Nhanganyaya kune vertical cavity surface emitting semiconductor laser (VCSEL)

Nhanganyaya yekumira kwemhara pamusoro pekubvisalaser ye semiconductor(VCSEL)
Malaser anoburitsa pamusoro pevhu akamira akagadzirwa pakati pemakore ekuma1990 kuti agadzirise dambudziko guru rave richinetsa kugadzirwa kwemalaser emhando yepamusoro: maitiro ekugadzira malaser ane simba guru ane mhando yepamusoro yemwaranzi muchimiro che transverse mode.
Malaser ekunze anoburitsa pamusoro akamira akamira (Vecsels), anozivikanwawo selasers dzemadhisiki e semiconductor(SDL), inhengo itsva yemhuri yelaser. Inogona kugadzira wavelength ye emission nekuchinja chimiro chezvinhu uye ukobvu hwe quantum well mu semiconductor gain medium, uye pamwe chete ne intracavity frequency doubling inogona kufukidza huwandu hwakakura hwe wavelength kubva ku ultraviolet kusvika kure infrared, ichiwana simba rakawanda rekuburitsa uku ichichengetedza divergence yakaderera. Angle circular symmetric laser beam. Laser resonator inoumbwa ne DBR structure yepasi ye gain chip uye external output coupling mirror. Iyi external resonator structure yakasarudzika inobvumira optical elements kuti iiswe mu cavity yekushanda kwakadai se frequency doubling, frequency difference, uye mode-locking, zvichiita kuti VECSEL ive yakanaka.sosi yelaseryekushandiswa kubva ku biophotonics, spectroscopy,mushonga we laser, uye projection yelaser.
Resonator yeVC-surface emitting semiconductor laser yakatarisana nendege ine nzvimbo inoshanda, uye chiedza chayo chinobuda chakatarisana nendege yenzvimbo inoshanda, sezvakaratidzwa mumufananidzo.VCSEL ine zvakanakira zvakasiyana, zvakaita sehukuru hudiki, frequency yakakwira, mhando yakanaka yemwaranzi, chiyero chikuru chekukuvadzwa kwenzvimbo ine cavity, uye maitiro ari nyore ekugadzira. Inoratidza kushanda kwakanaka mukushandiswa kwe laser display, optical communication uye optical clock. Zvisinei, VCsels haigone kuwana ma laser ane simba rakawanda kupfuura watt level, saka haagone kushandiswa munzvimbo dzine simba rakawanda.

Iyo laser resonator yeVCSEL inoumbwa neBragg reflector yakaparadzirwa (DBR) inoumbwa ne multi-layer epitaxial structure yezvinhu zve semiconductor kumativi ese ari maviri ekumusoro neapasi enzvimbo inoshanda, iyo yakasiyana zvikuru nelaserresonator inoumbwa ne cleavage plane muEEL. Kutungamira kweVCSEL optical resonator kwakanangana nepamusoro pechip, kubuda kwelaser kwakananganawo nepamusoro pechip, uye reflectivity yemativi ese eDBR yakakwira zvikuru kupfuura iyo yeEEL solution plane.
Kureba kwe laser resonator yeVCSEL kazhinji i microns shoma, iyo idiki zvikuru pane ye millimeter resonator yeEEL, uye imwe-way gain inowanikwa ne optical field oscillation mu cavity yakaderera. Kunyangwe core transverse mode output ichigona kuwanikwa, simba rekubuda rinogona kusvika ma milliwatts akati wandei. Cross-section profile yeVCSEL output laser beam yakatenderera, uye divergence Angle idiki zvikuru pane ye edge-emitting laser beam. Kuti uwane high power output yeVCSEL, zvakakosha kuwedzera luminous region kuti ipe gain yakawanda, uye kuwedzera kwe luminous region kuchaita kuti output laser ive multi-mode output. Panguva imwe chete, zvakaoma kuwana uniform current injection munzvimbo hombe luminous, uye uneven current injection ichawedzera kuwanda kwekupisa kwemarara. Muchidimbu, VCSEL inogona kuburitsa basic mode circular symmetric spot kuburikidza ne reasonable structural design, asi output power yakaderera kana output iri single mode. Saka, maVCsel akawanda anowanzo batanidzwa mu output mode.