Izici zeIsikhulisi se-EDFA
Isimiso sokusebenza sama-fiber amplifiers sifana kakhulu nesama-laser aqinile. Amazinga wamandla afanele, ukumuncwa kanye ne-gain spectra yama-erbium ions (Er ³ ⁺) kuma-quartz optical fibers aboniswe ku-Figure 2. Izakhiwo ezi-amorphous ze-quartz zandisa amazinga wamandla ama-erbium ions abe ama-band, futhi izinguquko eziningi zingasetshenziswa ukupompa ama-erbium ions, kanti ama-wavelength e-pump asebenza kahle kakhulu angama-980 nm kanye no-1480 nm.
Ubude besikhathi obusebenzayo be-EDFA Amplifier buwela ngaphakathi kwebanga elihle kakhulu le-wavelength elingu-1330-1600nm lokuxhumana kwe-fiber optic. I-EDFA Amplifier esebenza ku-C-band (1530-1565nm) enefasitela lokulahlekelwa yi-fiber eliphansi kakhulu isetshenziswe kabanzi. Ukuze kusetshenziswe ngokugcwele izinsiza ze-bandwidth ze-optical fibers, abantu bazimisele futhi ekuthuthukiseni ama-EDFA ku-L-band (1570-1610nm). I-L-band itholakala emsileni we-EDFA gain spectrum, ngakho-ke ama-L-band EDFA kumele asebenzise i-fiber ende namandla aphezulu ephampu, noma asebenzise i-fiber exutshwe kakhulu.
I-EDFA Optical Amplifierine-gain ephezulu (engaphezu kuka-30-50dB) futhi inikeza i-flat gain phezu kwe-wide frequency band (kufika ku-30nm), okwenza ifanelekele ukukhulisa amasignali eziteshini eziningi ze-optical, ikakhulukazi ezinhlelweni ze-dense wavelength division multiplexing (DWDM). Umsindo ophansi (4-8dB), osondela emkhawulweni we-quantum. Uma isetshenziswa ezinhlelweni ze-WDM, i-crosstalk phakathi kweziteshi iyancishiswa futhi ama-amplifier amaningi angasuswa. Njengoba inamandla aphezulu okukhipha ukugcwala (10-20 dBm), ingasetshenziswa njenge-power amplifier ngemuva kwe-transmitter ukwandisa ibanga lokudlulisa noma inani elibekiwe lama-optical nodes ngaphandle kwemigqa yokudlulisela. Amandla epompo adingekayo aphansi (amashumi ama-milliwatts). I-gain ayixhomekile esimweni se-polarization se-fiber, ngakho-ke inokuqina okuhle. Kulula ukuyihlanganisa ne-transmission optical fibers, ngokulahlekelwa okuphansi kokuxhuma (<1dB). Ngaphandle komthombo wepompo, i-EDFAI-Amplifier Yokukhanyayakhiwe yizingxenye ezingasebenzi. Ngakho-ke, uma kuqhathaniswa nama-relay okuvuselela kagesi ayinkimbinkimbi futhi abizayo, izindleko zesistimu zincishisiwe kakhulu futhi ukuthembeka kuyathuthuka.
Ngaphezu kwalokho, izici zokukhulisa zeI-EDFAAma-amplifier awancikile kwisilinganiso se-bit yesistimu kanye nefomethi yedatha, ngakho-ke angakhulisa futhi adlulisele kokubili ulwazi lwedijithali nolwe-analog. Okubi kwe-erbium doped fiber amplifier yilezi: usayizi omkhulu; Isikhathi sokuphila komthombo wephampu asiside; Ayikwazi ukuhlanganiswa namanye amadivayisi, okunciphisa ukusetshenziswa kwei-amplifier yefayibha ehlanganisiwe ye-erbiumekuhlanganisweni kwe-optoelectronic (OEIC). Ngaphezu kwalokho, i-gain bandwidth ye-EDFA Amplifier imboza kuphela ingxenye yefasitela lokulahlekelwa okuphansi kwe-quartz single-mode fiber, okukhawulela inani leziteshi zamaza obubanzi ezingafakwa yi-fiber, okuphinde kube ukushiyeka kwayo.
Isikhathi sokuthunyelwe: Ephreli-28-2026