Cov Tshuab Fiber Optic Amplifiers Tshuab
Hauv kev sib txuas lus fiber optic, qhov pom teeb lossis infrared (IR) kab hluav taws uas nqa los ntawm ib lub tshuab fiber ntau yog thaum lawv taug kev los ntawm cov khoom. Tom qab ntawd muaj los rau fiber ntau optic amplifier uas yog siv los txhawb rau qhov xwm txheej ntawm cov ntaub ntawv thaum lub sijhawm kis tau tus mob.
Amplifiers raug tso rau ntawm tej qhov chaw los txhawb kev kho qhov muag nyob rau hauv qhov system uas qhov teeb meem tsis muaj zog. Qhov no boost tso cai rau cov kev taw qhia kom tau ntse kis mus los ntawm qhov seem uas yog cable ntev. Nyob rau hauv cov tes hauj lwm loj, ntev ntev ntawm optical fiber amplifiers raug muab tso rau hauv ib theem zuj zus raws tag nrho qhov txuas network.
Cov nquag pom cov tshuab fiber ntau xws li Erbium-Doped Fiber Amplifier (los yog EDFA Optical Amplifier), Raman fiber ntau amplifier, thiab silicon optical amplifier (SOA). Erbium doped fiber ntau amplifier yog lub hom phom ntau zog siv los txhawb lub teeb liab hauv WDM fiber ntau optic system, raws li peb paub tias nws yog WDM uas ua rau lub peev xwm ntawm cov kev sib txuas lus muaj fiber ntau thiab nws yog cov erbium-doped fiber amplifier uas ua rau Kev xa mus rau WDM tau. Fiber amplifiers yog tsim los txhawb Kev Sib Thooj Zog Ntev Ntau Dua (DWDM) uas yog hu ua DWDM EDFA amplifier thiab nthuav mus rau lwm lub koog wavelength uas tau txais los ntawm fiber ntau optics.
Muaj ntau ntau lub cev mechanisms uas yog siv los ua kom nrov loj ntawm lub teeb liab, uas sib txuas mus rau cov hom loj ntawm cov khoom siv fais fab. Nyob rau hauv doped fiber ntau amplifiers thiab bulk lasers, stimulated emission nyob rau hauv lub amplifier qhov nce qhov nruab nrab ua amplification ntawm lub teeb tuaj. Nyob rau hauv semiconductor kho qhov muag amplifiers (SOAs), electron-hole recombination tshwm sim. Nyob rau hauv Raman amplifiers, Raman tawg ntawm cov khoom tuaj nrog cov phonons hauv lub lattice ntawm qhov nce qhov tsim tawm photons teeb meem nrog cov khoom xa tuaj. Parametrical amplifiers siv parametric amplification.
Thaum lub teeb kis tau los ntawm qhov teeb meem, ib feem ntawm lub teeb tau tawg nyob rau hauv kev qhia. Ib qho me me ntawm lub teeb tawg tau tso tawm ntau zaus ntawm qhov teeb meem ntawm qhov teeb meem sib npaug ntawm cov sib npaug ntawm cov khoom hluav taws xob nrawm. Raman fiber optic amplifiers ua haujlwm nyob rau hauv no me me scattering ntau. Yog tias qhov nqaj xub thawj yog qhov mob siab khov thiab monochromatic, qhov chaw pib tshaj li uas lub teeb ntawm lub Raman frequencies tau ua kom nrov dua, ua kom pom zoo, thiab feem ntau pom cov yam ntxwv ntawm kev ua pa taws. Qhov no yog hu ua stimulated lossis coherent Raman effect.
EFDA fiber optic amplifier zog los ntawm kev ntxiv erbium, tsawg lub ntiaj teb ions, rau cov tub ntxhais fiber ntau li ib dopant; feem ntau nyob rau theem ntawm ob peb puas feem ntawm ib lab. Lub fiber ntau pob tshab ntawm lub erbium lasing wavelength ntawm ob rau cuaj microns. Thaum pumped los ntawm ib lub laser diode, qhov muag qhov muag tau tsim, thiab kev pib sib ntxiv.
Silicon lossis semiconductor optical amplifier zog zoo ib yam li laser yooj yim. Cov qauv no zoo li qub, nrog ob qho tshwjxeeb tsim cov khoom sib txuam ntawm cov khoom siv rau sab saum toj, nrog lwm cov ntaub ntawv nyob rau hauv nruab nrab ntawm lawv ua tus "active layer". Ib qho hluav taws xob tam sim no tau tsim los ntawm lub cuab yeej xwv kom ua kom muaj siab electrons uas tuaj yeem poob rov qab mus rau hauv lub xeev tsis-zoo siab hauv lub xeev thiab muab cov duab. Cov khoom siv kho hluav taws xob tuaj yeem ua pa tawm ntawm lub teeb ntawm nws tus kheej wavelength.
Fiber optic repeater kuj rov tuaj yeem ua kom nrov tau lub teeb liab, tiam sis nws tsuas ua tau hauj lwm ntawm ib lub hom phiaj wavelength thiab tsis haum rau WDM systems. Qhov ntawd yog vim li cas vim li cas fiber optic amplifier plays lub luag haujlwm tseem ceeb dua hauv kev sib txuas lus.