Okokuqala, ulwazi oluyisisekelo lwe-optical module
1.Incazelo:
Imojula ye-Optical: okungukuthi, imojula ye-optical transceiver.
2.Isakhiwo:
Imodyuli ye-optical transceiver yenziwe ngedivayisi ye-optoelectronic, isifunda esisebenzayo kanye ne-optical interface, futhi idivayisi ye-optoelectronic ihlanganisa izingxenye ezimbili: ukudlulisa nokwamukela.
Ingxenye yokudlulisa 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:
(1) 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 (SM, imodi eyodwa, ukulahlekelwa okuphansi ngesikhathi sokudlulisela kodwa ukuhlakazeka okukhulu, okuvame ukusetshenziselwa ukudluliswa kwebanga elide ngaphezu kwe-40KM, futhi ingadlulisela ngokuqondile i-120KM ngaphandle kokudluliselwa);
(2) 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.
(3) 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.