Menene laser mai faɗi na semicontact semicontact laser?

MeneneLaser mai faɗi na semiconductor mai lamba
Ana amfani da laser a kusan dukkan tsarin gano fiber optic (DOFS) saboda suna iya yin allurar da ta dace.lasers masu ƙarficikin zare. Duk da haka, akwai nau'ikan laser daban-daban, kuma a nan an gabatar da manyan nau'ikan bisa ga ƙara tsawon haɗin kai, wato rage faɗin spectral. Gabaɗaya, laser ya ƙunshi matsakaiciyar riba wanda ke ƙara hasken da ke yaɗuwa ta cikinsa kuma yana ba da ra'ayi don aika hasken da aka ƙara zuwa matsakaicin riba don zagayowar riba. Saboda haka, farawa daga fitarwa kwatsam a cikin matsakaicin riba, za a samar da raƙuman haske masu ƙarfi da haɗin kai, waɗanda halayensu suka dogara da matsakaicin riba da halayen ra'ayi. Yawanci, ra'ayi yana ba da tsarin resonant wanda ke samar da yanayi ɗaya ko fiye, kowannensu yana fitarwa a cikin kunkuntar kewayon spectral.
Faɗin hulɗaLaser na semiconductor, mafi sauƙi kuma farkon laser semiconductor, ya ƙunshi yankin samun semiconductor wanda aka samar ta hanyar haɗin pn na kayan haɗin kai tsaye (kamar GaAs), tare da ra'ayoyin da aka bayar ta hanyar tunani daga fuskokin da aka tsaftace na'urar laser; Tsawon guntun laser yawanci yana da micrometers ɗari da yawa. An tsara wannan tsarin haɗin don a lokaci guda yana iyakance masu ɗaukar caji da hasken da ke yaɗuwa a cikin yankin riba. A matsayin diodes, waɗannan na'urori suna da lambobin lantarki a ɓangarorin biyu. A cikin na'urar hulɗa mai faɗi, faɗin electrode na sama yana da dubban micrometers da yawa (yawanci kusan 75 μ m); Saboda haka, fitar da haske yana samar da layi tare da wannan faɗin, wanda yake yanayi ɗaya a cikin jirgin sama a tsaye zuwa mahaɗin, kuma yana gabatar da rarraba filin haske mai rikitarwa da yawa a cikin jirgin sama a layi ɗaya da mahaɗin. Saboda wannan yanayin fitarwa, ana iya haɗa lasers masu faɗi da inganci kawai cikin zaruruwan multimode. Duk da haka, ƙarfin laser mai faɗi yana da girma sosai, kuma a ƙarƙashin yanayin aiki mai ƙarfi, na'urar lantarki mai 75 μ m yawanci tana iya fitar da ƙarfin kololuwa fiye da 10 W.
Laser mai faɗi da yawaDiodes sun dace da wasu nau'ikan tsarin Raman multimode distributed thermal sensing systems, domin waɗannan tsarin ba sa buƙatar cikakken tsarkin spectral. Haka kuma suna aiki ga na'urori masu auna asara, kamar waɗancan tsarin da ke amfani da ƙananan lanƙwasawa a matsayin hanyar ji.