Te kaupapa me te whakamahinga oEDFA erbium-doped fiber amplifier
Ko te hanganga taketake oEDFAwhakakaha muka erbium-doped, e te nuinga tito o te reo kaha (tatini mita te roa doped muka kiripaka, matua diameter 3-5 microns, doping kukū (25-1000)x10-6), papu puna marama (990 ranei 1480nm LD), whatu coupler me whatu whakawehe. Ka taea e te rama tohu me te rama papu te toha i roto i te huarahi kotahi (te maminga tahi), te anga kee (whakamuri whakamuri), nga ahunga e rua ranei (bidirectional pumping) i roto i te muka Erbium. I te wa e werohia ana te rama tohu me te rama papu ki roto i te muka erbium i te wa ano, ka hikaka te katote erbium ki te taumata teitei o te kaha (te punaha taumata-toru) i raro i te mahi a te rama papu, ka mutu ka pirau ki te taumata metastable. Ka hoki ki te whenua i raro i te mahi a te rama tohu maiki, ka tukuna te whakaahua e rite ana ki te rama tohu, kia kaha ake ai te tohu. Ko tana awhiowhio (ASE) kua whakakaha ake he whanui whanui (tae atu ki te 20-40nm) ka rua nga tihi e rite ana ki te 1530nm me te 1550nm.
Ko nga painga matua oWhakanuia EDFAhe nui te whiwhinga, te nui o te bandwidth, te kaha whakaputa teitei, te pai o te kumara, te iti o te mate whakaurunga, me te kore e aro ki nga ahuatanga polarization.
Ko te kaupapa mahi o te whakakaha muka erbium-doped
Ko te whakakorikori muka Erbium-doped（EDFA Optical Amplifier） Ko te nuinga he muka erbium-doped (tata ki te 10-30m te roa) me te puna marama papu. Ko te kaupapa mahi ko te muka erbium-doped e whakaputa ana i te iraruke whakahihiko i raro i te mahi a te puna marama maemaa (te roangaru 980nm, 1480nm ranei), me te huringa o te rama ka huri i te huringa o te tohu rama whakauru, he rite ki te whakanui i te tohu rama whakauru. Ko nga hua e whakaatu ana ko te whiwhinga o te whakakaha muka Erbium-doped ko te nuinga o te 15-40db, a ka taea te whakanui ake i te tawhiti o te rei ma te neke atu i te 100km. Na, kare e taea e te tangata te patai: he aha te take i whakaaro ai nga kaiputaiao ki te whakamahi i te erbium doped i roto i te whakakaha muka hei whakanui ake i te kaha o nga ngaru marama? E mohio ana matou he huānga whenua onge te erbium, a, ko nga huānga whenua onge te ahua motuhake o te hanganga. Kua roa te whakamahi doping huānga whenua onge i roto i nga taputapu whatu ki te whakapai ake i te mahi o nga taputapu whatu, no reira ehara tenei i te take ohorere. I tua atu, he aha i whiriwhiria ai te roangaru o te puna marama papu i te 980nm, 1480nm ranei? Ko te tikanga, ko te roangaru o te puna marama papu ka taea te 520nm, 650nm, 980nm, me te 1480nm, engari kua whakamatauhia e nga mahi ko te roangaru o te 1480nm papu rama rama te kaha o te laser ko te teitei rawa atu, ka whai ake ko te roangaru o te 980nm papu puna marama.
Te hanganga tinana
Hanganga taketake o te whakakaha muka erbium-doped（EDFA Optical Amplifier）. He kaiwehewehe i te pito whakauru me te mutunga putanga, ko te kaupapa ko te tuku i te tohu whatu kia kotahi-ara te tuku. Ko te exciter papu he roangaru o 980nm, 1480nm ranei ka whakamahia hei whakarato i te kaha. Ko te mahi a te kaihonohono ko te hono i te tohu whakaata whakaurunga me te rama papu ki roto i te muka erbium-doped, me te whakawhiti i te kaha o te rama papu ki te tohu whatu whakauru na roto i te mahi o te muka erbium-doped, kia mohio ai te kaha o te kaha o te whakaurunga tohu tohu. Kia whiwhi ai i te mana whatu whakaputa teitei ake me te taupae haruru iti, ko te whakahiato muka Erbium-doped e whakamahia ana i roto i nga mahi ka tango i te hanganga o nga puna papu e rua, neke atu ranei me nga kaiwehe i waenganui hei wehe tetahi ki tetahi. Kia whiwhi ai koe i te anau whiwhinga whanui ake me te papatahi, ka taapirihia he tātari whakamaarama taonga.
E rima nga waahanga matua o te EDFA: Erbium-doped fiber (EDF), Optical coupler (WDM), optical isolator (ISO), Optical Filter, me te Pumping Supply. Ko nga puna papu e whakamahia nuitia ana ko te 980nm me te 1480nm, a ko enei puna papu e rua he teitei ake te pai o te papu me te whakamahia ake. 980nm papu marama puna haruru whakarea he iti; Ko te puna marama papu 1480nm he teitei ake te pai o te pupuhi ka taea te whiwhi mana whakaputa nui ake (mo te 3dB teitei ake i te puna marama papu 980nm).
painga
1. Ko te roangaru whakahaere e rite ana ki te iti rawa o te matapihi attenuation o te muka aratau kotahi.
2. Te pai o te honohono. Na te mea he whakakaha muka, he ngawari ki te hono ki te muka tuku.
3. Te kaha o te hurihanga kaha. Ko te matua o te EDF he iti ake i tera o te muka whakawhiti, a ko te rama tohu me te rama papu ka tukuna i te wa kotahi i roto i te EDF, na reira ka tino kaha te kaha o te mata. Ma tenei ka tino ki tonu te tauwhitinga i waenga i te marama me te katote Er katoi, ka honoa ki te roa e tika ana o te muka erbium-doped, no reira he tiketike te kaha o te hurihanga o te kaha marama.
4. He nui te whiwhi, he iti te taurangi haruru, he mana whakaputa nui, he iti te whakawhiti korero i waenga i nga awa.
5. Ko nga ahuatanga whiwhi pumau: Ko te EDFA kaore e aro ki te pāmahana, he iti te hononga o te taonga ki te polarization.
6. He motuhake te ahua o te whiwhinga i te reiti moka o te punaha me te whakatakotoranga raraunga.
ngoikoretanga
1. Te paanga kore: Ko te EDFA te whakanui ake i te mana whatu ma te whakanui ake i te mana whatu i werohia ki te muka, engari ko te nui ake ka pai ake. Ka piki ake te mana whatu ki tetahi whānuitanga, ka puta te paanga kore o te muka whatu. Na reira, i te wa e whakamahi ana i nga whakakaha muka whatu, me aro ki te uara o te whakahaere i te hongere kotahi te hiko o te muka whatu.
2. Kua whakaritea te awhe roangaru whiwhi: ko te roangaru mahi a C-band EDFA ko 1530nm ~ 1561nm; Ko te awhe roangaru mahi o L-band EDFA ko 1565nm~1625nm.
3. Kore orite te whiwhi bandwidth: He tino whanui te whakahiatotanga o te whakahiato muka erbium-doped EDFA, engari ko te awhi o EDF ake kaore i te papatahi. Me tango te tātari whakapati hua ki te whakapati i te hua i roto i te punaha WDM.
4. Te raruraru o te pupuhi marama: I te wa e tika ana te ara marama, ko nga katote erbium e hikaka ana i te rama papu ka haria atu e te rama tohu, na reira ka oti te whakanui i te rama tohu. Mena ka tapahia te rama whakauru, na te mea kei te whakaemi tonu nga katote erbium metatable, ina whakahokia mai te whakauru rama tohu, ka peke te kaha, ka puta he ngako marama.
5. Ko te otinga ki te ngaru whatu ko te mohio ki te whakahekenga hiko whatu aunoa (APR) ranei te mana whatu aunoa (APSD) mahi i roto i te EDFA, ara, EDFA whakaiti aunoa i te mana ranei whakaweto aunoa i te mana karekau he rama whakauru, na reira ka pehi i te puta mai o te ahuatanga o te ngaru.
Aratau tono
1. Ka whakamahia te Whakanui Whakanuia hei whakanui i te kaha o nga tohu roangaru maha i muri i te ngaru whakanui, katahi ka tuku. I te mea he nui te mana tohu i muri i te ngaru whakanui, kaore i te tino teitei te tohu haruru me te whiwhinga o te whakakaha hiko. He nui te mana whakaputa.
2. Raina-whakakaha, i muri i te Power Amplifier, ka whakamahia ki te utu i ia wa i te mate tuku Raina, te tikanga me te taupū haruru iti me te mana whatu whakaputa nui.
3. Pre-Amplifier: I mua i te wehenga me muri i te kaha o te raina, ka whakamahia hei whakanui ake i te tohu me te whakapai ake i te aro o te kaiwhiwhi (i te mea ka tutuki te tohu tohu-ki-haruru (OSNR) i nga whakaritenga, ka taea e te kaha whakauru nui te pehi i te haruru o te kaiwhiwhi ake me te whakapai ake i te tohu o te whiwhinga), me te iti rawa o te haruru. Kaore he whakaritenga nui mo te mana whakaputa.
Te wa tuku: Maehe-17-2025