Makhalidwe a EDFA Amplifier

Makhalidwe aChokulitsa cha EDFA
Mfundo yogwirira ntchito ya ma fiber amplifiers ndi yofanana kwambiri ndi ya ma solid-state lasers. Ma energy levels, ma absorption ndi gain spectra a erbium ions (Er ³ ⁺) mu quartz optical fibers akuwonetsedwa mu Chithunzi 2. Ma amorphous properties a quartz amakulitsa mphamvu ya erbium ions kukhala ma band, ndipo kusintha kwakukulu kungagwiritsidwe ntchito kupompa erbium ions, ndipo ma wavelengths ogwira mtima kwambiri a pampu ndi 980 nm ndi 1480 nm.
Kutalika kwa mphamvu ya EDFA Amplifier kuli mkati mwa kutalika kwa mphamvu ya 1330-1600nm polumikizirana ndi fiber optic. EDFA Amplifier yomwe imagwira ntchito mu C-band (1530-1565nm) yokhala ndi zenera lotsika kwambiri la fiber loss yagwiritsidwa ntchito kwambiri. Kuti agwiritse ntchito bwino mphamvu ya bandwidth ya ulusi wa optical, anthu amadziperekanso kupanga ma EDFA mu L-band (1570-1610nm). L-band ili kumapeto kwa EDFA gain spectrum, kotero ma L-band EDFA ayenera kugwiritsa ntchito ulusi wautali komanso mphamvu yayikulu ya pampu, kapena kugwiritsa ntchito ulusi wolemera kwambiri.
Chokulitsa cha EDFA OpticalIli ndi phindu lalikulu (loposa 30-50dB) ndipo imapereka phindu lathyathyathya pamwamba pa gulu lalikulu la ma frequency (mpaka 30nm), zomwe zimapangitsa kuti ikhale yoyenera kukulitsa ma signaling mu njira zingapo za optical, makamaka mu makina a dense wavelength division multiplexing (DWDM). Phokoso lochepa (4-8dB), lomwe limayandikira malire a quantum. Ikagwiritsidwa ntchito ku machitidwe a WDM, kulumikizana pakati pa njira kumachepetsedwa ndipo ma amplifiers angapo amatha kusunthidwa. Pokhala ndi mphamvu yayikulu yotulutsa mphamvu (10-20 dBm), ingagwiritsidwe ntchito ngati amplifier yamphamvu pambuyo pa transmitter kuti iwonjezere mtunda wotumizira kapena kuchuluka kwa ma node optical opanda mizere yolumikizirana. Mphamvu yofunikira ya pampu ndi yotsika (makumi a milliwatts). Kuchulukako sikudalira momwe ulusi umakhalira, kotero imakhala yokhazikika bwino. Yosavuta kuphatikiza ndi ulusi wa optical wotumizira, yokhala ndi kutayika kochepa kwa coupling (<1dB). Kupatula gwero la pampu, EDFAChokulitsa Chowunikiraimapangidwa ndi zinthu zopanda ntchito. Chifukwa chake, poyerekeza ndi ma relay obwezeretsanso amagetsi ovuta komanso okwera mtengo, mtengo wa dongosolo umachepetsedwa kwambiri ndipo kudalirika kumawonjezeka.
Kuphatikiza apo, makhalidwe a kukulitsa kwaEDFAAmplifier sizidalira kuchuluka kwa bit system ndi mtundu wa data, kotero imatha kukulitsa ndikutumiza zambiri za digito komanso za analog. Zoyipa za erbium doped fiber amplifier ndi izi: kukula kwakukulu; Nthawi yogwira ntchito ya gwero la pampu si yayitali; Silingathe kuphatikizidwa ndi zida zina, zomwe zimalepheretsa kugwiritsa ntchitochowonjezera cha ulusi chopangidwa ndi erbiummu optoelectronic integration (OEIC). Kuphatikiza apo, bandwidth ya gain ya EDFA Amplifier imangophimba gawo la zenera lotsika la quartz single-mode fiber, zomwe zimachepetsa kuchuluka kwa njira za wavelength zomwe ulusiwo ungathe kupirira, zomwenso ndi vuto lake.