Lus Txhais: Ib lub laser uas siv doped optical fiber ntau li qhov nruab nrab nce, los yog ib lub laser uas feem ntau ntawm cov kab noj hniav laser resonant yog tsim los ntawm fiber ntau optical.
Fiber lasers feem ntau yog xa mus rau cov lasers uas siv cov fibers kho qhov muag los ua qhov nruab nrab, txawm tias qee cov lasers uas siv semiconductor nce media (semiconductor optical amplifiers) thiab fiber ntau resonant kab noj hniav kuj tseem hu ua fiber ntau lasers (los yog semiconductor optical lasers). Tsis tas li ntawd, qee qhov lwm hom lasers (xws li, fiber-coupled semiconductor diodes) thiab fiber ntau amplifiers kuj hu ua fiber ntau lasers (los yog fiber ntau laser systems).
Qhov nce nruab nrab feem ntau yog lub ntiaj teb tsis tshua muaj ion-doped fiber ntau, xws li erbium (Er3+), ytterbium (Yb3+), thorium (Tm3+), lossis praseodymium (Pr3+), thiab yuav tsum tau siv los ntawm ib lossis ntau dua fiber ntau-coupled laser diodes. Txawm hais tias qhov nce nruab nrab ntawm fiber ntau lasers zoo ib yam li cov khoom lag luam hauv lub xeev cov lasers, cov teebmeem waveguide thiab cov chaw me me zoo ua rau cov lasers nrog cov khoom sib txawv. Piv txwv li, lawv feem ntau muaj laser nce siab thiab resonant kab noj hniav poob. Saib cov ntsiab lus fiber ntau laser thiab lub cev laser.
Fiber laser resonant kab noj hniav
Txhawm rau kom tau txais lub laser resonant kab noj hniav siv fiber ntau optic, qee qhov reflectors tuaj yeem siv los tsim cov kab noj hniav resonant kab noj hniav lossis lub nplhaib fiber ntau laser tuaj yeem tsim. Ntau hom kev cuam tshuam tuaj yeem siv rau hauv cov kab hluav taws xob kho qhov muag laser resonant kab noj hniav:
1. Hauv kev teeb tsa hauv chav kuaj, ib qho dichroic reflector tuaj yeem siv rau ntawm qhov chaw txiav fiber ntau, raws li pom hauv daim duab 1. Txawm li cas los xij, cov tshuaj no tsis tuaj yeem siv rau kev tsim khoom loj thiab tsis ruaj khov.
2. Lub Fresnel reflection ntawm lub ntsej muag kawg ntawm lub ntsej muag liab qab yog txaus los ua ib qho kev sib txuas rau cov fiber ntau laser. Ib qho piv txwv tau muab rau hauv daim duab 2.
3. Nws tseem tuaj yeem tso cov txheej txheem dielectric ncaj qha rau ntawm qhov chaw nres nkoj fiber ntau, feem ntau yog evaporation. Xws li coatings muab ib tug loj reflectivity nyob rau hauv ib tug ntau yam.
4. Rau cov khoom lag luam, fiber ntau Bragg gratings feem ntau yog siv, uas tuaj yeem npaj ncaj qha los ntawm doped fibers lossis los ntawm fusing undoped fibers rau active fibers. Daim duab 3 qhia txog Distributed Bragg Reflection laser (DBR laser) uas muaj ob lub fiber ntau gratings, thiab ib qho kev tawm tswv yim laser muaj nyob qhov twg muaj grating nyob rau hauv doped fiber nrog ib theem hloov nyob rau hauv nruab nrab.
5. Yog hais tias lub teeb tawm ntawm lub fiber yog collimated siv lub lens thiab reflected rov qab los ntawm ib tug dichroic reflector, lub zog tuav tau zoo dua (xws li, daim duab 4). Lub teeb uas tau txais los ntawm lub reflector yuav muaj qhov txo qis heev vim muaj qhov loj ntawm lub teeb. Txawm li cas los xij, me ntsis misalignment tuaj yeem ua rau muaj kev cuam tshuam loj heev thiab ntxiv Fresnel reflections ntawm lub ntsej muag fiber ntau tuaj yeem tsim cov nyhuv lim. Cov tom kawg tuaj yeem raug tshem tawm los ntawm kev siv qaij-txiav fiber ntau cov chaw nres nkoj, tab sis qhov no qhia txog qhov kev poob ntawm lub wavelength.
6. Lub voj voog kho qhov muag kuj tuaj yeem tsim tau (Daim duab 5), siv cov khoom siv fiber ntau thiab cov khoom siv fiber ntau.
Feem ntau optical lasers yog pumped los ntawm ib los yog ntau tshaj fiber-coupled semiconductor lasers. Lub teeb lub twj tso kua mis yog txuas ncaj qha mus rau hauv cov tub ntxhais, lossis ntawm lub zog siab rau hauv lub twj tso kua mis cladding (saib Dual Cladding Fibers), raws li tau tham hauv ntau yam hauv qab no.
Muaj ntau hom fiber ntau lasers, ob peb yam uas tau piav qhia hauv qab no.
