VCSEL, wanda ake kira Vertical Cavity Surface Emitting Laser cikakke, wani nau'in laser ne na semiconductor.A halin yanzu, yawancin VCSELs sun dogara ne akan gaAs semiconductors, kuma tsayin raƙuman fitar da iska ya fi yawa a cikin rukunin igiyar ruwa ta infrared.
A cikin 1977, Farfesa Ika Kenichi na Jami'ar Fasaha ta Tokyo ya fara ba da shawarar manufar Laser mai fitar da rami a tsaye.A farkon zamanin, ya fi so ya sami Laser na'ura mai tsayi guda ɗaya tare da ingantaccen fitarwa ta hanyar rage tsawon rami.Koyaya, saboda ɗan gajeren tsayin ribar hanya ɗaya na wannan ƙira, yana da ƙalubale don samun lasin laser, don haka binciken farko na VCSEL ya daɗe.Shekaru biyu bayan haka, Farfesa Yihe Jianyi ya sami nasarar gane pulsed lasing na GaInAsP jerin lasers a 77 K ta amfani da fasahar epitaxy na ruwa lokaci (hanyar ruwa-lokaci epitaxy don haɓaka m abubuwa daga bayani da kuma ajiye su a kan substrate don samar da guda-crystal bakin ciki yadudduka. ).A cikin 1988, jerin GaAs VCSELs an haɓaka su ta hanyar fasahar tururi na sinadarai (OCVD) don cimma ci gaba da aiki a zafin daki.Tare da ci gaba da ci gaba na fasaha na epitaxial, za a iya kera sifofin DBR na semiconductor tare da babban abin nunawa, wanda ke hanzarta aiwatar da bincike na VCSEL.A ƙarshen karni na 20, bayan cibiyoyin bincike sun gwada tsari daban-daban, babban matsayi na VCSEL mai iyakanceccen iskar oxygen ya kasance da kyau sosai.Daga nan sai ya koma matakin balaga, inda ake inganta aikin koyaushe da ingantawa.
Jadawalin sashe na oxidation iyakance saman fidda laser
Yankin aiki shine muhimmin ɓangaren na'urar.Saboda ramin VCSEL gajere ne, matsakaicin aiki a cikin rami yana buƙatar samar da ƙarin riba don yanayin lasing.
Da farko, dole ne a cika sharuɗɗa guda uku a lokaci guda don samar da laser:
1) an kafa rarraba inversion mai ɗaukar kaya a cikin yanki mai aiki;
2) rami mai dacewa da ya dace yana ba da damar radiation da aka motsa don a dawo da shi sau da yawa don samar da oscillation na laser;kuma
3) allurar da ake yi yanzu tana da ƙarfi sosai don yin ribar gani sama da ko daidai da jimlar asara iri-iri da saduwa da wasu sharuɗɗan ƙofa na yanzu.
Sharuɗɗan farko guda uku sun dace da ƙirar ƙirar tsarin na'urar VCSEL.Yankin da ke aiki na VCSEL yana amfani da tsarin rijiyar ƙididdigewa don kafa tushen fahimtar rarraba juzu'i mai ɗaukar kaya na ciki.A lokaci guda kuma, an ƙera wani rami mai resonant tare da abin da ya dace don sanya hotunan da aka fitar su zama madaidaicin oscillations.A ƙarshe, ana samar da isassun ruwan allura don ba da damar photons don shawo kan asarar na'urar da kanta don ƙirƙirar dindindin
Wannan shi ne yadda Shenzhen HDV Optoelectronic Technology Co., Ltd., wani kamfanin sadarwa na gani, ya bayyana VCSEL.