Kodi laser yolumikizirana kwambiri ya semiconductor ndi chiyani?

Kodi ndi chiyanilaser yolumikizirana kwambiri ya semiconductor
Ma laser amagwiritsidwa ntchito pafupifupi mu makina onse ogawa fiber optic sensing systems (DOFS) chifukwa amatha kubaya bwinoma laser amphamvu kwambirimu ulusi. Komabe, pali mitundu yosiyanasiyana ya ma laser, ndipo apa mitundu yayikulu imayambitsidwa motsatira kutalika kowonjezera kwa mgwirizano, mwachitsanzo kuchepa kwa m'lifupi mwa spectral. Kawirikawiri, laser imapangidwa ndi gain medium yomwe imakulitsa kuwala komwe kumafalikira kudzera mu iyo ndikupereka mayankho kuti itumize kuwala kowonjezereka kubwerera ku gain medium kuti ibwererenso. Chifukwa chake, kuyambira pa kutulutsa kwadzidzidzi mkati mwa gain medium, mafunde amphamvu komanso ogwirizana kwambiri amapangidwa, omwe makhalidwe awo amadalira gain medium komanso mawonekedwe a feedback. Nthawi zambiri, feedback imapereka kapangidwe kogwirizana komwe kamapanga njira imodzi kapena zingapo, iliyonse imatulutsa mkati mwa spectral range yopapatiza.
Kulumikizana kwakukululaser ya semiconductor, laser yosavuta komanso yoyambirira ya semiconductor, imakhala ndi dera lopeza ma semiconductor lomwe limapangidwa ndi pn junction ya direct bandgap material (monga GaAs), ndi mayankho omwe amaperekedwa ndi kuwala kuchokera mbali zotsukidwa za laser chip; Kutalika kwa ma laser chips nthawi zambiri kumakhala ma micrometer mazana angapo. Kapangidwe kolumikizira kameneka kamapangidwa kuti kachepetse nthawi imodzi zonyamulira ma charger ndi kuwala komwe kumafalikira mkati mwa dera lopeza ma gain. Monga ma diode, zida izi zimakhala ndi kulumikizana kwamagetsi mbali zonse ziwiri. Mu chipangizo cholumikizira chachikulu, m'lifupi mwa electrode yapamwamba ndi ma micrometer makumi angapo (nthawi zambiri pafupifupi 75 μ m); Chifukwa chake, kutulutsa kwa kuwala kumapanga mzere m'lifupi mwake, womwe ndi single-mode mu ndege yolunjika ku junction, ndipo umapereka kugawa kwamphamvu kwa magetsi ambiri mu ndege yofanana ndi junction. Chifukwa cha njira yotulutsa iyi, ma laser olumikizana ambiri amatha kuphatikizidwa bwino kukhala ulusi wa multimode. Komabe, mphamvu ya laser yolumikizana yayikulu ndi yayikulu, ndipo pansi pa mikhalidwe yogwirira ntchito, chipangizo cha electrode cha 75 μ m nthawi zambiri chimatha kutulutsa mphamvu yayikulu yopitilira 10 W.
Laser yolumikizirana yotakataMa diode ndi oyenera mitundu ina ya makina owonera kutentha omwe amagawidwa ndi Raman multimode, chifukwa makina awa safuna kuyera kwambiri kwa ma spectral. Amagwiritsidwanso ntchito pa masensa otengera kutayika, monga makina omwe amagwiritsa ntchito ma micro bend olamulidwa ngati njira yowunikira.