Okokuqala, ulwazi olusisiseko lwemodyuli ye-optical
1.Inkcazo yemodyuli yokubona:
Imodyuli yokukhanya: oko kukuthi, imodyuli yokubona itransceiver.
2.Ulwakhiwo lwemodyuli yokubona:
Imodyuli ye-optical transceiver yenziwe ngesixhobo se-optoelectronic, isiphaluka esisebenzayo kunye ne-optical interface, kunye nesixhobo se-optoelectronic sibandakanya iinxalenye ezimbini: ukuhambisa nokufumana.
Inxalenye yokuhambisa yile: isignali yombane ifaka iqondo elithile lekhowudi iqhutywe yi-chip yangaphakathi yokuqhuba ukuqhuba i-laser semiconductor (LD) okanye i-diode ekhupha ukukhanya (i-LED) ukukhupha isignali yokukhanya emodareyithiweyo 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 yokubona
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:
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 (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);
Izinga losulelo
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.
Umgama wothumelo
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.
Okwesibini, ingcamango esisiseko yeemodyuli ze-optical
1.Udidi lweLaser
I-laser iyona nxalenye ephambili yemodyuli ye-optical injecting current kwi-semiconductor material kwaye ikhupha ukukhanya kwe-laser ngokusebenzisa i-photon oscillations kunye nokuzuza kwi-cavity.Okwangoku, ezona lasers ziqhele ukusetyenziswa yiFP kunye neDFB lasers.Umahluko kukuba izinto ze-semiconductor kunye nesakhiwo secavity sihluke.Ixabiso le-laser ye-DFB libiza kakhulu kune-FP laser.Iimodyuli ze-Optical ezinemigama yokudlulisa ukuya kwi-40KM ngokubanzi zisebenzisa i-laser ye-FP.Iimodyuli ze-Optical ezinemigama yokudlulisa≥I-40KM ngokubanzi isebenzisa iilaser zeDFB.
2.Ukuhanjiswa kwamandla optical kunye nokufumana ubuntununtunu
I-optical power transmitted power ibhekisela kumandla okukhanya ophumayo omthombo wokukhanya ekupheleni kokuhambisa imodyuli ye-optical.Ukufumana ubuntununtunu kubhekiselele kumandla okukhanya afunyenweyo amancinci emodyuli ye-optical kwireyithi ethile kunye nebit error rate.
Iiyunithi zezi parameters zimbini ziyi-dBm (ithetha i-decibel milliwatt, i-logarithm yeyunithi yamandla mw, i-formula yokubala yi-10lg, i-1mw iguqulelwa kwi-0dBm), esetyenziswa kakhulu ukuchaza umgama wothumelo lwemveliso, ubude bamaza ahlukeneyo, izinga lothumelo kunye namandla okuhambisa imodyuli ye-optical kunye nokufumana ubuntununtunu iya kwahluka, okoko nje umgama wothumelo unokuqinisekiswa.
3.Ilahleko kunye nokusasazeka
Ilahleko kukulahlekelwa kwamandla okukhanya ngenxa yokufunxa kunye nokusabalalisa okuphakathi kunye nokuvuza kokukhanya xa ukukhanya kuhanjiswa kwifiber.Le nxalenye yamandla ichithwa ngomlinganiselo othile njengoko umgama wothumelo unyuka. Ukusasazwa ikakhulu kubangelwa yisantya esingalinganiyo samaza ombane ombane ohlukeneyo osasazeko oluphakathi, nto leyo ebangela amacandelo obude obuhlukeneyo bomqondiso wokukhanya ukufikelela ukufumana isiphelo ngamaxesha ahlukeneyo ngenxa yokuqokelelwa komgama wothumelo, okukhokelela ekwandiseni i-pulse kwaye ngaloo ndlela ukungakwazi ukwahlula imiqondiso.ixabiso.Ezi parameters zimbini zichaphazela kakhulu umgama wokuhanjiswa kwemodyuli ye-optical.Kwinkqubo yesicelo sangempela, imodyuli ye-1310nm ye-optical ngokubanzi ibala ukulahleka kwekhonkco kwi-0.35dBm / km, kwaye imodyuli ye-optical ye-1550nm ngokubanzi ibala ukulahleka kwekhonkco kwi-.20dBm / km, kwaye ibala ixabiso lokusabalalisa.Intsonkothe kakhulu, ngokubanzi kuphela ireferensi.
4.Ubomi bemodyuli yokubona
Imigangatho emanyeneyo yamazwe ngamazwe, iiyure ezingama-50,000 zomsebenzi oqhubekayo, iiyure ezingama-50,000 (ezilingana neminyaka emi-5).
Iimodyuli ze-SFP ezibonakalayo zizo zonke ii-interfaces ze-LC.Iimodyuli ze-GBIC ezibonakalayo zizo zonke ii-SC interfaces.Olunye ujongano lubandakanya iFC kunye ne-ST.