaug ntawm cov cua sov.
②Kev Tsim thiab Kev Sib Tshuam ntawm Beam
Feem ntau cov emitters tsis sib haum thiab tsis sib haum ntawm lub wavefront. Kev tsim thiab kev sib dhos ntawm lub lens yog qhov tseem ceeb rau kev txhim kho qhov zoo ntawm lub teeb pom kev deb.
③Kev Tswj Kev Nyuaj Siab thiab Kev Ntseeg Tau
Cov khoom siv tsis sib xws hauv cov coefficients thermal expansion yuav ua rau warping lossis microcracks. Cov ntim khoom yuav tsum tau tsim los faib cov kev ntxhov siab mechanical sib npaug thiab tiv taus thermal cycling yam tsis muaj kev puas tsuaj.
4. Cov Qauv Yav Tom Ntej hauv Kev Tsim Laser Bar
Raws li qhov xav tau lub zog siab dua, qhov me dua, thiab kev ntseeg siab dua, cov qauv laser bar txuas ntxiv hloov zuj zus. Cov lus qhia tseem ceeb ntawm kev txhim kho suav nrog:
①Kev nthuav dav ntawm qhov ntev: Nthuav mus rau 1.5μm thiab nruab nrab infrared bands
②Miniaturization: Pab kom siv tau rau hauv cov khoom siv compact thiab cov modules sib xyaw ua ke zoo heev
③Ntim Khoom Ntse: Kev siv cov ntsuas kub thiab cov txheej txheem teb rov qab
④Kev Sib Sau Ua Ke Siab: Cov txheej txheem sib dhos ua ke kom ua tiav cov zis theem kilowatt hauv qhov chaw me me
5. Xaus Lus
Raws li qhov"lub siab"ntawm cov tshuab laser muaj zog heev, kev tsim qauv ntawm cov laser bars cuam tshuam ncaj qha rau qhov kev ua haujlwm ntawm lub teeb pom kev zoo, hluav taws xob, thiab thermal ntawm tag nrho lub cev. Kev koom ua ke ntawm ntau lub emitters rau hauv ib lub qauv tsuas yog millimeters dav tsis yog tsuas yog qhia txog cov khoom siv siab heev thiab cov txheej txheem tsim khoom, tab sis kuj sawv cev rau qib siab ntawm kev koom ua ke niaj hnub no's kev lag luam photonics.
Saib mus tom ntej, thaum qhov kev thov rau cov khoom siv laser zoo thiab txhim khu kev qha txuas ntxiv nce siab, kev tsim kho tshiab hauv cov qauv laser bar yuav tseem yog tus tsav tsheb tseem ceeb hauv kev txhim kho kev lag luam laser mus rau qhov siab tshiab.
Yog koj'tab tom nrhiav kev pab txhawb nqa los ntawm cov kws tshaj lij hauv kev ntim khoom laser, kev tswj hwm thermal, lossis kev xaiv khoom, xav tiv tauj peb. Peb'nyob ntawm no los muab cov kev daws teeb meem uas haum rau koj cov kev xav tau tshwj xeeb.
Lub sijhawm tshaj tawm: Lub Xya Hli-02-2025