Ngā tohutohu motuhake mō te whakakaha muka kua tāpirihia ki te erbium (Whakakaha Whatu EDFA)
Kua hokona e koe hewhakakaha muka kua tāpirihia ki te erbium(Whakakaha Whatu EDFA) me te whakatakotoranga o te whakanui 30dB me te mana putanga kukū o te +20dBm.
Honoa te rama whakauru 0dBm ka pānuihia he putanga o te +27dBm. Ka taea e koe te tatau i te 30-3=27, ā, kāore he raruraru o te whakanui.
Engari, me pēhea mēnā ka whakauru koe i te -20dBm? Ko te tikanga o te whakanui ingoa o te 30dB me +10dBm te putanga, engari ko te inenga tuturu he +7dBm anake – he 3dB katoa te iti iho. Ehara tēnei i te take kounga. Ko te 30dB te whakanui tohu iti, ko te haruru me te tatauranga haruru ASE e pau ana i tō whakanui. Inaa, he maha ngā wā ka heke te whakanui ine i raro i te whakanui ingoa, e whakamārama ana tēnei ehara tēnei āhuatanga i te take kounga o te taputapu, engari e whakatauhia ana e te tikanga mahi o te whakakaha.
Te pikinga tohu iti ≠ te pikinga tuturu:
1. Te whakahēnga matua: Ko te pikinga e whakaaturia ana i runga i te pepa whakatakotoranga (hei tauira, 30dB) he pikinga tohu iti, koinei te uara ine pai rawa atu ina iti rawa te mana tohu tāuru (hei tauira, -20~-30dBm) me te mana papu kua whakatauria. Kāore tēnei e rite ki te pikinga tuturu ina teitei te mana tohu tāuru i roto i ngā mahi whaihua.
2. Ko te take matua mō te hekenga o te hua:
2.1 Te pikinga o te mātotoru: I te pikinga o te mana o te tohu tāuru, ka piki te EDFAWhakakaha Whatuka tomo ki te rohe kukū, ka heke te whakanui mai i tōna uara mōrahi.
2.2 Te Hurihanga o te Haruru ASE: Ka whakataetae te haruru tukunga ohorere (ASE) ki te rama tohu, ā, ka pau te mana papu iti. Ko te kaha ake o te haruru ASE, ko te iti iho o te whakanui whai hua e whakamahia ana hei whakanui i te rama tohu. Koinei tētahi o ngā take matua he iti iho te whakanui ine i te uara ingoa.
2.3 Te whanaungatanga tauanga: Ko te teitei ake o te mana tohu tāuru, ko te nui ake o te pēhanga o te hua tuturu (G_actual) ki te whakataurite ki te hua tohu iti (G_small). Ko te nui o te pēhanga i ahu mai i te pēhanga saturation (Δ G_sat) me te hua mai i te kai haruru ASE (Δ G_ASE). Hei tauira, ina 0dBm te mana tāuru, he mea noa kia neke atu i te 3dB te iti iho i te uara ingoa te hua i inehia.
3. Ngā whakaaro mō ngā mahi hangarau:
3.1 Tahua hononga: Kaua te iti o te whakanui tohu e whakamahia tika mō te tatau, engari me whakamahi i tētahi tātai tahua hononga pono ake:
P_out ≈ P_in+G_small-NF-3dB (tawhē haumaru)
I roto i ēnei, ko te NF te tau haruru (uara noa 4-6dB).
3.2 Whakatikatika whakamuri: Mena kāore te mana putanga i inehia e ōrite ki te tahua tātai, ka taea te whakamahi i te tātai hei tatau i te whika haruru pūnaha tuturu (NF) i te whakamuri, kia taea ai te hoahoa hononga me te whakatikatika tika ake.
Whakatau: I te aromatawai me te whakamahiEDFAMō te Whakakaha Whatu, me aro nui ngā kaihangarau ki te kaha o te tohu tāuru, me te mārama hoki ki te āhuatanga o te pēhanga whakanui i raro i ngā āhuatanga tohu teitei. I te wā e hoahoa ana i te hononga, me hangai te tahua ki te kaha tāuru tuturu me ngā tātai hangarau e whakauru ana i te tauwehenga haruru me te tawhē haumaru, kaua e whakawhirinaki noa ki te uara ingoa o te whakanui tohu iti i runga i te pepa whakatakotoranga. I muri i te whiwhinga i te Whakakaha Whatu EDFA, pātai tuatahi he aha te kaha tāuru, kātahi ka whakamahi i te tātai tahua hononga hei tatau i te putanga e tumanakohia ana. Kaua e whakamahi i te whakanui tohu iti mō te tahua mana katoa.
Wā tuku: 27 Paenga-whāwhā 2026