I-Erbium-Doped Fiber Amplifiers (EDFAs)

I-Erbium-doped fiber amplifiers (EDFAs) zisebenzisa izinto ezinqabileyo zomhlaba ezifana ne-erbium (Er3+) njengendlela yokwandisa.Ifakwe kwi-fiber core ngexesha lenkqubo yokuvelisa.Iqukethe iqhekeza elifutshane lefiber (ngokuqhelekileyo i-10 m okanye kunjalo) eyenziwe ngeglasi apho umlinganiselo omncinci olawulwayo we-erbium wongezwa njenge-dopant ngendlela ye-ion (Er3 +).Ngaloo ndlela, i-silica fiber isebenza njengendawo yokusingatha.Ngama-dopants (i-erbium) kunokuba i-silica fiber emisela i-wavelength yokusebenza kunye nokufumana i-bandwidth.Ii-EDFAs zisebenza ngokubanzi kummandla we-1550 nm wavelength kwaye zinokunika amandla angaphezu kwe-1 Tbps.Ke, zisetyenziswa ngokubanzi kwiinkqubo zeWDM.

Umgaqo wokukhutshwa okuvuselelweyo uyasebenza kwindlela yokwandisa ye-EDFA.Xa i-dopant (i-erbium ion) ikwimeko ephezulu yamandla, i-photon yesiganeko yesignali ye-optical input iya kuyivuselela.Ikhupha amandla ayo kwi-dopant kwaye ibuyele kwimeko ephantsi yamandla ("i-stimulated emission") ezinzileyo.Lo mfanekiso ungezantsi ubonisa ubume obusisiseko be-EDFA.

1.1 Ubume obusisiseko be-EDFA

Ipompo ye-laser diode ngokuqhelekileyo ivelisa umqondiso we-optical we-wavelength (nokuba yi-980 nm okanye i-1480 nm) kumandla aphezulu (~ 10-200 mW).Lo mqondiso udityaniswa nomqondiso wokufakwa kokukhanya kwicandelo le-erbiumdoped le-silica fiber ngokusebenzisa i-WDM coupler.Ii-ion ze-erbium ziyakufunxa la mandla ophawu lwempompo kwaye zixhumele kwimeko yazo yochulumanco.Inxalenye yomqondiso wokukhanya ophumayo icofa kwaye yondliwa emva kwegalelo le-laser yepompo ngokusebenzisa i-optical filter kunye ne-detector.Oku kusebenza njengendlela yokulawula amandla empendulo ukuze kwenziwe ii-EDFAs njengezandisi ezizilawulayo.Xa zonke ii-electron ze-metastable zisetyenzisiwe ke akukho kwandiswa okunye okwenzekayo.Ke ngoko, inkqubo izinza ngokuzenzekelayo ngenxa yokuba amandla okukhanya okuphumayo e-EDFA ahlala ehlala phantse rhoqo kungakhathaliseki ukuguquguquka kwamandla egalelo, ukuba kukho.

1.2 Isicwangciso esilula sokusebenza se-EDFA

Lo mzobo ungasentla ubonisa iskimu esilula esisebenzayo se-EDFA apho isignali yempompo evela kwi-laser yongezwa kwi-input optical signal (kwi-1480 nm okanye i-980 nm) nge-coupler ye-WDM.

Lo mzobo ubonisa iamplifier ye-EDF esisiseko.Ubude besibonakaliso sempompo (ngempompo yamandla malunga ne-50 mW) yi-1480 nm okanye i-980 nm.Enye inxalenye yalo mqondiso wempompo idluliselwa kwi-input optical signal nge-stimulated emission ngaphakathi kobude obufutshane be-Erbium-doped fiber.Inenzuzo eqhelekileyo ye-optical malunga ne-5-15 dB kunye nenani elingaphantsi kwe-10 dB yengxolo.Kumsebenzi we-1550 nm, kunokwenzeka ukufumana i-30-40 dB inzuzo yokubona.

1.3 Ukuphunyezwa ngokoqobo kwe-EDFA

Lo mzobo ungentla ubonisa ukusebenza okulula kwe-EDFA kunye nesakhiwo sayo esisebenzayo xa isetyenziswe kwi-WDM application.

Njengoko kubonisiwe, ibandakanya ezi nxalenye zilandelayo:

• Isihlukanisi kwigalelo.Oku kugcina ingxolo eveliswa yi-EDFA ekusasazeni ukuya kwisiphelo sothumelo.

• A WDM coupler.Idibanisa i-low-power 1550 nm i-optical data data signal kunye ne-high-power pumping optical signal (ukusuka kumthombo wempompo njenge-laser) kwi-980 nm wavelength.

• Icandelo elincinci le-erbium-doped silica fiber.Enyanisweni, oku kusebenza njengendlela esebenzayo ye-EDFA.

• I-isolator kwimveliso.Inceda ukuthintela nayiphi na i-back-reflected optical signal ekungeneni kwi-erbium-doped silica fiber.

Isiginali yesiphumo sokugqibela sisignali yempompo ye-1550 nm yewavelength kunye nentsalela ye-980 nm yesiginali yempompo yamaza.

Iindidi ze-Erbium-Doped Fiber Amplifiers (EDFAs)

Kukho iindidi ezimbini zezakhiwo ze-Erbium-Doped Fiber Amplifiers (EDFAs):

• I-EDFA kunye nempompo yokusasaza ngokubambisana

• I-EDFA enempompo yokusabalalisa i-counter-propagating

Lo mzobo ungezantsi ubonisa impompo echasene nokusasazwa kwempompo kunye nolungiselelo lwempompo ye-bidirectional engasetyenziswa kwizakhiwo ze-EDFA.

Amalungiselelo epompo ahlukeneyo

Ipompo yokusasaza ngokubambisana i-EDFA ibonakalisa amandla asezantsi aphumayo kunye nengxolo ephantsi;ngelixa impompo yokusasaza i-EDFA ibonelela ngamandla okukhanya aphezulu kodwa ivelisa ingxolo enkulu kakhulu.Kwi-EDFA yorhwebo eqhelekileyo, ipompo ye-bi-directional kunye ne-propagating co-propagating kunye ne-counter-propagating pumping isetyenzisiweyo ekhokelela ekuzuzeni okufanayo okubonakalayo.

Ukusetyenziswa kwe-EDFA njenge-booster, in-line, kunye ne-pre-amplifier

Kwisicelo esithatha ixesha elide sekhonkco lonxibelelwano lwefiber optical, ii-EDFAs zinokusetyenziswa njenge-booster amplifier ekuphumeni kwe-transmitter optical, i-in-line yeamplifier yokukhanya kunye ne-fiber optical kunye ne-pre-amplifier ngaphambi nje kokuba umamkeli, njengoko kubonisiwe kulo mfanekiso ungasentla.

Kunokuqatshelwa ukuba i-EDFAs ekwi-line ibekwe kumgama we-20-100 km ngaphandle ngokuxhomekeke kwilahleko yefiber.Isiginali yegalelo le-Optical ikwi-1.55 μm wavelength, ngelixa iipompo lasers zisebenza kwi-1.48 μm okanye 980 nm ubude bobude.Ubude obuqhelekileyo be-Erbium-doped fiber yi-10-50 m.

I-Amplification Mechanism kwii-EDFAs

Njengoko bekutshiwo ngaphambili, indlela yokwandisa kwi-EDFA isekwe kukhuko oluvuselelweyo olufana nolwe-laser.Amandla aphezulu avela kumqondiso wempompo ye-optical (eveliswa yenye i-laser) ivuyisa i-ion dopant erbium (Er3 +) kwifiber ye-silica kwindawo yamandla aphezulu.Isignali yedatha ye-optical input ivuselela inguqu ye-ion ye-Erbium echulumancisayo ukuya kwimeko yamandla ephantsi kwaye iphumela kwimitha yeefotoni ezinamandla afanayo, oko kukuthi, ubude obufanayo kunye nophawu lwe-optical input.

Umzobo wenqanaba lamandla: Ii-ion ze-Erbium zasimahla zibonisa amanqanaba ahlukeneyo ebhendi yamandla.Xa ii-ion ze-Erbium zifakwe kwifayibha ye-silica, inqanaba ngalinye lamandla azo liyahlukana libe ngamanqanaba asondeleleneyo asondeleleneyo ukuze enze ibhendi yamandla.

1.4 Indlela yokwandisa kwi-EDFA

Ukufumana ukuguqulwa kwabemi, ii-ion ze-Er3 + zimpontshwa kwinqanaba eliphakathi 2. Ngendlela engathanga ngqo (i-980-nm yokumpompa), ii-ion ze-Er3 + zihamba ngokuqhubekayo ukusuka kwinqanaba loku-1 ukuya kwinqanaba lesi-3. apho bawela khona kwinqanaba le-1, bekhupha izibonakaliso ze-optical kwi-wavelength efunwayo ye-1500-1600 nm.Oku kwaziwa njenge-3-level amplification mechanism.

Ukufumana ezinye iimveliso ze-Erbium-doped, nceda ujonge kwiwebhusayithi yethu.

https://www.erbiumtechnology.com/erbium-laser-glasseye-safe-laser-glass/

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