Okokuqala, sidinga ukuqonda amapharamitha ahlukahlukene weamamojula optical, okuyizinhlobo ezintathu eziyinhloko (i-wavelength emaphakathi, ibanga lokudlulisela, izinga lokudlulisela), kanye nomehluko omkhulu phakathi kwamamojula optical nawo abonakala kulawa maphuzu.

1.Ubude begagasi obumaphakathi

Iyunithi ye-wavelength emaphakathi yi-nanometer (nm), okwamanje kunezinhlobo ezintathu eziyinhloko:

1) 850nm (MM,imodi eminingi, izindleko eziphansi kodwa ibanga elifushane lokudlulisela, ngokuvamile ukudluliselwa okungu-500m kuphela);

2) I-1310nm (SM, imodi eyodwa, ukulahlekelwa okukhulu kodwa ukuhlakazeka okuncane ngesikhathi sokudlulisa, ngokuvamile kusetshenziselwa ukudluliselwa ngaphakathi kwe-40km);

3) 1550nm (SM, imodi eyodwa, ukulahlekelwa okuphansi kodwa ukuhlakazeka okukhulu ngesikhathi sokudlulisela, ngokuvamile kusetshenziselwa ukudluliselwa kwebanga elide ngaphezu kuka-40km, futhi okude kakhulu kungadluliselwa ngokuqondile ngaphandle kokudluliselwa kwe-120km).

2. Ibanga lokudlulisela

Ibanga lokudlulisela libhekisela ebangeni lapho amasignali abonakalayo angadluliselwa ngokuqondile ngaphandle kokukhulisa ukudluliselwa. Iyunithi ingamakhilomitha (ebizwa nangokuthi amakhilomitha, km). Amamojula okubona ngokuvamile anezincazelo ezilandelayo: imodi eminingi engu-550m, imodi eyodwa 15km, 40km, 80km no-120km, njll. Linda.

3.Izinga lokudlulisela

Izinga lokudlulisela libhekisela enanini lamabhithi (amabhithi) edatha adluliswa ngomzuzwana, ngama-bps. Izinga lokudlulisela liphansi njenge-100M futhi liphezulu njenge-100Gbps. Kunezilinganiso ezine ezivame ukusetshenziswa: 155Mbps, 1.25Gbps, 2.5Gbps kanye ne-10Gbps. Izinga lokudlulisela ngokuvamile liphansi. Ngaphezu kwalokho, kunezinhlobo ze-3 zesivinini se-2Gbps, i-4Gbps ne-8Gbps yamamojula optical kumasistimu okugcina optical (SAN).

Ngemva kokuqonda lezi zinhlaka ezintathu ezingenhla zemojuli ye-optical module, ingabe unokuqonda kokuqala kwemojula yokubona? Uma ufuna ukuqonda okwengeziwe, ake sibheke amanye amapharamitha wemojula yokubona!

I-1.Ukulahlekelwa nokuhlakazeka: Kokubili kuthinta kakhulu ibanga lokudlulisela lemojula ye-optical. Ngokuvamile, ukulahlekelwa kwesixhumanisi kubalwa ku-0.35dBm/km ku-1310nm optical module, futhi ukulahlekelwa kwesixhumanisi kubalwa ku-0.20dBm/km ku-1550nm optical module, futhi inani lokusabalalisa libalwa Liyinkimbinkimbi kakhulu, ngokuvamile ukuze lisetshenziswe kuphela;

I-2.Ukulahlekelwa nokuhlakazeka kwe-chromatic: Le mingcele emibili isetshenziselwa ikakhulukazi ukuchaza ibanga lokudlulisela lomkhiqizo, ukukhishwa kwe-optical kwamamojula we-optical anamaza ahlukene, amazinga okudlulisela kanye namabanga okudlulisela Amandla nokuzwela kokuthola kuyoba okuhlukile;

3.Isigaba se-Laser: Okwamanje, amalaser asetshenziswa kakhulu yi-FP ne-DFB. Izinto ze-semiconductor kanye nesakhiwo se-resonator kokubili kuhlukile. Amalaser e-DFB ayabiza futhi asetshenziswa kakhulu kumamojula abonakalayo anamabanga okudlulisela angaphezu kuka-40km; kuyilapho amalaser e-FP eshibhile, Ngokuvamile asetshenziselwa amamojula optical anebanga lokudlulisela elingaphansi kuka-40km.

4. I-Optical fiber interface: Amamojula we-SFP optical yiwo wonke ama-interfaces e-LC, amamojula we-GBIC optical yiwo wonke ama-interfaces we-SC, kanti ezinye izixhumanisi zihlanganisa i-FC ne-ST;

5. Impilo yesevisi ye-optical module: izinga leyunifomu yamazwe ngamazwe, amahora angu-7×24 omsebenzi ongaphazamiseki amahora angu-50,000 (okulingana neminyaka engu-5);

6. Imvelo: Izinga lokushisa lokusebenza: 0~+70℃; Ukushisa kwesitoreji: -45 ~ + 80 ℃; I-voltage yokusebenza: 3.3V; Izinga lokusebenza: TTL.

Ngakho-ke ngokususelwe kusingeniso esingenhla kumapharamitha wemojula ye-optical, ake siqonde umehluko phakathi kwe-SFP optical module ne-SFP+ optical module.

1.Incazelo ye-SFP

I-SFP (i-Small form-factor pluggable) isho ukuthi i-form-factor pluggable encane ixhunywa. Kuyimojula exhumekeka kalula engasekela i-Gigabit Ethernet, i-SONET, i-Fiber Channel namanye amazinga okuxhumana futhi ixhume echwebeni le-SFPshintsha. Ukucaciswa kwe-SFP kusekelwe ku-IEEE802.3 naku-SFF-8472, engasekela isivinini esifika ku-4.25 Gbps. Ngenxa yobukhulu bayo obuncane, i-SFP ingena esikhundleni se-Gigabit Interface Converter (GBIC) eyayivamile ngaphambili, ngakho ibizwa nangokuthi i-mini GBIC SFP. NgokukhethaAmamojula we-SFPngamaza ahlukene namachweba, imbobo kagesi efanayoshintshaingaxhunywa kuzixhumi ezihlukene kanye nemicu ye-optical yamaza ahlukene.

2.Incazelo ye-SFP+

Ngenxa yokuthi i-SFP isekela kuphela izinga lokudlulisela elingu-4.25 Gbps, elingakwazi ukuhlangabezana nezidingo ezikhulayo zabantu zesivinini senethiwekhi, i-SFP+ yazalwa ngaphansi kwalesi sizinda. Izinga lokudlulisela eliphezulu likaI-SFP+ingafinyelela ku-16 Gbps. Eqinisweni, i-SFP+ inguqulo ethuthukisiwe ye-SFP. Ukucaciswa kwe-SFP+ kusekelwe ku-SFF-8431. Ezinhlelweni eziningi namuhla, amamojula e-SFP+ ngokuvamile asekela i-8 Gbit/s Fiber Channel. Imojula ye-SFP+ ithathe indawo yamamojula e-XENPAK ne-XFP ayevame ukusetshenziswa ekuqaleni kwe-10 Gigabit Ethernet ngenxa yobukhulu bayo obuncane nokusetshenziswa kahle, futhi isibe edume kakhulu imojula ye-optical ku-10 Gigabit Ethernet.

Ngemva kokuhlaziya incazelo engenhla ye-SFP ne-SFP+, kungaphethwa ngokuthi umehluko omkhulu phakathi kwe-SFP ne-SFP+ izinga lokudlulisela. Futhi ngenxa yamazinga ahlukene wedatha, izinhlelo zokusebenza namabanga okudlulisela nawo ahlukile.