Kev Taw Qhia Txog Vertical Cavity Surface Emitting Semiconductor Laser (VCSEL)

Kev Taw Qhia rau qhov ntsug qhov chaw emittinglaser semiconductor(VCSEL)
Cov lasers sab nraud ntsug uas tso tawm tau tsim nyob rau nruab nrab xyoo 1990 los kov yeej qhov teeb meem tseem ceeb uas tau cuam tshuam rau kev tsim cov lasers semiconductor ib txwm muaj: yuav ua li cas los tsim cov zis laser muaj zog nrog lub teeb zoo hauv hom transverse yooj yim.
Cov lasers uas tso tawm cov kab noj hniav sab nraud ntsug (Vecsels), tseem hu uacov laser semiconductor disc(SDL), yog ib tug tswv cuab tshiab ntawm tsev neeg laser. Nws tuaj yeem tsim qhov wavelength emission los ntawm kev hloov cov khoom siv thiab tuab ntawm quantum zoo hauv semiconductor gain medium, thiab ua ke nrog intracavity frequency doubling tuaj yeem npog ntau qhov wavelength los ntawm ultraviolet mus rau infrared deb, ua tiav cov zis hluav taws xob siab thaum tswj hwm qhov sib txawv qis Angle circular symmetric laser beam. Lub laser resonator yog tsim los ntawm cov qauv DBR hauv qab ntawm lub chip nce thiab daim iav sab nraud tso zis. Cov qauv resonator sab nraud tshwj xeeb no tso cai rau cov khoom siv kho qhov muag kom raug ntxig rau hauv qhov cavity rau kev ua haujlwm xws li zaus doubling, qhov sib txawv zaus, thiab hom-locking, ua VECSEL zoo tagnrho.qhov chaw laserrau cov ntawv thov xws li biophotonics, spectroscopy,tshuaj laser, thiab laser projection.
Lub resonator ntawm VC-surface emitting semiconductor laser yog perpendicular rau lub dav hlau uas thaj chaw nquag nyob, thiab nws lub teeb tso zis yog perpendicular rau lub dav hlau ntawm thaj chaw nquag, raws li pom hauv daim duab. VCSEL muaj cov txiaj ntsig tshwj xeeb, xws li qhov me me, zaus siab, zoo beam zoo, qhov loj qhov chaw puas tsuaj qhov chaw, thiab cov txheej txheem tsim khoom yooj yim. Nws qhia tau tias muaj kev ua tau zoo heev hauv kev siv laser zaub, kev sib txuas lus optical thiab moos optical. Txawm li cas los xij, VCsels tsis tuaj yeem tau txais cov lasers muaj zog siab dua qib watt, yog li lawv tsis tuaj yeem siv rau hauv cov teb uas muaj kev xav tau zog siab.

Lub laser resonator ntawm VCSEL yog tsim los ntawm ib qho Bragg reflector faib tawm (DBR) uas muaj ntau txheej epitaxial qauv ntawm cov khoom siv semiconductor ntawm ob sab saud thiab sab qis ntawm thaj chaw nquag, uas txawv ntawm qhovlaserLub resonator muaj cov cleavage plane hauv EEL. Qhov kev taw qhia ntawm VCSEL optical resonator yog perpendicular rau qhov chaw ntawm lub chip, cov zis laser kuj yog perpendicular rau qhov chaw ntawm lub chip, thiab qhov kev cuam tshuam ntawm ob sab ntawm DBR siab dua li ntawm EEL solution plane.
Qhov ntev ntawm lub laser resonator ntawm VCSEL feem ntau yog ob peb microns, uas yog me dua li ntawm millimeter resonator ntawm EEL, thiab ib txoj kev nce tau los ntawm qhov oscillation optical hauv qhov cavity yog qis. Txawm hais tias qhov tso zis transverse hom yooj yim tuaj yeem ua tiav, lub zog tso zis tsuas yog tuaj yeem ncav cuag ob peb milliwatts. Qhov profile cross-section ntawm VCSEL tso zis laser beam yog voj voog, thiab lub kaum sab xis divergence yog me dua li ntawm ntug-emitting laser beam. Yuav kom ua tiav cov zis siab ntawm VCSEL, nws yog qhov tsim nyog los nce thaj chaw luminous kom muab ntau qhov nce, thiab qhov nce ntawm thaj chaw luminous yuav ua rau cov zis laser los ua ntau hom tso zis. Tib lub sijhawm, nws nyuaj rau ua tiav kev txhaj tshuaj tam sim no hauv thaj chaw luminous loj, thiab kev txhaj tshuaj tam sim no tsis sib xws yuav ua rau cov cua sov pov tseg ntau ntxiv. Hauv ntej, VCSEL tuaj yeem tso tawm hom yooj yim voj voog symmetric chaw los ntawm kev tsim qauv tsim nyog, tab sis lub zog tso zis yog qis thaum cov zis yog ib hom. Yog li ntawd, ntau VCsels feem ntau koom ua ke rau hauv hom tso zis.