Txoj cai thiab kev siv ntawmEDFA erbium-doped fiber ntau amplifier
Lub hauv paus qauv ntawmEDFAerbium-doped fiber ntau amplifier, uas yog tsim los ntawm ib tug active nruab nrab (ntaus meters ntev doped quartz fiber, tub ntxhais txoj kab uas hla 3-5 microns, doping concentration (25-1000) x10-6), twj tso kua mis teeb qhov chaw (990 los yog 1480nm LD), optical coupler thiab optical cais. Lub teeb ci ntsa iab thiab lub teeb pom kev zoo tuaj yeem nthuav tawm hauv tib qho kev taw qhia (co-tswj), kev taw qhia rov qab (rov qab siv), lossis ob qho kev qhia (bidirectional pumping) hauv Erbium fiber. Thaum lub teeb pom kev zoo thiab lub teeb twj tso kua mis raug txhaj rau hauv erbium fiber tib lub sijhawm, erbium ion zoo siab rau qib siab zog (peb-theem system) nyob rau hauv qhov kev txiav txim ntawm lub teeb lub teeb, thiab sai sai decayed mus rau theem metastable. Thaum nws rov qab mus rau hauv av hauv lub xeev nyob rau hauv qhov kev txiav txim ntawm qhov teeb meem teeb liab teeb liab, lub photon coj mus rau lub teeb liab teeb yog emitted, thiaj li hais tias lub teeb liab yog amplified. Nws cov amplified spontaneous emission (ASE) spectrum muaj ib tug loj bandwidth (txog 20-40nm) thiab muaj ob lub ncov sib xws rau 1530nm thiab 1550nm feem.
Lub ntsiab zoo ntawmEDFA amplifieryog cov nce siab, loj bandwidth, siab tso zis zog, siab twj efficiency, tsis muaj insertion poob, thiab insensitivity rau polarization xeev.
Lub hauv paus ntsiab lus ua haujlwm ntawm erbium-doped fiber ntau amplifier
Erbium-doped fiber ntau amplifier (EDFA Optical Amplifier) feem ntau yog tsim los ntawm erbium-doped fiber ntau (txog 10-30m ntev) thiab lub teeb pom kev zoo. Lub hauv paus ntsiab lus ua haujlwm yog tias erbium-doped fiber ntau tsim hluav taws xob tsim hluav taws xob nyob rau hauv qhov kev txiav txim ntawm lub teeb pom kev zoo (wavelength 980nm lossis 1480nm), thiab lub teeb hluav taws xob hloov pauv nrog kev hloov pauv ntawm lub teeb liab teeb liab, uas yog sib npaug rau amplifying lub teeb pom kev zoo. Cov txiaj ntsig tau pom tias qhov nce ntawm Erbium-doped fiber ntau amplifier feem ntau yog 15-40db, thiab qhov kev ncua deb tuaj yeem nce ntau dua 100km. Yog li, tib neeg tsis tuaj yeem pab tab sis nug: vim li cas cov kws tshawb fawb tau xav txog kev siv doped erbium hauv fiber ntau amplifier kom muaj zog ntawm lub teeb nthwv dej? Peb paub tias erbium yog lub ntiaj teb tsis tshua muaj, thiab cov ntsiab lus tsis tshua muaj hauv ntiaj teb muaj lawv cov yam ntxwv tshwj xeeb. Doping tsis tshua muaj lub ntiaj teb cov ntsiab lus hauv cov khoom siv kho qhov muag tau siv ntev los txhim kho kev ua haujlwm ntawm cov khoom siv kho qhov muag, yog li qhov no tsis yog qhov xwm txheej. Tsis tas li ntawd, vim li cas lub wavelength ntawm lub twj tso kua mis lub teeb qhov chaw raug xaiv ntawm 980nm lossis 1480nm? Qhov tseeb, lub wavelength ntawm lub twj tso kua mis lub teeb qhov chaw tuaj yeem yog 520nm, 650nm, 980nm, thiab 1480nm, tab sis kev xyaum tau ua pov thawj tias lub wavelength ntawm 1480nm twj tso kua mis lub teeb qhov chaw laser efficiency yog siab tshaj, ua raws li lub wavelength ntawm 980nm twj tso kua mis lub teeb qhov chaw.
Lub cev qauv
Cov qauv yooj yim ntawm erbium-doped fiber ntau amplifier (EDFA Optical Amplifier). Muaj ib qho kev rho tawm ntawm qhov kawg ntawm qhov kev tawm tswv yim thiab cov zis kawg, lub hom phiaj yog ua kom lub teeb pom kev zoo ib-txoj kev kis tau tus mob. Lub twj tso kua mis exciter muaj lub wavelength ntawm 980nm lossis 1480nm thiab siv los muab lub zog. Kev ua haujlwm ntawm lub coupler yog ob peb lub tswv yim kho qhov muag teeb liab thiab lub teeb lub teeb rau hauv erbium-doped fiber ntau, thiab hloov lub zog ntawm lub twj tso kua mis lub teeb rau lub teeb liab input optical los ntawm qhov kev txiav txim ntawm erbium-doped fiber ntau, thiaj li paub txog lub zog amplification ntawm input optical teeb liab. Txhawm rau kom tau txais cov khoom siv hluav taws xob ntau dua thiab cov suab nrov qis dua, Erbium-doped fiber ntau amplifier siv hauv kev xyaum txais cov qauv ntawm ob lossis ntau lub twj tso kua mis nrog cov khoom sib cais hauv nruab nrab kom sib cais. Txhawm rau kom tau txais qhov dav dav thiab flatter nce nkhaus, qhov nce flattening lim tau ntxiv.
EDFA muaj tsib qhov tseem ceeb: Erbium-doped fiber (EDF), Optical coupler (WDM), optical isolator (ISO), Optical Filter, thiab Pumping Supply. Feem ntau siv cov twj tso kua mis muaj xws li 980nm thiab 1480nm, thiab ob lub twj tso kua mis no muaj kev siv ntau dua thiab siv ntau dua. 980nm twj tso kua mis lub teeb lub suab nrov coefficient qis dua; Lub 1480nm twj tso kua mis lub teeb qhov chaw muaj kev siv ntau dua thiab tuaj yeem tau txais lub zog tso zis ntau dua (txog 3dB siab dua li 980nm lub teeb pom kev zoo).
qhov zoo
1. Kev khiav hauj lwm wavelength yog raws li qhov tsawg kawg nkaus attenuation qhov rais ntawm ib hom fiber ntau.
2. High coupling efficiency. Vim nws yog fiber ntau amplifier, nws yooj yim rau coupling nrog cov kis tau tus mob fiber.
3. High zog conversion efficiency. Lub hauv paus ntawm EDF yog me dua li ntawm kev sib kis fiber ntau, thiab cov teeb liab teeb thiab lub teeb pom kev zoo tau xa mus ib txhij hauv EDF, yog li lub peev xwm kho qhov muag tau muaj zog heev. Qhov no ua rau kev sib cuam tshuam ntawm lub teeb thiab qhov nce nruab nrab Er ion puv, ua ke nrog qhov tsim nyog ntev ntawm erbium-doped fiber ntau, yog li kev hloov pauv ntawm lub teeb lub zog siab.
4. Kev nce siab, qis suab nrov Performance index, loj tso zis zog, tsawg crosstalk ntawm raws.
5. Cov yam ntxwv nce ruaj khov: EDFA tsis hnov mob rau qhov kub thiab txias, thiab qhov nce tau muaj kev cuam tshuam me ntsis nrog polarization.
6. Qhov nce feature yog ywj siab ntawm qhov system me ntsis tus nqi thiab cov ntaub ntawv hom.
ua tsis tau
1. Cov nyhuv nonlinear: EDFA ua kom lub zog kho qhov muag los ntawm kev ua kom lub zog kho qhov muag tau txhaj rau hauv fiber ntau, tab sis qhov loj dua qhov zoo dua. Thaum lub zog kho qhov muag tau nce mus rau qee qhov, cov nyhuv nonlinear ntawm optical fiber yuav raug tsim. Yog li ntawd, thaum siv optical fiber amplifiers, yuav tsum tau them nyiaj mloog mus rau tus nqi ntawm kev tswj ib leeg-channel incoming fiber optical zog.
2. Qhov nce wavelength ntau yog tsau: qhov ua haujlwm wavelength ntau ntawm C-band EDFA yog 1530nm ~ 1561nm; Kev ua haujlwm wavelength ntau ntawm L-band EDFA yog 1565nm ~ 1625nm.
3. Tsis sib npaug nce bandwidth: Qhov nce bandwidth ntawm EDFA erbium-doped fiber ntau amplifier yog dav heev, tab sis qhov nce spectrum ntawm EDF nws tus kheej tsis tiaj. Qhov nce flattening lim yuav tsum tau saws kom flatten qhov nce hauv WDM system.
4. Lub teeb surge teeb meem: Thaum txoj kev teeb pom kev zoo li qub, lub erbium ions zoo siab los ntawm lub teeb pom kev zoo yog nqa tawm los ntawm lub teeb liab teeb liab, yog li ua tiav qhov amplification ntawm lub teeb liab teeb. Yog hais tias lub teeb input raug txiav, vim hais tias cov metastable erbium ions txuas ntxiv mus, thaum lub teeb liab teeb pom kev zoo rov qab los, lub zog yuav dhia, ua rau lub teeb surge.
5. Txoj kev daws teeb meem ntawm qhov muag pom kev yog kom paub qhov tsis siv neeg kho qhov muag txo qis (APR) lossis tsis siv neeg kho qhov muag tawm (APSD) muaj nuj nqi hauv EDFA, uas yog, EDFA cia li txo lub hwj chim lossis txiav tawm lub hwj chim thaum tsis muaj teeb pom kev zoo, yog li inhibiting qhov tshwm sim ntawm qhov tshwm sim surge.
Daim ntawv thov hom
1. Lub booster Amplifier yog siv los txhawb lub zog ntawm ntau lub wavelength signals tom qab lub booster nthwv dej, thiab xa mus rau lawv. Txij li thaum lub teeb liab lub zog tom qab lub zog nthwv dej feem ntau yog qhov loj, qhov ntsuas suab nrov thiab qhov nce ntawm lub hwj chim amplifier tsis siab heev. Muaj kuj loj tso zis zog.
2. Kab-amplifier, tom qab lub hwj chim Amplifier, yog siv los ua ntu zus los them cov kab xa tawm tsis zoo, feem ntau yuav tsum muaj lub suab nrov me me thiab cov khoom siv kho qhov muag loj.
3. Pre-Amplifier: Ua ntej lub splitter thiab tom qab kab amplifier, nws yog siv los amplify lub teeb liab thiab txhim kho lub rhiab heev ntawm lub receiver (nyob rau hauv cov ntaub ntawv uas lub optical teeb liab-rau-noise ratio (OSNR) ua tau raws li qhov yuav tsum tau, lub input zog loj yuav suppress lub suab nrov ntawm lub receiver nws tus kheej thiab txhim kho qhov tau txais rhiab heev), thiab lub suab nrov heev. Tsis muaj qhov xav tau zoo ntawm lub zog tso zis.
Post lub sij hawm: Mar-17-2025