Isimiso kanye nokusetshenziswa kweI-EDFA erbium-doped fibre amplifier
Isakhiwo esiyisisekelo seEDFAi-erbium-doped fibre amplifier, ehlanganiswe ngokuyinhloko i-medium esebenzayo (inqwaba yamamitha ubude be-quartz fibre, i-core diameter 3-5 microns, i-doping concentration (25-1000) x10-6), umthombo wokukhanya wephampu (990 noma 1480nm LD), i-optical coupler ne-optical isolator. Ukukhanya kwesignali nokukhanya kwepompo kungasakazekela ohlangothini olufanayo (ukumpompa ngokuhlanganyela), ukuphamba okuphambene (ukuphampa okubuyela emuva), noma zombili izinkomba (ukumpompa okuqondiswa kabili) ku-fiber ye-Erbium. Lapho ukukhanya kwesignali nokukhanya kwepompo kufakwa ku-erbium fibre ngesikhathi esifanayo, i-ion ye-erbium ijabulela izinga eliphezulu lamandla (uhlelo lwamazinga amathathu) ngaphansi kwesenzo sokukhanya kwephampu, futhi ngokushesha ibole ibe yizinga le-metastable. Uma ibuyela esimweni esiphansi ngaphansi kwesenzo sokukhanya kwesignali yesigameko, i-photon ehambisana nokukhanya kwesignali iyakhishwa, ukuze isignali ikhuliswe. I-amplified spontaneous emission (ASE) spectrum yayo inomkhawulokudonsa omkhulu (ofika ku-20-40nm) futhi ineziqongo ezimbili ezihambisana ne-1530nm kanye ne-1550nm ngokulandelanayo.
Izinzuzo eziyinhloko zeI-EDFA amplifierinzuzo ephezulu, umkhawulokudonsa omkhulu, amandla okukhipha okuphezulu, ukusebenza kahle kokumpompa okuphezulu, ukulahleka kokufakwa okuphansi, nokungezwani ezifundeni ze-polarization.
Umgomo wokusebenza we-erbium-doped fiber amplifier
I-Erbium-doped fiber amplifier.I-EDFA Optical Amplifier） ikakhulukazi yakhiwe i-erbium-doped fiber (cishe ubude obuyi-10-30m) kanye nomthombo wokukhanya wepompo. Isimiso sokusebenza siwukuthi i-erbium-doped fiber ikhiqiza imisebe evuselelwe ngaphansi kwesenzo somthombo wokukhanya opompowe (i-wavelength 980nm noma 1480nm), futhi ukukhanya okukhazimulayo kushintsha ngokushintsha kwesignali yokukhanya okokufaka, okulingana nokukhulisa isignali yokukhanya okokufaka. Imiphumela ikhombisa ukuthi ukuzuza kwe-Erbium-doped fiber amplifier kuvame ukuba ngu-15-40db, futhi ibanga lokudluliselana lingakhuphuka ngaphezu kuka-100km. Ngakho-ke, abantu abakwazi ukuzibamba kodwa babuze: kungani ososayensi bacabange ukusebenzisa i-doped erbium ku-fiber amplifier ukukhulisa amandla amaza okukhanya? Siyazi ukuthi i-erbium iyisici somhlaba esingavamile, futhi izakhi zomhlaba ezingavamile zinezici zazo ezikhethekile zesakhiwo. I-Doping izakhi zomhlaba ezingavamile kumadivayisi optical isetshenziswe isikhathi eside ukuthuthukisa ukusebenza kwamadivaysi optical, ngakho-ke lokhu akuyona into eyenzeka ngengozi. Ngaphezu kwalokho, kungani ubude begagasi bomthombo wokukhanya wepompo bukhethwa ku-980nm noma ku-1480nm? Eqinisweni, ubude begagasi bomthombo wokukhanya wepompo bungaba ngu-520nm, 650nm, 980nm, kanye no-1480nm, kodwa ukuzijwayeza kufakazele ukuthi ubude begagasi be-1480nm bomthombo wokukhanya we-laser bomthombo wokukhanya buphakeme kakhulu, kulandelwa ubude begagasi bomthombo wokukhanya wepompo we-980nm.
Isakhiwo somzimba
Isakhiwo esiyisisekelo se-erbium-doped fiber amplifier (EDFA Optical Amplifier) Kukhona isihlukanisi ekugcineni kokufaka kanye nesiphetho sokuphumayo, inhloso ukwenza isignali ye-optical idlulise indlela eyodwa. I-exciter yephampu inobude begagasi obungu-980nm noma u-1480nm futhi isetshenziselwa ukunikeza amandla. Umsebenzi we-coupler ukuhlanganisa isignali yokubona okokufaka kanye nokukhanya kwepompo ku-erbium-doped fibre, nokudlulisa amandla okukhanya kwephampu kusignali yokubona okokufaka ngesenzo se-erbium-doped fiber, ukuze kubonakale ukukhuliswa kwamandla kwesignali yokubona okokufaka. Ukuze kutholwe amandla okubona okukhiphayo aphezulu kanye nenkomba yomsindo ophansi, i-Erbium-doped fiber amplifier esetshenziswa ekusebenzeni yamukela ukwakheka kwemithombo yephampu emibili noma ngaphezulu enezihlukanisi phakathi ukuze ihlukanise yodwa. Ukuze uthole ijika lokuzuza elibanzi futhi eliyisicaba, isihlungi se- gain flattening siyengezwa.
I-EDFA iqukethe izingxenye ezinhlanu eziyinhloko: I-Erbium-doped fiber (EDF), i-Optical coupler (WDM), i-optical isolator (ISO), Isihlungi se-Optical, kanye Nokunikezwa Kokumpompa. Imithombo yepompo esetshenziswa ngokuvamile ihlanganisa i-980nm ne-1480nm, futhi le mithombo yephampu emibili inokusebenza kahle kokupompa okuphezulu futhi isetshenziswa kakhulu. I-980nm futha umthombo wokukhanya komthombo womsindo icoefficient iphansi; Umthombo wokukhanya wepompo we-1480nm unokusebenza kahle kokumpompa okuphezulu futhi ungathola amandla amakhulu okukhiphayo (cishe ngo-3dB ngaphezu komthombo wokukhanya wepompo we-980nm).
inzuzo
1. Ubude begagasi obusebenzayo buhambisana nefasitela lokuncisha kancane lefiber yemodi eyodwa.
2. High coupling ukusebenza kahle. Ngenxa yokuthi iyi-fiber amplifier, kulula ukuyihlanganisa ne-transmission fiber.
3. Ukusebenza kahle kokuguqulwa kwamandla. Umnyombo we-EDF mncane kunalowo wefayibha yokudlulisela, futhi ukukhanya kwesignali nokukhanya kwepompo kuhanjiswa ngesikhathi esisodwa ku-EDF, ngakho amandla okubona agxile kakhulu. Lokhu kwenza ukusebenzisana phakathi kokukhanya ne-Er ion ephakathi kokuthola kugcwale kakhulu, kuhlanganiswe nobude obufanele befayibha ye-erbium-doped, ngakho-ke ukusebenza kahle kokuguqulwa kwamandla okukhanya kuphezulu.
4. Ukuzuza okuphezulu, inkomba yomsindo ophansi, amandla amakhulu okukhiphayo, i-crosstalk ephansi phakathi kwamashaneli.
5. Izici zokuzuza okuzinzile: I-EDFA ayizweli izinga lokushisa, futhi ukuzuza kunokuhlobana okuncane ne-polarization.
6. Isici sokuzuza sizimele esilinganisweni sebhithi yesistimu nefomethi yedatha.
ukushiyeka
1. Umphumela ongaqondile: I-EDFA ikhulisa amandla okubona ngokwandisa amandla okubona ajovwe kufiber, kodwa okukhulu kuba ngcono. Lapho amandla optical anda ngezinga elithile, umphumela ongaqondile we-fiber optical uzokhiqizwa. Ngakho-ke, lapho usebenzisa ama-fiber optical amplifiers, kufanele kuqashelwe inani lokulawula amandla okukhanya kwe-fiber optical yesiteshi esisodwa.
2. Ububanzi be-wavevel benzuzo bulungisiwe: ububanzi be-wavelength obusebenzayo be-C-band EDFA ngu-1530nm~1561nm; Ububanzi be-wavelength obusebenzayo be-L-band EDFA ngu-1565nm~1625nm.
3. Umkhawulokudonsa wokuzuza ongalingani: Umkhawulokudonsa wokuzuza we-EDFA erbium-doped fiber amplifier ubanzi kakhulu, kodwa i-spectrum yokuzuza ye-EDF ngokwayo ayicaba. Isihlungi sokwenza isicaba senzuzo kufanele samukelwe ukuze sinciphise inzuzo ohlelweni lwe-WDM.
4. Inkinga yokukhanya okukhanyayo: Uma indlela yokukhanya ijwayelekile, ama-ion e-erbium ajatshuliswa ukukhanya kwepompo athathwa ukukhanya kwesignali, ngaleyo ndlela kugcwalise ukukhulisa ukukhanya kwesignali. Uma ukukhanya okokufaka kuncishisiwe, ngenxa yokuthi ama-ion e-erbium e-metastable aqhubeka nokunqwabelana, uma okokufaka kokukhanya kwesignali sekubuyiselwe, amandla azogxuma, okuholela ekukhanyeni kokukhanya.
5. Isixazululo sokuhlinzwa kwe-optical ukubona ukuncishiswa kwamandla okuzenzakalelayo (i-APR) noma umsebenzi we-othomathikhi optical off (APSD) ku-EDFA, okungukuthi, i-EDFA inciphisa ngokuzenzakalelayo amandla noma icime amandla ngokuzenzakalelayo lapho kungenakukhanya okokufaka, ngaleyo ndlela icindezela ukwenzeka kwesenzakalo sokuhlinzwa.
Imodi yohlelo lokusebenza
1. I-booster Amplifier isetshenziselwa ukukhulisa amandla amasignali amaningi we-wavelength ngemva kwegagasi elikhuthazayo, bese liwadlulisela. Njengoba amandla esignali ngemva kwegagasi le-booster ngokuvamile emakhulu, inkomba yomsindo nokuzuzwa kwesikhulisi samandla akuphezulu kakhulu. Inamandla amakhulu okukhiphayo.
2. Iamplifier kalayini, ngemva kweSikhulisi samandla, sisetshenziselwa ukunxephezela ngezikhathi ezithile ukulahleka kokudluliselwa kolayini, ngokuvamile okudinga inkomba yomsindo omncane uma kuqhathaniswa namandla amakhulu okukhiphayo.
3. I-Pre-Amplifier: Ngaphambi kwesihlukanisi nangemva kwe-amplifier yolayini, isetshenziselwa ukukhulisa isignali nokuthuthukisa ukuzwela komamukeli (esimeni lapho isilinganiso se-optical signal-to-noise ratio (OSNR) sihlangabezana nezidingo, amandla amakhulu okufaka angacindezela umsindo womamukeli ngokwawo futhi athuthukise ukuzwela kokwamukela), futhi inkomba yomsindo incane kakhulu. Asikho isidingo esikhulu emandleni okukhiphayo.
Isikhathi sokuthumela: Mar-17-2025