Dab tsi yog lub laser semiconductor dav dav

Dab tsi yog ib qholaser sib txuas lus dav dav semiconductor
Cov lasers siv rau hauv yuav luag txhua lub tshuab fiber optic sensing systems (DOFS) vim tias lawv tuaj yeem txhaj tshuaj tau zoocov lasers muaj zog heevmus rau hauv cov fibers. Txawm li cas los xij, muaj ntau hom lasers, thiab ntawm no cov hom tseem ceeb tau qhia txog kev nce qhov ntev ntawm kev sib koom ua ke, piv txwv li txo qhov dav ntawm spectral. Feem ntau hais lus, lub laser yog tsim los ntawm qhov nruab nrab uas ua kom lub teeb nthuav dav los ntawm nws thiab muab cov lus tawm tswv yim los xa lub teeb amplified rov qab mus rau hauv qhov nruab nrab rau kev nce cycling. Yog li ntawd, pib los ntawm kev tso tawm tsis tu ncua hauv qhov nruab nrab nce, cov nthwv dej muaj zog thiab sib xws dua yuav raug tsim, uas nws cov yam ntxwv nyob ntawm ob qho tib si qhov nruab nrab nce thiab cov khoom tawm tswv yim. Feem ntau, cov lus tawm tswv yim muab cov qauv resonant uas tsim ib lossis ntau hom, txhua tus emitting hauv qhov ntau yam spectral nqaim.
Kev sib cuag dav davlaser semiconductor, qhov yooj yim tshaj plaws thiab thaum ntxov tshaj plaws semiconductor laser, muaj ib cheeb tsam semiconductor nce tsim los ntawm pn junction ntawm cov khoom siv bandgap ncaj qha (xws li GaAs), nrog cov lus teb los ntawm kev xav los ntawm lub laser chip's cleaned facets; Qhov ntev ntawm laser chips feem ntau yog ntau pua micrometers. Cov qauv kev sib txuas no yog tsim los tib lub sijhawm txwv cov neeg nqa khoom thiab lub teeb propagating hauv thaj tsam nce. Raws li diodes, cov khoom siv no muaj cov khoom siv hluav taws xob ntawm ob sab. Hauv lub cuab yeej sib cuag dav dav, qhov dav electrode sab saum toj yog ntau kaum ntawm micrometers (feem ntau nyob ib puag ncig 75 μ m); Yog li ntawd, lub teeb emission tsim ib kab raws qhov dav no, uas yog ib hom hauv lub dav hlau perpendicular rau qhov sib koom ua ke, thiab nthuav tawm ntau hom teeb pom kev zoo hauv lub dav hlau sib luag rau qhov sib koom ua ke. Vim yog hom emission no, cov lasers sib cuag dav dav tsuas yog tuaj yeem txuas nrog rau hauv cov fibers multimode. Txawm li cas los xij, lub zog ntawm lub laser sib cuag dav dav yog qhov siab heev, thiab nyob rau hauv cov xwm txheej ua haujlwm pulsed, 75 μ m electrode device feem ntau tuaj yeem tso zis siab tshaj 10 W.
laser sib cuag dav davCov diodes yog tsim rau qee hom Raman multimode distributed temperature sensing systems, vim tias cov systems no tsis xav tau high spectral purity. Lawv kuj siv tau rau cov sensors raws li kev poob, xws li cov systems uas siv controlled micro bending ua ib qho sensing mechanism.