Chii chinonzi laser yekubatanidza semiconductor yakafara

Chii chinonzilaser yekubatanidza semiconductor yakafara
MaLaser anoshandiswa munenge mune ese masystem ekuona fiber optic akaparadzirwa (DOFS) nekuti anogona kubaya jekiseni zvinobudirirama laser ane simba gurumu fibers. Zvisinei, kune mhando dzakasiyana dze lasers, uye pano mhando huru dzinounzwa zvichienderana nekuwedzera kureba kwekubatana, kureva kuderedza upamhi hwe spectral. Kazhinji, laser inoumbwa ne gain medium inowedzera chiedza chinopararira kuburikidza nayo uye inopa mhinduro yekutumira chiedza chakasimudzwa kudzokera mu gain medium kuti chigadzikane. Nokudaro, kutanga kubva pakubuda kwegain medium mukati me gain medium, mafungu echiedza akasimba uye akabatana achagadzirwa, ane hunhu hunoenderana ne gain medium uye feedback properties. Kazhinji, mhinduro inopa chimiro che resonant chinoumba imwe kana kupfuura modes, imwe neimwe ichiburitsa mukati me small spectral range.
Kubatana kwakafaralaser ye semiconductor, iyo semiconductor laser iri nyore uye yekutanga, ine nzvimbo yekuwana semiconductor yakagadzirwa ne pn junction yezvinhu zvakananga zve bandgap (senge GaAs), ine mhinduro inopihwa nekuratidzira kubva kumativi akacheneswa e laser chip; Kureba kwema laser chips kunowanzova mazana ema micrometer. Iyi connection structure yakagadzirirwa kudzikamisa panguva imwe chete charge carriers uye light propagating mukati me gain region. Sema diode, zvishandiso izvi zvine electrical contacts kumativi ese. Mu device yakafara yekubata, top electrode width imakumi akati wandei ema micrometers (kazhinji inenge 75 μ m); Naizvozvo, light emission inoumba mutsetse pamwe chete neupamhi uhwu, uri single-mode mu plane perpendicular kune junction, uye inopa complex multi-mode light field distribution mu plane parallel to the junction. Nekuda kwe emission mode iyi, wide contact lasers inogona kubatanidzwa zvinobudirira mu multimode fibers. Zvisinei, simba re broad contact laser rakakwira, uye pasi pe pulsed operating conditions, 75 μ m electrode device inogona kuburitsa peak power inodarika 10 W.
Laser yekubata yakafaramadiode akakodzera mamwe marudzi eRaman multimode distributed temperature sensits, sezvo masisitimu aya asingade high spectral purity. Anoshandawo kuma loss based sensors, akadai seaya masisitimu anoshandisa controlled micro bend senzira yekunzwa.