Okokuqala, ulwazi olusisiseko lwemodyuli ye-optical
1.Ingcaciso:
Imodyuli yokukhanya: oko kukuthi, imodyuli yokubona itransceiver.
2.Ulwakhiwo:
Imodyuli ye-optical transceiver yenziwe ngesixhobo se-optoelectronic, isiphaluka esisebenzayo kunye ne-optical interface, kunye nesixhobo se-optoelectronic sibandakanya iinxalenye ezimbini: ukuhambisa kunye nokufumana.
Inxalenye yokuhambisa yile: isibonakaliso sombane sokufaka iqondo elithile lekhowudi iqhutywe yi-chip yangaphakathi yokuqhuba ukuqhuba i-laser semiconductor (LD) okanye i-diode ekhupha ukukhanya (i-LED) ukukhupha isignali yokukhanya emodulated yezinga elihambelanayo, kunye ne-optical optical. amandla wesiphaluka ulawulo oluzenzekelayo lunikezelwa ngaphakathi kuyo. Amandla ophawu lwemveliso ye-optical ahlala ezinzileyo.
Inxalenye efumanayo yile: imodyuli ye-optical signal input yezinga elithile lekhowudi liguqulwa libe ngumqondiso wombane nge-photodetecting diode. Emva kwe-preamplifier, isignali yombane yezinga lekhowudi ehambelanayo iphuma, kwaye isignali yokuphuma ngokubanzi kwinqanaba le-PECL. Ngexesha elifanayo, isignali ye-alamu iphuma emva kokuba amandla optical input angaphantsi kwexabiso elithile.
3.iiparamitha kunye nokubaluleka kwemodyuli ye-optical
Iimodyuli ze-Optical zineeparamitha zobugcisa ezininzi ezibalulekileyo ze-optoelectronic. Nangona kunjalo, kwiimodyuli ezimbini ezishushu eziguqukayo, i-GBIC kunye ne-SFP, ezi parameters zintathu zilandelayo zixhalabele kakhulu xa ukhetha:
(1) Ubude obuphakathi
Kwiinanometers (nm), kukho iindidi ezintathu ngoku:
I-850nm (MM, i-multimode, ixabiso eliphantsi kodwa umgama omfutshane wokuhambisa, ngokubanzi kuphela i-500M); I-1310nm (i-SM, imodi enye, ilahleko enkulu ngexesha lokudluliselwa kodwa ukusabalalisa okuncinci, ngokuqhelekileyo kusetyenziselwa ukuhanjiswa ngaphakathi kwe-40KM);
I-1550nm (i-SM, imodi enye, ilahleko ephantsi ngexesha lokudluliselwa kodwa ukusabalalisa okukhulu, ngokuqhelekileyo kusetyenziselwa ukuhanjiswa kwexesha elide ngaphezu kwe-40KM, kwaye inokuhambisa ngokuthe ngqo i-120KM ngaphandle kokubuyisela);
(2) Izinga lokudluliselwa
Inani lamasuntswana (amasuntswana) edatha agqithiselwe ngesekhondi, kwi-bps.
Okwangoku kukho iindidi ezine ezisetyenziswa ngokuqhelekileyo: 155 Mbps, 1.25 Gbps, 2.5 Gbps, 10 Gbps, kunye nokunye okunjalo. Izinga losulelo ngokuqhelekileyo luyahambelana nomva. Ngoko ke, imodyuli ye-155M ye-optical module ikwabizwa ngokuba yi-FE (100 Mbps) imodyuli ye-optical, kwaye imodyuli ye-optical ye-1.25G ikwabizwa ngokuba yi-GE (Gigabit) imodyuli ye-optical.
Le yeyona modyuli isetyenziswa kakhulu kwizixhobo zothumelo lokukhanya. Ukongezelela, izinga lokudluliselwa kwayo kwiinkqubo zokugcina i-fiber (SAN) yi-2Gbps, i-4Gbps kunye ne-8Gbps.
(3) Umgama wokudluliselwa
Umqondiso wokukhanya akufuneki udluliselwe kumgama onokugqithiselwa ngokuthe ngqo, ngeekhilomitha (ekwabizwa ngokuba ziikhilomitha, iikhilomitha). Iimodyuli ze-Optical ngokubanzi zineenkcukacha ezilandelayo: i-multimode 550m, i-mode eyodwa ye-15km, i-40km, i-80km, kunye ne-120km, njalo njalo.