Umgaqo kunye nokusetyenziswa kweI-amplifier yefayibha efakwe i-erbium kwi-EDFA
Ulwakhiwo olusisiseko lweI-EDFAi-amplifier yefayibha efakwe i-erbium, eyenziwe ikakhulu yi-medium esebenzayo (i-fibre ye-quartz eneemitha ezininzi ubude, ububanzi obuphakathi obuyi-3-5 microns, i-doping concentration (25-1000)x10-6), umthombo wokukhanya kwepompo (990 okanye 1480nm LD), i-optical coupler kunye ne-optical isolator. Ukukhanya kwesignali kunye nokukhanya kwepompo zinokusasazeka kwicala elifanayo (co-pumping), kwicala elichaseneyo (reverse pumping), okanye zombini iindlela (bidirectional pumping) kwi-Erbium fiber. Xa ukukhanya kwesignali kunye nokukhanya kwepompo kufakwa kwi-erbium fiber ngaxeshanye, i-erbium ion iyavuselelwa kwinqanaba lamandla aphezulu (inkqubo yamanqanaba amathathu) phantsi kwesenzo sokukhanya kwepompo, kwaye ngokukhawuleza ibole kwinqanaba elizinzileyo. Xa ibuyela kwimeko yomhlaba phantsi kwesenzo sokukhanya kwesignali yesiganeko, i-photon ehambelana nokukhanya kwesignali iyakhutshwa, ukuze uphawu lwandiswe. I-spectrum yayo ye-amplified spontaneous emission (ASE) ine-bandwidth enkulu (ukuya kuthi ga kwi-20-40nm) kwaye ineencochoyi ezimbini ezihambelana ne-1530nm kunye ne-1550nm ngokulandelanayo.
Iingenelo eziphambili zeIsikhulisi se-EDFAzi-gain ephezulu, i-bandwidth enkulu, amandla aphezulu okukhupha, ukusebenza kakuhle kokupompa, ilahleko ephantsi yokufakelwa, kunye nokungavakalelwa kwiimeko ze-polarization.
Umgaqo wokusebenza we-erbium-doped fiber amplifier
I-amplifier yefayibha efakwe i-Erbium（Isandisi-lizwi se-EDFA Optical） I-Erbium yenziwe kakhulu ngefayibha efakwe i-erbium (malunga ne-10-30m ubude) kunye nomthombo wokukhanya wepompo. Umgaqo osebenzayo kukuba ifayibha efakwe i-erbium ivelisa imitha evuselelweyo phantsi kwesenzo somthombo wokukhanya opompelweyo (ubude be-wavelength 980nm okanye i-1480nm), kwaye ukukhanya okukhanyisiweyo kuyatshintsha ngokutshintsha kwesignali yokukhanya efakiweyo, okufana nokwandisa isignali yokukhanya efakiweyo. Iziphumo zibonisa ukuba inzuzo ye-Erbium-doped fiber amplifier idla ngokuba yi-15-40db, kwaye umgama we-relay unokwandiswa ngaphezulu kwe-100km. Ke, abantu abanakunceda kodwa babuze: kutheni izazinzulu zicinge ngokusebenzisa i-erbium efakwe i-doped kwi-fiber amplifier ukwandisa amandla amaza okukhanya? Siyazi ukuba i-erbium yinto enqabileyo yomhlaba, kwaye izinto ezinqabileyo zomhlaba zineempawu zazo ezikhethekileyo zesakhiwo. Ukusebenzisa izinto ezinqabileyo zomhlaba kwizixhobo ze-optical kuye kwasetyenziswa ixesha elide ukuphucula ukusebenza kwezixhobo ze-optical, ngoko ke oku akuyonto eyenzeka ngengozi. Ukongeza, kutheni ubude bomsinga womthombo wokukhanya wepompo bukhethwa kwi-980nm okanye kwi-1480nm? Enyanisweni, ubude bomsinga womthombo wokukhanya wepompo bunokuba yi-520nm, 650nm, 980nm, kunye ne-1480nm, kodwa indlela yokusebenza iye yabonisa ukuba ubude bomsinga womthombo wokukhanya wepompo we-1480nm buphezulu, bulandelwa bubude bomsinga womthombo wokukhanya wepompo we-980nm.
Ulwakhiwo lwendalo
Isakhiwo esisisiseko se-erbium-doped fiber amplifier (EDFA Optical Amplifier). Kukho i-isolator kwisiphelo sokufaka kunye nesiphelo sokukhupha, injongo kukwenza i-optical signal transmission ibe yindlela enye. I-pump exciter inobude be-980nm okanye i-1480nm kwaye isetyenziselwa ukubonelela ngamandla. Umsebenzi we-coupler kukudibanisa i-input optical signal kunye ne-pump light kwi-erbium-doped fiber, kunye nokudlulisela amandla okukhanya kwepompo kwi-input optical signal ngesenzo se-erbium-doped fiber, ukuze kufezekiswe ukwandiswa kwamandla kwe-input optical signal. Ukuze kufumaneke amandla aphezulu okukhanya kunye ne-low noise index, i-Erbium-doped fiber amplifier esetyenziswa kwizenzo isebenzisa ulwakhiwo lwemithombo emibini okanye ngaphezulu yepompo ene-isolators embindini ukuze zahlulwe. Ukuze kufumaneke i-gain curve ebanzi nethe tyaba, kongezwa i-gain flattening filter.
I-EDFA inamacandelo amahlanu aphambili: i-Erbium-doped fiber (EDF), i-Optical coupler (WDM), i-optical isolator (ISO), i-Optical Filter, kunye ne-Pumping Supply. Imithombo yepompo esetyenziswa rhoqo iquka i-980nm kunye ne-1480nm, kwaye le mithombo yepompo mibini inamandla aphezulu okupompa kwaye isetyenziswa ngakumbi. I-coefficient yengxolo yomthombo wokukhanya wepompo ye-980nm iphantsi; Umthombo wokukhanya wepompo ye-1480nm unamandla aphezulu okupompa kwaye unokufumana amandla amakhulu okukhupha (malunga ne-3dB ephezulu kunomthombo wokukhanya wepompo ye-980nm).
inzuzo
1. Ububanzi bomda obusebenzayo buhambelana nefestile encinci yokunciphisa ubushushu yefayibha yemowudi enye.
2. Ukusebenza kakuhle kokudibanisa. Ngenxa yokuba yi-fiber amplifier, kulula ukuyidibanisa ne-transmission fiber.
3. Ukusebenza kakuhle kokuguqula amandla. Umbindi we-EDF mncinci kunowefayibha yokudlulisa, kwaye ukukhanya kwesiginali kunye nokukhanya kwepompo zidluliselwa ngaxeshanye kwi-EDF, ngoko ke amandla okukhanya agxile kakhulu. Oku kwenza ukusebenzisana phakathi kokukhanya kunye ne-gain medium Er ion kugcwele kakhulu, kudityaniswe nobude obufanelekileyo befayibha efakwe i-erbium, ngoko ke ukusebenza kakuhle kokuguqula amandla okukhanya kuphezulu.
4. Inzuzo ephezulu, isalathisi sengxolo ephantsi, amandla amakhulu okukhupha, incoko ephantsi phakathi kweetshaneli.
5. Iimpawu ze-Stable gain: I-EDFA ayikhathali ngamaqondo obushushu, kwaye i-gain ayinanto ingako enxulumene ne-polarization.
6. Isici senzuzo asixhomekekanga kwisantya sebhithi yenkqubo kunye nefomathi yedatha.
ukusilela
1. Isiphumo esingesomgca: I-EDFA yandisa amandla okukhanya ngokwandisa amandla okukhanya afakwe kwifayibha, kodwa okukhona inkulu kokukhona ingcono. Xa amandla okukhanya enyuswa ukuya kwinqanaba elithile, umphumo ongesomgca wefayibha okhanyayo uya kuveliswa. Ke ngoko, xa kusetyenziswa ii-amplifiers zefayibha optical, kufuneka kuqwalaselwe ixabiso lokulawula amandla okukhanya okukhanya angenayo kwi-single-channel.
2. Uluhlu lwe-gain wavelength luzinzile: uluhlu lwe-working wavelength lwe-C-band EDFA yi-1530nm ~ 1561nm; Uluhlu lwe-working wavelength lwe-L-band EDFA yi-1565nm ~ 1625nm.
3. I-Uneven gain bandwidth: I-gain bandwidth ye-EDFA erbium-doped fiber amplifier ibanzi kakhulu, kodwa i-gain spectrum ye-EDF ngokwayo ayithe tyaba. Isihluzi se-gain flattening kufuneka samkelwe ukuze sithe tyaba i-gain kwinkqubo ye-WDM.
4. Ingxaki yokukhanya okukhawulezayo: Xa indlela yokukhanya iqhelekile, ii-ion ze-erbium ezivuselelwa sisibane sepompo zithwalwa sisibane sesignali, ngaloo ndlela zigqibezela ukwandiswa kwesibane sesignali. Ukuba isibane esingenayo sinqunyulwe, kuba ii-ion ze-erbium eziguquguqukayo ziyaqhubeka nokuqokelelana, xa isibane sesignali sibuyiselwe, amandla aya kugxuma, nto leyo ebangela ukukhanya okukhawulezayo.
5. Isisombululo sokunyuka kwe-optical kukufezekisa umsebenzi wokunciphisa amandla okukhanya ngokuzenzekelayo (APR) okanye umsebenzi wokucima amandla okukhanya ngokuzenzekelayo (APSD) kwi-EDFA, oko kukuthi, i-EDFA inciphisa amandla ngokuzenzekelayo okanye icime amandla ngokuzenzekelayo xa kungekho kukhanya kokufaka, ngaloo ndlela icinezela ukwenzeka kwento yokunyuka.
Imo yesicelo
1. I-booster Amplifier isetyenziselwa ukunyusa amandla emiqondiso emininzi ye-wavelength emva kwe-booster wave, ize emva koko izidlulisele. Ekubeni amandla esignali emva kwe-booster wave edla ngokuba makhulu, i-noise index kunye ne-gain ye-power amplifier aziphezulu kakhulu. Inamandla amakhulu okukhupha.
2. I-Line-amplifier, emva kwe-power Amplifier, isetyenziselwa ukuhlawula ilahleko yokudluliselwa koMgca ngamaxesha athile, ngokubanzi ifuna isalathisi sengxolo esincinci kunye namandla amakhulu okukhanya aphumayo.
3. I-Pre-Amplifier: Ngaphambi kwe-splitter nasemva kwe-line amplifier, isetyenziselwa ukukhulisa isignali kunye nokuphucula uvakalelo lwe-receiver (kwimeko yokuba i-optical signal-to-noise ratio (OSNR) iyahlangabezana neemfuno, amandla amakhulu okufaka anokuthintela ingxolo ye-receiver ngokwayo kwaye aphucule uvakalelo lwe-receiver), kwaye i-noise index incinci kakhulu. Akukho mfuneko inkulu kumandla okukhupha.
Ixesha leposi: Matshi-17-2025