Optical amplifiers hauv kev sib txuas lus kho qhov muag fiber ntau

Optical amplifiers hauv kev sib txuas lus kho qhov muag fiber ntau

An optical amplifieryog ib qho cuab yeej uas ua kom pom cov teeb liab optical. Hauv kev sib txuas lus kho qhov muag fiber ntau, nws tsuas yog ua lub luag haujlwm hauv qab no: 1. Txhim kho thiab ua kom lub zog kho qhov muag. Los ntawm kev tso lub optical amplifier nyob rau pem hauv ntej kawg ntawm lub optical transmitter, lub hwj chim kho qhov muag nkag mus rau hauv fiber ntau tuaj yeem nce ntxiv. 2. Online relay amplification, hloov Repeaters uas twb muaj lawm nyob rau hauv optical fiber kev sib txuas lus systems; 3. Preamplification: Ua ntej lub photodetector ntawm qhov kawg tau txais, lub teeb liab tsis muaj zog yog pre-amplified los txhim kho qhov tau txais rhiab heev.

Tam sim no, Optical amplifiers saws nyob rau hauv Optical fiber kev sib txuas lus mas muaj xws li cov nram qab no hom: 1. Semiconductor optical amplifier (SOA Optical amplifier)/Semiconductor laser amplifier (SLA Optical amplifier); 2. Tsis tshua muaj lub ntiaj teb-doped fiber ntau amplifiers, xws li bait-doped fiber amplifiers (EDFA Optical Amplifier), thiab lwm yam 3. Nonlinear fiber ntau amplifiers, xws li fiber ntau Raman amplifiers, thiab lwm yam. Cov hauv qab no yog cov lus qhia luv luv raws li.

1.Semiconductor optical amplifiers: Raws li kev thov sib txawv thiab nrog lub ntsej muag sib txawv ntawm qhov kawg, semiconductor lasers tuaj yeem tsim ntau hom semiconductor optical amplifiers. Yog hais tias tus tsav tam sim no ntawm lub semiconductor laser qis dua nws qhov pib, uas yog, tsis muaj laser yog generated, lub sij hawm no, ib tug optical teeb liab input mus rau ib kawg. Ntev npaum li qhov zaus ntawm qhov teeb meem kho qhov muag no nyob ze ntawm qhov chaw spectral ntawm lub laser, nws yuav ua kom nrov nrov thiab tso tawm los ntawm lwm qhov kawg. Hom nosemiconductor optical amplifieryog hu ua Fabry-Perrop hom optical amplifier (FP-SLA). Yog hais tias lub laser yog biased saum toj ntawm qhov pib, qhov tsis muaj zog ib hom kho qhov muag teeb liab tawm tswv yim los ntawm ib qho kawg, tsuav yog qhov zaus ntawm qhov teeb meem ntawm qhov teeb meem no nyob rau hauv lub spectrum ntawm no multimode laser, lub teeb liab kho qhov muag yuav tsum amplified thiab xauv rau ib yam hom. Qhov no optical amplifier yog hu ua injaction-locked type amplifier (IL-SLA). Yog hais tias ob qhov kawg ntawm ib tug semiconductor laser yog iav-coated los yog evaporated nrog ib txheej ntawm anti-reflection zaj duab xis, ua rau nws emissivity tsawg heev thiab tsis muaj peev xwm tsim ib tug Fabry-Perrow resonant kab noj hniav, thaum lub optical teeb liab dhau los ntawm lub active waveguide txheej, nws yuav amplified thaum mus txawv tebchaws. Yog li ntawd, hom optical amplifier no yog hu ua ib qho kev mus ncig yoj hom optical amplifier (TW-SLA), thiab nws cov qauv tau qhia hauv daim duab hauv qab no. Vim hais tias cov bandwidth ntawm cov kev mus ncig yoj hom optical amplifier yog peb qhov kev txiav txim siab loj dua li ntawm Fabry-Perot hom amplifier, thiab nws 3dB bandwidth tuaj yeem ncav cuag 10THz, nws tuaj yeem ua kom pom cov teeb liab ntawm ntau zaus thiab yog qhov zoo tshaj plaws optical amplifier.

2. Bait-doped fiber ntau amplifier: Nws muaj peb ntu: thawj yog doped fiber ntau nrog qhov ntev li ntawm ob peb meters mus rau kaum ntawm meters. Cov impurities no feem ntau tsis tshua muaj lub ntiaj teb ions, uas tsim cov khoom siv ua kom laser; Qhov thib ob yog lub laser twj tso kua mis qhov chaw, uas muab lub zog ntawm qhov tsim nyog wavelengths kom excite lub doped tsawg lub ntiaj teb ions thiaj li ua tau lub amplification ntawm lub teeb. Qhov thib peb yog lub coupler, uas ua rau lub twj tso kua mis lub teeb thiab teeb liab teeb rau ob peb mus rau hauv doped optical fiber activating khoom. Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub tshuab hluav taws xob fiber ntau zoo ib yam li cov khoom siv lub xeev laser. Nws ua rau ib tug reversed particle tooj faib lub xeev nyob rau hauv lub laser-activated khoom thiab generates stimulated hluav taws xob. Txhawm rau tsim kom muaj qhov ruaj khov particle tus lej inversion faib lub xeev, ntau tshaj ob theem zog yuav tsum tau koom nrog hauv kev hloov kho qhov muag, feem ntau yog peb-theem thiab plaub-theem systems, nrog rau cov khoom siv txuas ntxiv ntawm lub zog los ntawm lub twj tso kua mis. Txhawm rau muab lub zog zoo, lub wavelength ntawm lub twj tso kua mis photon yuav tsum luv dua li ntawm lub laser photon, uas yog, lub zog ntawm lub twj tso kua mis photon yuav tsum ntau dua li ntawm lub laser photon. Tsis tas li ntawd, cov kab noj hniav resonant tsim cov lus pom zoo, thiab yog li lub tshuab hluav taws xob laser tuaj yeem tsim.

3. Nonlinear fiber amplifiers: Ob lub nonlinear fiber amplifiers thiab erbium fiber amplifiers poob rau hauv qeb ntawm fiber ntau amplifiers. Txawm li cas los xij, yav dhau los siv cov nyhuv nonlinear ntawm quartz fibers, thaum yav tas los siv erbium-doped quartz fibers los ua haujlwm ntawm kev tshaj tawm. Ordinary quartz optical fibers yuav tsim muaj zog nonlinear teebmeem nyob rau hauv qhov kev txiav txim ntawm lub zog twj tso kua mis lub teeb ntawm qhov tsim nyog wavelengths, xws li stimulated Raman scattering (SRS), stimulated Brillouin scattering (SBS), thiab plaub-yoj sib tov cuam tshuam. Thaum lub teeb liab kis tau los ntawm cov khoom siv kho qhov muag nrog rau lub teeb pom kev zoo, lub teeb liab teeb liab tuaj yeem ua kom nrov. Yog li, lawv tsim fiber ntau Raman amplifiers (FRA), Brillouin amplifiers (FBA), thiab parametric amplifiers, tag nrho cov uas yog faib fiber ntau amplifiers.

Summary : Cov kev loj hlob zoo ntawm tag nrho cov optical amplifiers yog siab nce, siab tso zis zog, thiab tsis tshua muaj suab nrov daim duab.