Ka'ida da aikace-aikace naEDFA erbium-doped fiber amplifier
Ainihin tsarin naEDFAerbium-doped fiber amplifier, wanda akasari ya ƙunshi matsakaici mai aiki (yawan mita doped ma'adini fiber, core diamita 3-5 microns, doping maida hankali (25-1000) x10-6), famfo haske Madogararsa (990 ko 1480nm LD), Tantancewar coupler da Tantancewar warewa. Hasken sigina da hasken famfo na iya yaɗuwa ta hanya ɗaya (fasa-hujja), kishiyar hanya (juyawa baya), ko duka kwatance (famfo bidirectional) a cikin fiber Erbium. Lokacin da aka shigar da hasken sigina da hasken famfo a cikin fiber erbium a lokaci guda, erbium ion yana jin daɗi zuwa matakin makamashi mai girma (tsarin matakai uku) a ƙarƙashin aikin hasken famfo, kuma nan da nan ya lalace zuwa matakin metastable. Lokacin da ya koma ƙasa a ƙarƙashin aikin hasken siginar abin da ya faru, ana fitar da photon daidai da hasken siginar, don ƙara siginar. Bakansa mai haɓakawa ba tare da bata lokaci ba (ASE) yana da babban bandwidth (har zuwa 20-40nm) kuma yana da kololuwa biyu daidai da 1530nm da 1550nm bi da bi.
Babban abũbuwan amfãni dagaEDFA amplifierbabban riba, babban bandwidth, babban ƙarfin fitarwa, babban aikin famfo, ƙarancin sakawa, da rashin jin daɗi ga jihohin polarization.
Ka'idar aiki na erbium-doped fiber amplifier
erbium-doped fiber amplifier (EDFA Optical Amplifier） galibi ya ƙunshi fiber na erbium-doped (kimanin tsayin 10-30m) da tushen hasken famfo. Ka'idar aiki ita ce fiber na erbium-doped yana haifar da raɗaɗi mai motsa jiki a ƙarƙashin aikin tushen hasken da aka yi famfo (tsawon tsayin 980nm ko 1480nm), kuma hasken da ke haskakawa yana canzawa tare da canjin siginar hasken shigarwa, wanda yayi daidai da haɓaka siginar hasken shigarwa. Sakamakon ya nuna cewa ribar da ake samu na fiber amplifier na Erbium shine yawanci 15-40db, kuma ana iya ƙara nisan gudun ba da sanda fiye da 100km. Don haka, mutane ba za su iya taimakawa ba sai dai tambaya: me yasa masana kimiyya suka yi tunanin amfani da doped erbium a cikin amplifier fiber don ƙara ƙarfin raƙuman haske? Mun san cewa erbium wani sinadari ne na duniya da ba kasafai ba, kuma abubuwan da ba kasafai ake samun su ba suna da halayensu na musamman. An dade ana amfani da abubuwan da ba kasafai ake yin abubuwa na duniya ba a cikin na'urorin gani don inganta aikin na'urorin gani, don haka wannan ba lamari bane na bazata. Bugu da kari, me yasa aka zaɓi tsawon madaidaicin tushen hasken famfo a 980nm ko 1480nm? A gaskiya ma, tsawon tsayin tushen hasken famfo na iya zama 520nm, 650nm, 980nm, da 1480nm, amma aikin ya tabbatar da cewa tsawon ƙarfin 1480nm famfo hasken hasken wutar lantarki shine mafi girma, sannan kuma tsayin hasken famfo na 980nm.
Tsarin jiki
Tsarin asali na erbium-doped fiber amplifier (EDFA Optical Amplifier). Akwai mai keɓancewa a ƙarshen shigarwar da ƙarshen fitarwa, manufar ita ce sanya siginar gani ta hanya ɗaya. The famfo exciter yana da zangon 980nm ko 1480nm kuma ana amfani dashi don samar da makamashi. Ayyukan ma'aurata shine haɗa siginar shigar da siginar shigarwa da hasken famfo cikin fiber na erbium-doped, da kuma canja wurin makamashin hasken famfo zuwa siginar shigar da siginar ta hanyar aikin fiber na erbium-doped, don gane ƙarfin haɓakar siginar shigarwar. Domin samun mafi girman ƙarfin gani na gani da ƙaramar amo, firikwensin fiber na Erbium-doped da ake amfani da shi a aikace yana ɗaukar tsarin tushen famfo biyu ko fiye tare da masu keɓewa a tsakiya don ware juna. Domin samun fa'ida da lallausan lanƙwan riba, ana ƙara tacewa mai fa'ida.
EDFA ta ƙunshi manyan sassa biyar: Erbium-doped fiber (EDF), Optical coupler (WDM), mai keɓewar gani (ISO), Filter Optical, da Samar da famfo. Tushen famfo da aka fi amfani da su sun haɗa da 980nm da 1480nm, kuma waɗannan hanyoyin famfo guda biyu suna da ingantaccen aikin famfo kuma ana amfani da su sosai. 980nm famfo haske tushen amo coefficient ne m; Madogarar hasken famfo na 1480nm yana da ingantaccen aikin famfo kuma yana iya samun ƙarfin fitarwa mai girma (kimanin 3dB sama da tushen hasken famfo na 980nm).
amfani
1. Tsawon tsayin aiki ya yi daidai da ƙaramin taga attenuation na fiber-mode guda ɗaya.
2. Babban haɗin kai yadda ya dace. Domin yana da ƙaramar fiber, yana da sauƙi don haɗawa da fiber watsawa.
3. Babban ƙarfin jujjuyawar makamashi. Jigon EDF ya fi ƙanƙanta fiye da na fiber watsawa, kuma ana watsa hasken sigina da hasken famfo lokaci guda a cikin EDF, don haka ƙarfin gani yana da hankali sosai. Wannan yana sa hulɗar tsakanin haske da samun matsakaicin Er ion cikakke sosai, tare da tsayin da ya dace na erbium-doped fiber, don haka ƙarfin juyi na makamashin haske yana da girma.
4. Babban riba, ƙananan ƙididdiga na amo, babban ƙarfin fitarwa, ƙananan maganganu tsakanin tashoshi.
5. Stable riba halaye: EDFA ba shi da kula da zafin jiki, kuma samun yana da kadan dangantaka da polarization.
6. The riba alama ne mai zaman kanta daga tsarin bit kudi da kuma bayanai format.
gazawa
1. Tasiri mara kyau: EDFA yana haɓaka ikon gani ta hanyar ƙara ƙarfin gani da aka allura a cikin fiber, amma mafi girma shine mafi kyau. Lokacin da aka ƙara ƙarfin gani zuwa wani ɗan lokaci, za a samar da tasirin da ba daidai ba na fiber na gani. Don haka, lokacin amfani da amplifiers na fiber na gani, ya kamata a ba da hankali ga ƙimar sarrafa tashar fiber na gani mai shigowa tashoshi ɗaya.
2. An daidaita kewayon tsayin tsayin riba: kewayon tsayin aiki na C-band EDFA shine 1530nm ~ 1561nm; Matsakaicin tsayin aiki na L-band EDFA shine 1565nm ~ 1625nm.
3. Rashin daidaituwa na bandwidth: Riba bandwidth na EDFA erbium-doped fiber amplifier yana da faɗi sosai, amma fa'idar riba ta EDF kanta ba ta faɗi ba. Dole ne a karɓi tacewar riba don daidaita riba a tsarin WDM.
4. Matsalar hawan haske: Lokacin da hanyar haske ta kasance ta al'ada, erbium ions masu farin ciki da hasken famfo suna dauke da hasken sigina, don haka yana kammala haɓaka hasken siginar. Idan hasken shigarwa ya lalace, saboda ions erbium metastable suna ci gaba da tarawa, da zarar an dawo da shigar da hasken siginar, makamashi zai yi tsalle, yana haifar da haɓakar haske.
5. Maganin hauhawar wutar lantarki shine gane aikin rage wutar lantarki ta atomatik (APR) ko kuma kashe wutar lantarki ta atomatik (APSD) a cikin EDFA, wato, EDFA ta atomatik yana rage wutar lantarki ta atomatik ko kuma ta kashe wutar ta atomatik lokacin da babu hasken shigarwa, ta haka ne ya hana faruwar lamarin.
Yanayin aikace-aikace
1. Ana amfani da Amplifier mai ƙara ƙarfi don haɓaka ƙarfin sigina masu tsayi da yawa bayan igiyar ƙara, sannan watsa su. Tunda ƙarfin siginar bayan igiyar ƙarar gabaɗaya babba ce, fihirisar amo da ribar ƙarar wuta ba su da girma sosai. Yana da babban ƙarfin fitarwa.
2. Layin amplifier, bayan ƙarfin Amplifier, ana amfani dashi lokaci-lokaci don rama asarar watsa layin lokaci-lokaci, gabaɗaya yana buƙatar ƙaramin ƙaramin ƙara da babban ƙarfin gani.
3. Pre-Amplifier: Kafin mai rarrabawa da kuma bayan amplifier na layi, ana amfani da shi don haɓaka siginar da kuma inganta halayen mai karɓa (idan yanayin siginar siginar-zuwa-amo (OSNR) ya dace da buƙatun, ƙarfin shigar da ya fi girma zai iya dakatar da sautin mai karɓa da kansa kuma ya inganta jin daɗin karɓa), kuma ƙaramar sauti yana da girma sosai. Babu babban buƙatu akan ikon fitarwa.
Lokacin aikawa: Maris 17-2025