EDFA erbium-doped fiber ntau lub zog ua kom pom zoo:
1. Lub koob txuas ntxiv nyob tom qab ntawm kev sib tsoo, uas yog siv los txhim kho lub zog ntawm ntau txoj kab hluav taws xob tom qab sib txuas, thiab tom qab ntawd xa mus,
Yog li no, qhov yuav tsum tau ua ntawm lub suab nrov thiab qhov nce ntawm lub zog txuas ntxiv tsis yog siab heev, tab sis nws yuav tsum muaj qhov tawm ntawm cov hluav taws xob loj tom qab ua kom nrov nrov.
2. Cov kab txuas ntxiv yog tom qab cov fais fab amplifier, uas yog siv qee lub sij hawm them qee qhov xa kis poob. Feem ntau, nws xav tau lub suab qis thiab lub suab tawm hluav taws xob muaj zog.
3. Lub tso suab ua ntej yog nyob rau hauv pem hauv ntej ntawm txoj kev faib tawm thiab tom qab ntawm cov kab amplifier, uas yog siv rau cov teeb liab ua kom nrov tau txhim kho qhov rhiab siab ntawm tus txais (nyob rau hauv cov xwm txheej uas qhov ntsuas hluav taws xob-rau-suab piv (OSNR) ua tau raws li qhov yuav tsum tau ua, lub zog loj dua tuaj yeem txhawb lub suab nrov ntawm tus txais nws tus kheej thiab txhim kho qhov rhiab ntawm tus txais). Lub suab nrov tau me me, thiab lub zog tsim tawm tsis tas yuav ntau dhau lawm.
EDFA fiber ntau lub tshuab hluav taws xob tseem hu ua erbium-doped fiber ntau lub zog, nws yog qhov kev cuam tshuam loj hauv kev siv tshuab kev sib txuas lus fiber ntau, vim tias nws tuaj yeem ncaj qha ua kom muaj zog ntawm cov hluav taws xob tsis muaj zog tsis muaj los ntawm cov txheej txheem hluav taws xob kho qhov muag hloov pauv. Ntxiv rau, koj puas paub dab tsi txog EDFA fiber ntau lub zog txuas ntxiv?
Vim li cas ho siv EDFA fiber ntau lub zog?
Muaj ntau ntau pab pawg sib txawv hauv cov txheej txheem kis ntawm cov khoom siv fiber ntau, xws li C-band (1530nm-1560nm) thiab L-band (1560nm-1600nm). Vim tias qhov yoj yoj ntawm cov kab sib txawv yog qhov sib txawv, kev sib txuas lus yuav cuam tshuam, yog li nws tsim nyog los ua kom nrov dua tus ntoo khaub lig channel ntawm qhov kho qhov muag fiber txuas kom paub meej cov kev sib txuas lus zoo.
EDFA fiber ntau lub zog ua kom tau raws li qhov kev thov no, nws tuaj yeem siv cov khoom siv fiber ntau ua qhov nruab nrab kom ua kom nruab nrab lub teeb liab kho qhov muag, ua kom nrov ntau qhov yoj yoj (1500nm-1600nm), txaus ua kom nrov loj rau cov ntaub ntawv channel nrog cov ntaub ntawv siab tshaj. Tus cwj pwm no tuaj yeem ua lub luag haujlwm tseem ceeb hauv WDM multi-channel optical kis tau tus mob, thiab yog li ntawd thiaj dhau los ua qhov tsis tseem ceeb ntawm WDM system.
Qhov zoo ntawm EDFA fiber ntau lub zog
Ntxiv rau qhov tau hais los saum toj no tsis tas yuav tsum mus los ntawm kev siv hluav taws xob kho qhov muag hluav taws xob cov txheej txheem hloov pauv, EDFA fiber ntau lub tshuab hluav taws xob tseem muaj qhov zoo li nram no:
EDFA fiber ntau amplifier muaj qhov nce ntxiv. Qhov nce tus nqi ntawm cov khoom siv fiber ntau yog ib qho ntawm cov ntsuas tseem ceeb. Qhov zoo dua fiber ntau amplifier tuaj yeem ncav cuag 33dB, thaum EDFA fiber ntau lub zog rub kom dav yog li 30 ~ 40dB, uas muaj kev nce siab dua.
Lub suab nrov ntawm EDFA fiber ntau lub tshuab ua kom muaj zog me me. EDFA fiber ntau lub zog ua kom nrov nrov ua suab nrov, yog li nws lub suab nrov qis dua li ntawm qhov dav dav, feem ntau 4 ~ 7dB.
Kev siv bandwidth ntawm EDFA fiber ntau lub tshuab ua kom dav dua. EDFA fiber ntau lub zog muaj qhov sib xyaw ntawm 20 ~ 40nm ntawm 1550nm, uas tuaj yeem nqa tawm ntau txoj kab sib kis thiab nce lub peev xwm kis tau.
EDFA fiber ntau lub zog ua kom muaj qhov poob qis. Ua haujlwm nthwv dej ntawm EDFA fiber ntau lub tshuab ua kom zoo yog tsuas yog cov pab pawg zoo tshaj (1500 ~ 1600nm) rau kev sib txuas lus fiber ntau, uas yog cov chaw poob qis tshaj, yog li EDFA fiber amplifier muaj qhov poob qis thiab qhov kev sib kis ntev.
Daim ntawv thov ntawm EDFA fiber ntau lub zog
1. Optical fiber thaiv kab ke
2．FTTX 、 FTTH
3. DWDM kev sib txuas lus kho qhov muag sib txuas
4. Yeeb yaj kiab kho qhov muag kis tau tus mob thiab CATV
5. Kev sib kis ntev ntawm Analog& amp; Digital CATV lub teeb liab kho qhov muag
Cov teeb meem ntawm optical amplifier
Txawm hais tias optical amplifier (tshwj xeeb tshaj yog EDFA) muaj ntau qhov ua tau zoo, nws tsis yog qhov tshwj xeeb amplifier. Ntxiv rau lub suab nrov ntxiv uas ua rau SNR ntawm lub teeb liab poob qis, muaj qee qhov lwm yam tsis txaus, xws li:
Qhov nce spectrum nyob rau hauv bandwidth ntawm lub amplifier yog tsis tiaj tus, uas cuam tshuam rau kev ua tau zoo ntawm cov channel ntau amplifier;
Qhov cuam tshuam ntawm cov suab nrov ASE, fiber dispersion thiab cov teebmeem nonlinear yuav sib sau thaum optical amplifiers cascaded.
Cov teeb meem no yuav tsum tau xav txog hauv kev siv thiab qauv tsim.
Daim ntawv thov ntawm lub tshuab hluav taws xob kho qhov muag loj hauv cov kab ke sib txuas lus fiber ntau
Hauv kev sib txuas lus hauv cov kab hluav taws xob, cov tshuab hluav taws xob kho kom zoo dua tuaj yeem siv tsis yog lub zog txuas ntawm lub zog los txhim kho lub zog sib kis, tab sis kuj tseem ua tus piv txwv ntawm cov txais kom txhim kho qhov tau txais kev hnov mob. Nws tseem tuaj yeem hloov qhov qub hluav taws xob kho qhov muag hluav taws xob ua kom rov txuas tau qhov kev sib kis thiab paub tag nrho cov khoom sib txuas lus.
Hauv qhov khoos phis tawm ntawm cov kab hluav taws xob, qhov tseem ceeb tshaj plaws ua kom dhau qhov kev sib kis yog qhov poob thiab tawg ntawm cov hluav taws xob fiber ntau. Siv cov kab hluav taws xob nqaim kab hluav taws xob los yog ua haujlwm ze ntawm xoom dispersion wavelength, qhov cuam tshuam ntawm fiber ntau dispersion yog me me. Lub kaw lus no tsis xav tau lub teeb liab ua tiav lub sijhawm tsim dua tshiab (3R relay) ntawm txhua lub chaw nres tsheb. Nws yog qhov txaus los ua kom nrov dua lub teeb liab kho qhov muag ncaj qha nrog optical amplifier (1R relay). Optical amplifier siv tsis tau tsuas yog nyob rau hauv kev sib tw deb ntev lub cev kab, tab sis kuj nyob rau hauv optical fiber faib network, tshwj xeeb tshaj yog nyob rau hauv WDM system rau ntau-channel ib txhij amplification.
Nruab nrog bipolar kev ua tau zoo 980nm& amp; 1480 twj tso kua mis laser (rau lub npe nrov thoob ntiaj teb hom suab nrov twj tso kua mis laser) thiab ua haujlwm siab erbium-doped fiber ntau, nws muaj cov yam ntxwv ntawm kev tsis sib txig, suab nrov tsawg, muaj kev ntseeg siab, zoo ruaj khov, compact thiab hloov tau qauv. Txhawm rau kom tsis txhob muaj kev puas tsuaj rau lub qhov muag tshwm sim los ntawm laser nyob rau hauv cov txheej txheem ntawm kev siv, cov khoom siv sib txuas ntawm EDFA fiber amplifier muaj qhov qaij kaum, thiab nws tau nruab nrog cov cua sov ua kom sov thiab cov khoom siv cua, uas tuaj yeem ua kom lub neej ntev kev pab cuam.
HTF' s cov khoom lag luam zoo tau lees tias, thiab cov khoom siv siv tau yog txawv txawv.
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