Okokuqala, ulwazi oluyisisekelo lwe-optical module
1.Incazelo yemojuli ye-optical:
Imojula ye-Optical: okungukuthi, imojula ye-optical transceiver.
2.Isakhiwo semojuli ye-optical:
Imodyuli ye-optical transceiver yenziwe ngedivayisi ye-optoelectronic, isifunda esisebenzayo kanye ne-optical interface, futhi idivayisi ye-optoelectronic ihlanganisa izingxenye ezimbili: ukudlulisa nokwamukela.
Ingxenye yokudlulisela ithi: isignali kagesi efaka inani lekhodi ethile icutshungulwa yi-chip yangaphakathi yokushayela ukushayela i-semiconductor laser (LD) noma i-light emitting diode (LED) ukuze ikhiphe isignali yokukhanya eguquliwe yezinga elihambisanayo, kanye ne-optical Isifunda sokulawula okuzenzakalelayo samandla sinikezwa ngaphakathi ngaphakathi.Amandla wesignali ye-optical okukhiphayo ahlala ezinzile.
Ingxenye eyamukelayo ithi: imojula yokufaka isignali ye-optical yezinga elithile lekhodi iguqulwa ibe isignali kagesi nge-photodetecting diode.Ngemuva kwe-preamplifier, isignali kagesi yezinga lekhodi ehambisanayo iyaphuma, futhi isignali yokuphumayo ngokuvamile izinga le-PECL.Ngesikhathi esifanayo, isignali ye-alamu iphuma ngemva kokuba amandla okufaka optical engaphansi kwevelu ethile.
3.Amapharamitha kanye nokubaluleka kwemojuli ye-optical
Amamojula okukhanya anemingcele eminingi ebalulekile ye-optoelectronic technical.Kodwa-ke, kumamojula amabili ashisayo ashintshwayo, i-GBIC ne-SFP, amapharamitha amathathu alandelayo akhathazeka kakhulu lapho kukhethwa:
Ubude begagasi obumaphakathi
Kuma-nanometers (nm), okwamanje kunezinhlobo ezintathu eziyinhloko:
I-850nm (MM, i-multimode, izindleko eziphansi kodwa ibanga elifushane lokudlulisela, ngokuvamile lingu-500M kuphela);I-1310nm (SM, imodi eyodwa, ukulahlekelwa okukhulu ngesikhathi sokudlulisela kodwa ukuhlakazeka okuncane, okuvame ukusetshenziselwa ukudluliselwa ngaphakathi kwe-40KM);
I-1550nm (i-SM, imodi eyodwa, ukulahlekelwa okuphansi ngesikhathi sokudlulisela kodwa ukuhlakazeka okukhulu, ngokuvamile okusetshenziselwa ukudluliswa kwebanga elide ngaphezu kwe-40KM, futhi ingadlulisela ngokuqondile i-120KM ngaphandle kokudluliselwa);
Izinga lokudlulisela
Inani lamabhithi (amabhithi) edatha adluliswa ngesekhondi ngalinye, ngama-bps.
Njengamanje kunezinhlobo ezine ezivame ukusetshenziswa: 155 Mbps, 1.25 Gbps, 2.5 Gbps, 10 Gbps, nokunye okunjalo.Izinga lokudlulisela livamise ukuhambisana nokubuyela emuva.Ngakho-ke, i-155M optical module ibizwa nangokuthi i-FE (100 Mbps) optical module, kanti i-1.25G optical module ibizwa nangokuthi i-GE (Gigabit) optical module.Lena imojula esetshenziswa kakhulu emishinini yokudlulisa amehlo.Ngaphezu kwalokho, izinga layo lokudlulisela ku-fiber storage systems (SAN) yi-2Gbps, 4Gbps kanye ne-8Gbps.
Ibanga lokudlulisela
Isignali yokubona ayidingi ukudluliselwa ebangeni elingadluliswa ngokuqondile, ngamakhilomitha (okubizwa nangokuthi amakhilomitha, km).Amamojula optical ngokuvamile anezincazelo ezilandelayo: i-multimode 550m, imodi eyodwa 15km, 40km, 80km, kanye ne-120km, njalonjalo.
Okwesibili, umqondo oyisisekelo wamamojula optical
1.Isigaba se-Laser
I-laser iyisakhi esimaphakathi kakhulu semojula yokubona ejova okwamanje kumpahla ye-semiconductor futhi ikhiphe ukukhanya kwe-laser ngokusebenzisa ama-photon oscillations kanye nenzuzo emgodini.Njengamanje, amalaser asetshenziswa kakhulu ama-laser e-FP kanye ne-DFB.Umehluko wukuthi impahla ye-semiconductor kanye nesakhiwo somgodi kuhlukile.Intengo ye-laser ye-DFB ibiza kakhulu kune-laser ye-FP.Amamojula optical anamabanga okudlulisela afika ku-40KM ngokuvamile asebenzisa ama-laser e-FP.Amamojula optical anamabanga okudlulisela≥I-40KM ivamise ukusebenzisa amalaser e-DFB.
2.Amandla okukhanya adlulisiwe kanye nokuzwela kokuthola
Amandla okukhanya adlulisiwe abhekisela emandleni okukhanya okukhiphayo omthombo wokukhanya ekugcineni kokudlulisa kwemojuli ye-optical.Ukuzwela okutholayo kubhekisela emandleni okubonwa amancane atholiwe emojula ye-optical ngenani elithile kanye nezinga lephutha lebhithi.
Amayunithi alawa mapharamitha amabili yi-dBm (okusho i-decibel milliwatt, i-logarithm yeyunithi yamandla mw, ifomula yokubala ngu-10lg, u-1mw uguqulelwa ku-0dBm), esetshenziswa kakhulu ukuchaza ibanga lokudlulisela lomkhiqizo, ubude obuhlukahlukene bamaza, izinga lokudlulisela kanye namandla okudlulisa amehlo emojula ye-optical kanye nokuzwela kuzohluka, inqobo nje uma ibanga lokudlulisela lingaqinisekiswa.
3.Ukulahlekelwa nokuhlakazeka
Ukulahlekelwa ukulahlekelwa amandla okukhanya ngenxa yokumuncwa nokuhlakazeka kwendawo ephakathi nendawo kanye nokuvuza kokukhanya lapho ukukhanya kudluliselwa kufiber.Le ngxenye yamandla ihlakazwa ngesilinganiso esithile njengoba ibanga lokudlulisela likhula.Ukuhlakazeka kubangelwa isivinini esingalingani samaza kagesi amaza ahlukene asakazeka endaweni efanayo, okubangela izingxenye ezihlukene zamaza zesignali ye-optical ukufinyelela ukuthola ukuphela ngezikhathi ezihlukene ngenxa yokunqwabelana kwebanga lokudlulisela, okuholela ekwandeni kokushaya kwenhliziyo kanjalo nokungakwazi ukuhlukanisa amasignali.inani.Lawa mapharamitha amabili athinta kakhulu ibanga lokudlulisela lemojula ye-optical.Enqubweni yangempela yohlelo lokusebenza, imojula ye-optical engu-1310nm ngokuvamile ibala ukulahleka kwesixhumanisi kokuthi 0.35dBm/km, futhi imojula yokubona engu-1550nm ngokuvamile ibala ukulahleka kwesixhumanisi kokuthi .20dBm/km, futhi ibala inani lokuhlakazeka.Inkimbinkimbi kakhulu, ngokuvamile kuphela ireferensi.
4.Impilo yemojuli ye-optical
Izindinganiso ezihlangene zamazwe ngamazwe, amahora angu-50,000 omsebenzi oqhubekayo, amahora angu-50,000 (alingana neminyaka engu-5).
Amamojula we-SFP optical wonke ayi-LC interfaces.Amamojula we-GBIC optical ayiwo wonke ama-SC interface.Ezinye izindawo zokuhlangana zihlanganisa i-FC ne-ST.