Eerbium-doped fiber amplifiers (EDFAs) waxay isticmaalaan walxaha naadirka ah ee dhulka sida erbium (Er3+) oo ah dhexdhexaadiye xoojin ah.Waxaa lagu shubaa xudunta fiberka inta lagu jiro habka wax soo saarka.Waxay ka kooban tahay qayb gaaban oo fiber ah (sida caadiga ah 10 m ama wax ka badan) oo ka samaysan quraarad taas oo qadar yar oo la xakameeyey oo erbium ah lagu daray dopant oo ah qaabka ion (Er3+).Sidaa darteed, fiber-ka silica wuxuu u dhaqmaa sidii dhexdhexaad ah martida loo yahay.Waa dopants (erbium) halkii ay ka ahaan lahayd fiber silica taas oo go'aamisa hirarka dhererka iyo faa'iidada faa'iidada.EDFAs guud ahaan waxay ka shaqeeyaan gobolka dhererka mawjada 1550 nm waxayna bixin karaan awood ka badan 1 Tbps.Markaa, si weyn ayaa loogu isticmaalaa nidaamyada WDM.
Mabda'a qiiqa la kiciyey ayaa lagu dabaqi karaa habka kordhinta ee EDFA.Marka dopant (an erbium ion) uu ku jiro xaalad tamar sare leh, sawir-qaade shil ah oo calaamadda indhaha ah ayaa kicin doonta.Waxa ay ku sii daysaa qayb ka mid ah tamarteeda dopant-ka oo ay ku soo noqoto xaalad tamareed hoose ("kicinta hawada") oo aad u deggan.Jaantuska hoose waxa uu tusinayaa qaabka aasaasiga ah ee EDFA.
1.1 Qaab dhismeedka aasaasiga ah ee EDFA
Diode leysarka bamka ayaa caadiyan soo saara ishaarada indhaha ee hirarka dhererka (980 nm ama 1480 nm) oo leh awood sare (~ 10-200 mW).Digniintu waxa ay la socotaa calaamada gelinta iftiinka ee qaybta erbiumdoped ee fiber silica iyada oo loo marayo lammaane WDM.Iions erbium waxay nuugi doonaan tamarta calaamada bamka waxayna u boodaan xaaladdooda farxadeed.Qayb ka mid ah calaamada iftiinka wax soo saarka ayaa la taabtay oo dib loogu celinayaa gelitaanka laser-ka bamka iyada oo loo marayo shaandhada indhaha iyo qalabka wax sheegta.Tani waxay u adeegtaa habka xakamaynta awoodda jawaab-celinta si EDFA-yada looga dhigo cod-weyneyaal is-xakameeya.Marka dhammaan electrons-ka metastable la isticmaalo markaas wax kordhin dheeraad ah ma imanayo.Sidaa darteed, nidaamku si toos ah ayuu u xasilayaa sababtoo ah soo-saarka awoodda indhaha ee EDFA ayaa weli ah mid joogto ah iyada oo aan loo eegin isbeddelka awoodda wax-gelinta, haddii ay jirto.
1.2 Nidaam hawleed la fududeeyay ee EDFA
Jaantuska kore waxa uu tusinayaa qaab hawleed la fududeeyey ee EDFA kaas oo calaamada bamka leysarka lagu daro calaamadda indhaha (1480 nm ama 980 nm) iyada oo loo marayo isku-xidhaha WDM.
Jaantuskani wuxuu muujinayaa cod-weyneeye EDF oo aasaasi ah.Dhererka hirarka calaamada bamka (oo leh awoodda bamka qiyaastii 50mW) waa 1480 nm ama 980 nm.Qayb ka mid ah calaamada bamka waxaa lagu wareejiyaa ishaariyaha indhaha iyadoo la kicinayo sii daayo muddo gaaban oo ah fiber-ka Erbium-doped ah.Waxay leedahay faa'iidada indhaha ee caadiga ah oo ku saabsan 5-15 dB iyo in ka yar 10 dB tirada sanqadh.Hawlgalka 1550 nm, waxaa suurtagal ah in la helo 30-40 dB faa'iido muuqaal ah.
1.3 Xaqiijinta dhabta ah ee EDFA
Jaantuska sare waxa uu muujinayaa hawl fududaynta EDFA oo leh qaabdhismeedkeeda la taaban karo marka loo isticmaalo codsiga WDM.
Sida muuqata, waxa ku jira qaybaha waaweyn ee soo socda:
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Go'doomiye meel galinta.Tani waxay ka ilaalinaysaa qaylada ay dhaliso EDFA inay ku faafto xagga dhamaadka gudbinta.
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Lammaanaha WDM.Waxay isku daraysaa isha hoose ee xogta gelinta indhaha ee 1550nm oo leh awood sare oo bamgarayn indhaha ah (laga soo bilaabo isha bamka sida laser) ee dhererka 980 nm.
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Qayb yar oo ah erbium-doped silica fiber.Dhab ahaantii, tani waxay u adeegtaa sida dhexdhexaadinta firfircoon ee EDFA.
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Go'doomiye at wax soo saarka.Waxay ka caawisaa inay ka hortagto calaamad kasta oo dib-u-eegis ah oo soo gasha fiber silica erbium-doped.
Calaamadda wax-soo-saarka kama dambaysta ahi waa 1550nm mawjadda xogta isha ee dhererka mawjada leh oo hadhaaga 980 nm calaamada mawjada dhererka.
Noocyada Erbium-Doped Fiber Amplifiers (EDFAs)
Waxaa jira laba nooc oo qaab-dhismeedka Erbium-Doped Fiber Amplifiers (EDFAs):
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EDFA oo leh bamka faafinta wadashaqaynta
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EDFA oo leh bamka ka hortagga faafinta
Jaantuska hoose waxa uu tusinayaa bamka ka-hortagga faafinta iyo habaynta bamka laba jiho ee loo isticmaali karo qaab-dhismeedka EDFA.
Nidaamyada bamka ee kala duwan
Bamka wada faafinta ee EDFA wuxuu leeyahay awood wax soo saar hoose oo sanqadh hoose leh;halka bamka ka-hortagga faafinta EDFA uu bixiyo awood sare oo wax-soo-saarka laakiin waxay soo saartaa buuq weyn.EDFA-ganacsiyeedka caadiga ah, bamka laba jiho leh oo isku mar wada-faafinaya iyo bamgareynta ka-hortagga ayaa la isticmaalaa taas oo keenta faa'iido muuqaal la mid ah.
Codsiga EDFA sidii xoojiye, khadka-dhex-dhexaadka ah, iyo cod-weyneeye ka hor
Codsi dheer oo ah isku xirka isgaarsiinta fiber indhaha, EDFA-yada waxaa loo isticmaali karaa sidii cod-weyneeye kor u qaada wax soo saarka gudbiyaha indhaha, cod-weyneeye gudaha-line ah oo ay weheliso fiber indhaha iyo sidoo kale cod-weyneeye ka hor wax yar ka hor qaataha, sida ku cad shaxanka sare.
Waxaa laga yaabaa in la xuso in EDFA-yada-line la dhigo masaafo 20-100 km ah iyada oo ku xidhan luminta fiber-ka.Calaamadda gelinta indhaha waa dhererka mawjadda 1.55 μm, halka laysarka bamka ay ku shaqeeyaan 1.48 μm ama 980 nm dhererka hirarka.Dhererka caadiga ah ee erbium-doped fiber waa 10-50 m.
Farsamaynta Kordhinta ee EDFA-yada
Sidii hore loo sheegay, habka kor-u-qaadista ee EDFA waxay ku salaysan tahay qiiqa la kiciyey ee la midka ah kan laysarka.Tamar sare oo ka timaadda calaamada bamka indhaha (oo ay soo saarto laser kale) ayaa ka farxisa dopant erbium ions (Er3+) ee fiber silica ee gobolka tamarta sare.Calaamadaha xogta indhaha ee wax-soo-gelinta ahi waxa ay kicisaa u-beddelka ion-yada Erbium ee xiisaha leh ee u gudbaya tamarta hoose waxana ay keentaa shucaaca photon-yada oo leh tamar isku mid ah, ie, hirar la mid ah tan calaamadda indhaha ee gelinta.
Jaantuska heerka tamarta: ion Erbium lacag la'aana waxay soo bandhigaan heerar kala duwan oo ah qaybta tamarta.Marka ion Erbium lagu daro fibre silica, mid kasta oo ka mid ah heerarkooda tamar waxay u kala qaybsan yihiin tiro heerar ah oo aad isugu dhow si ay u sameeyaan koox tamar ah.
1.4 Farsamaynta EDFA
Si loo gaaro roganta dadweynaha, Er3+ ions waxaa lagu shubaa heerka dhexe 2. Habka aan tooska ahayn (980-nm pumping), ion Er3+ ayaa si joogto ah looga guuraa heerka 1 ilaa heerka 3. Waxaa ku xiga suus aan shucaac ahayn ilaa heerka 2, laga bilaabo halkaas oo ay ku dhacaan heerka 1, oo iftiiminaya calaamadaha indhaha ee mawjada dhererka la rabo ee 1500-1600 nm.Tan waxaa loo yaqaan habka 3-heer-weyneynta.
Alaabooyin badan oo Erbium-doped ah, fadlan eeg shabakadayada.
https://www.erbiumtechnology.com/erbium-laser-glasseye-safe-laser-glass/
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Wakhtiga cusboonaysiinta: Jul-05-2022
