Chiyambi cha vertical cavity surface emitting semiconductor laser (VCSEL)

Chiyambi cha vertical cavity surface emittinglaser semiconductor(VCSEL)
Ma lasers owoneka bwino akunja otulutsa pamwamba adapangidwa pakati pa zaka za m'ma 1990 kuti athetse vuto lalikulu lomwe lasokoneza chitukuko cha ma semiconductor lasers achikhalidwe: momwe angatulutsire zotulutsa zamphamvu zamphamvu kwambiri zokhala ndi mtengo wapamwamba kwambiri pamachitidwe osinthira.
Ma lasers ophatikizika akunja otulutsa (Vecsels), omwe amadziwikanso kutilaser semiconductor disc(SDL), ndi membala watsopano wabanja la laser. Ikhoza kupanga umuna wavelength mwa kusintha kapangidwe ka zinthu ndi makulidwe a quantum bwino mu semiconductor kupeza sing'anga, ndipo kuphatikiza ndi intracavity pafupipafupi kuwirikiza kawiri kumatha kuphimba mafunde osiyanasiyana kuchokera ku ultraviolet kupita ku infrared kutali, kukwaniritsa mphamvu yayikulu ndikusunga kusiyana kochepa. Angle yozungulira symmetric laser mtengo. Laser resonator imapangidwa ndi mawonekedwe apansi a DBR a phindu chip ndi galasi lakunja lolumikizira. Mapangidwe apadera a resonator akunja awa amalola kuti zinthu zowoneka bwino zilowetsedwe m'bowo kuti zigwire ntchito monga kuwirikiza kawiri, kusiyanasiyana kwafupipafupi, ndi kutsekeka, kupangitsa VECSEL kukhala yabwino.gwero la laserntchito kuyambira biophotonics, spectroscopy,laser mankhwalandi laser projection.
The resonator wa VC-surface emitting semiconductor laser ndi perpendicular kwa ndege kumene yogwira dera lili, ndipo linanena bungwe kuwala kwake ndi perpendicular ndege ya dera yogwira, monga momwe chithunzi.VCSEL ali ndi ubwino wapadera, monga yaing'ono kukula, ma frequency apamwamba, mtengo wabwino wamtengo, chiwopsezo chachikulu chakuwonongeka pamtunda, komanso njira yosavuta yopanga. Imawonetsa magwiridwe antchito abwino kwambiri pamawonekedwe a laser, kulumikizana ndi kuwala ndi wotchi ya kuwala. Komabe, ma VCsels sangathe kupeza ma laser amphamvu kwambiri kuposa mulingo wa watt, kotero sangathe kugwiritsidwa ntchito m'minda yomwe ili ndi mphamvu zambiri.

Laser resonator ya VCSEL imapangidwa ndi Bragg reflector (DBR) yopangidwa ndi multilayer epitaxial structure ya semiconductor material kumbali zonse zakumwamba ndi zapansi za dera logwira ntchito, lomwe ndilosiyana kwambiri ndilaserresonator yopangidwa ndi cleavage ndege mu EEL. Mayendedwe a VCSEL optical resonator ndi perpendicular to chip surface, laser linanena bungwe limakhalanso perpendicular kwa chip pamwamba, ndipo reflectivity mbali zonse za DBR ndi apamwamba kwambiri kuposa EEL yankho ndege.
Kutalika kwa laser resonator ya VCSEL nthawi zambiri kumakhala ma microns ochepa, omwe ndi ocheperako kuposa ma millimeter resonator a EEL, ndipo phindu lanjira imodzi lomwe limapezedwa ndi oscillation ya kuwala m'bowo ndilotsika. Ngakhale kutulutsa kofunikira kosinthira kumatha kukwaniritsidwa, mphamvu yotulutsa imatha kufikira ma milliwatts angapo. Mbiri yagawo la VCSEL yotulutsa laser mtengo ndi yozungulira, ndipo Divergence Angle ndi yaying'ono kwambiri kuposa ya laser yotulutsa m'mphepete. Kuti mukwaniritse mphamvu zambiri za VCSEL, ndikofunikira kuwonjezera dera lowala kuti lipereke phindu lochulukirapo, ndipo kuwonjezeka kwa dera lowala kumapangitsa kuti laser yotulutsa ikhale yotulutsa mitundu yambiri. Panthawi imodzimodziyo, zimakhala zovuta kukwaniritsa jekeseni wamakono m'dera lalikulu lowala, ndipo jekeseni wosagwirizana wamakono adzawonjezera kutentha kwa zinyalala. mphamvu yotulutsa imakhala yochepa pamene kutulutsa kumakhala mode imodzi.Chifukwa chake, ma VCsels angapo nthawi zambiri amaphatikizidwa mumayendedwe otuluka.