1. whakarōpūtanga oFipereAwhakakaha
E toru nga momo matua whakakaha whatu:
(1) Semiconductor Optical Amplifier (SOA, Semiconductor Optical Amplifier);
(2) Ko nga whakakaha muka whatu kua whakakiia ki nga huānga whenua onge (erbium Er, thulium Tm, praseodymium Pr, rubidium Nd, me etahi atu), te nuinga o nga whakakaha muka erbium-doped (EDFA), me te thulium-doped fiber amplifiers (TDFA) me te praseodymium-doped fiber amplifiers (PDFA), etc.
(3) Ko nga whakakaha muka kore, ko te nuinga o te muka Raman amplifiers (FRA, Fiber Raman Amplifier).Ko te whakataurite mahi matua o enei whakakaha whatu e whakaatuhia ana i te ripanga
EDFA (Erbium Doped Fiber Amplifier)
Ka taea te hanga i tetahi punaha laser taumata-maha ma te doping i te muka kiripaka me nga huānga whenua onge (pēnei i te Nd, Er, Pr, Tm, me etahi atu), ka whakakaha tika te rama tohu whakauru i raro i te mahi a te rama papu.I muri i te tuku urupare tika, ka hangaia he laser muka.Ko te roangaru mahi o te Nd-doped fiber amplifier he 1060nm me te 1330nm, a he iti tona whanaketanga me tana tono na te rereke mai i te tauranga totohu pai rawa atu o te whakawhitiwhiti korero muka me etahi atu take.Ko nga roangaru whakahaere o te EDFA me te PDFA kei roto i te matapihi o te iti rawa o te mate (1550nm) me te kore o te roangaru whakamararatanga (1300nm) o te whakawhitiwhiti korero muka, me te TDFA e mahi ana i roto i te S-band, he mea tino pai mo nga tono punaha whakawhitiwhiti muka. .Ina koa ko te EDFA, te whanaketanga tere rawa, kua whai kiko.
Ko tePTuhinga o mua EDFA
Ko te hanganga taketake o te EDFA e whakaatuhia ana i te Whakaahua 1(a), ko te nuinga o te mea ko te reo kaha (te muka silica-doped erbium mo te tekau mita te roa, me te diameter matua o te 3-5 microns me te kukū doping o (25). -1000)x10-6), te puna marama papu (990, 1480nm LD ranei), te hono whatu me te whakawehe whatu.Ka taea e te rama tohu me te rama papu te toha i roto i te huarahi kotahi (te maminga takirua), nga huarahi rereke (whakamuri whakamuri), nga huarahi e rua ranei (te maminga rua) 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 koa nga katote erbium ki te taumata kaha teitei i raro i te mahi a te rama papu (Whakaahua 1 (b), he punaha taumata-toru), ka tere te pirau ki te taumata o te kaha metatable, ka hoki mai ki te whenua i raro i te mahi a te rama tohu maiki, ka tukuna e ia nga whakaahua e rite ana ki te rama tohu, kia kaha ake ai te tohu.Ko te ahua 1 (c) ko tana awhiowhio whakakaha mahorahora (ASE) me te whanui whanui (tae atu ki te 20-40nm) me nga tihi e rua e rite ana ki te 1530nm me te 1550nm.
Ko nga painga nui o te EDFA ko te nui o te whiwhinga, te nui o te bandwidth, te kaha whakaputa teitei, te pai o te papu, te iti o te whakauru whakauru, me te kore e aro ki te ahua polarization.
2. Nga Raruraru mo nga Whakanuia Whakanuia
Ahakoa he maha nga painga o te whakakaha whatu (ina koa ko te EDFA), ehara i te mea tino pai.I tua atu i te haruru taapiri e whakaiti ana i te SNR o te tohu, tera ano etahi atu ngoikoretanga, penei:
- Ko te kore e taurite o te awhiowhiowhiowhiowhiowhiowhiowhiowhiowhio whakakaha e pa ana ki nga mahi whakakaha-maha;
- I te wa e whakahekehia ana nga whakakaha whatu, ka whakaemihia nga paanga o te haruru ASE, te marara muka me nga paanga kore raina.
Me whai whakaaro enei take i roto i te tono me te hoahoa punaha.
3. Te Whakamahinga o te Whakanui Whakanuia i roto i te Pūnaha Whakawhitiwhiti Fiber Optical
I roto i te pūnaha whakawhitiwhiti muka whatu, teWhakanui Arotika Fiber OpticalKa taea te whakamahi ehara i te mea hei whakanui i te kaha o te kaiwhakawhiti ki te whakanui ake i te mana tuku, engari ano hoki hei preamplifier o te kaiwhiwhi ki te whakapai ake i te maaramatanga o te whiwhinga, ka taea hoki te whakakapi i te tukurua tukurua-a-hiko-ahua, ki te whakawhānui i te tuku. tawhiti me te mohio ki te whakawhitiwhiti whakaaro-a-whatu.
I roto i nga punaha korero muka whatu, ko nga mea matua e aukati ana i te tawhiti tuku ko te mate me te marara o te muka whatu.Ma te whakamahi i te puna marama whaiti, te mahi tata ranei ki te roangaru marara kore, he iti te awe o te marara muka.Karekau tenei punaha e hiahia ki te mahi i nga wa katoa o te wa tohu (relay 3R) ki ia teihana reera.He rawaka ki te whakakaha tika i te tohu whatu me te whakakaha whatu (1R relay).Ka taea te whakamahi i nga whakakaha orotika ehara i te mea anake i roto i nga punaha pouaka tawhiti-tawhiti engari i roto i nga whatunga tohatoha muka whatu, ina koa i roto i nga punaha WDM, ki te whakanui i nga waahana maha i te wa kotahi.
1) Te Whakamahinga o nga Whakanui Whakanuia i roto i nga punaha Whakawhitiwhiti Whakawhitinga Whakawhitiwhiti Optical Optical
Ko te 2 he hoahoa hoahoa o te tono o te whakakaha whatu i roto i te punaha korero muka whatu kātua.(a) e whakaatu ana te pikitia e whakamahia ana te whakakaha whatu hei whakakorikori hiko o te kaitawhiti me te whakakoi o mua o te kaikawe kia rererua te tawhiti kore-relay.Hei tauira, te tango i te EDFA, te tuku punaha Ko te tawhiti o te 1.8Gb/s ka piki mai i te 120km ki te 250km, tae noa ki te 400km.Ko te ahua 2 (b)-(d) ko te whakamahinga o nga whakakaha whatu i roto i nga punaha relay-maha;Ko te ahua (b) te aratau tuku 3R tawhito;Ko te ahua (c) ko te aratau rei whakauru o te tukurua 3R me te whakakaha whatu;Whakaahua 2 (d) He aratau rei whatu-katoa;i roto i te punaha korero-a-whatu katoa, kaore i te whakauru i nga waahi me nga waahi whakaora, na reira he marama-marama, a kaore he herenga "haehae pounamu hiko".I te mea ka whakakapihia nga taputapu tuku me te tango i nga pito e rua, He mea ngawari ki te whakahou mai i te reiti iti ki te reiti teitei, a kaore e hiahiatia kia whakakapihia te whakakaha whatu.
2) Te Whakamahinga Whakanui Whakanuia i roto i te Whatunga Tohatoha Fiber Optical
Ko nga painga o te whakaputa hiko teitei o nga whakakaha whatu (ina koa te EDFA) he tino whai hua ki nga whatunga tohatoha aunui (penei i teCATVWhatunga).Ko te whatunga CATV tuku iho ka tango i te taura coaxial, me whakakaha ake ia rau mita, a ko te radius ratonga o te whatunga he 7km.Ko te whatunga CATV muka whatu e whakamahi ana i nga amplifiers whatu e kore e taea te whakanui noa i te maha o nga kaiwhakamahi kua tohatohahia, engari ka nui haere te huarahi whatunga.Kua whakaatuhia e nga whanaketanga o tata nei ko te tohatoha o te muka whatu/hybrid (HFC) e kukume ana i nga kaha o nga mea e rua me te kaha whakataetae.
Ko te ahua 4 he tauira o te whatunga tohatoha muka whatu mo te whakarereke AM-VSB o nga hongere TV 35.Ko te puna marama o te kaiwhakawhiti ko DFB-LD me te roangaru o 1550nm me te mana whakaputa o 3.3dBm.Ma te whakamahi i te EDFA 4-taumata hei whakanui i te tohatoha hiko, ko tona kaha whakauru he tata ki te -6dBm, a ko tana mana whakaputa e pa ana ki te 13dBm.Te tairongo kaikawe whatu -9.2d Bm.I muri i nga taumata 4 o te tohatoha, kua tae te katoa o nga kaiwhakamahi ki te 4.2 miriona, a ko te huarahi whatunga he neke atu i te tekau kiromita.Ko te tauwehenga tohu-ki-haruru o te whakamatautau he nui ake i te 45dB, a, kaore a EDFA i whakaiti i te CSO.
Te wa tuku: Apr-23-2023