Choyamba, tiyenera kumvetsetsa magawo osiyanasiyana aOptical modules, yomwe ili ndi mitundu itatu ikuluikulu (wavelength yapakati, mtunda wotumizira, mlingo wotumizira), ndipo kusiyana kwakukulu pakati pa ma modules optical kumawonekeranso mu mfundo izi.

1.Pakatikati kutalika kwa mafunde

Gawo la kutalika kwapakati ndi nanometer (nm), pakadali pano pali mitundu itatu yayikulu:

1) 850nm (MM,multimode, mtengo wotsika koma mtunda waufupi wotumizira, nthawi zambiri kufala kwa 500m);

2) 1310nm (SM, mode limodzi, kutaya kwakukulu koma kubalalitsidwa kochepa panthawi yopatsirana, yomwe imagwiritsidwa ntchito pofalitsa mkati mwa 40km);

3) 1550nm (SM, single-mode, kutayika kochepa koma kubalalitsidwa kwakukulu panthawi yopatsirana, yomwe imagwiritsidwa ntchito potumiza mtunda wautali pamwamba pa 40km, ndipo kutali kwambiri kumatha kufalikira popanda 120km).

2. Mtunda wotumizira

Kutalikirana kumatanthawuza mtunda womwe ma siginecha amawu amatha kufalikira molunjika popanda kukulitsa.Chigawocho ndi makilomita (amatchedwanso makilomita, km).Ma module a kuwala nthawi zambiri amakhala ndi mafotokozedwe awa: 550m yamitundu yambiri, 15km imodzi, 40km, 80km ndi 120km, etc. Dikirani.

3.Kutumiza kwachangu

Mlingo wotumizira umatanthawuza kuchuluka kwa ma bits (bits) a data yomwe imatumizidwa pamphindikati, mu bps.Mlingo wotumizira ndi wotsika kwambiri ngati 100M komanso mpaka 100Gbps.Pali mitengo inayi yomwe imagwiritsidwa ntchito: 155Mbps, 1.25Gbps, 2.5Gbps ndi 10Gbps.Mlingo wa kufala nthawi zambiri umakhala wotsika.Kuonjezera apo, pali mitundu ya 3 ya liwiro la 2Gbps, 4Gbps ndi 8Gbps ya ma module optical mu optical storage systems (SAN).

Mutamvetsetsa magawo atatu apamwambawa, kodi mumamvetsetsa za module ya Optical?Ngati mukufuna kumvetsetsa kwina, tiyeni tiwone magawo ena a module ya Optical!

1.Kutayika ndi kubalalitsidwa: Zonsezi zimakhudza kwambiri mtunda wotumizira wa module optical.Kawirikawiri, kutayika kwa ulalo kumawerengedwa pa 0.35dBm / km kwa 1310nm optical module, ndipo kutayika kwa chiyanjano kumawerengedwa pa 0.20dBm / km kwa 1550nm optical module, ndipo mtengo wobalalika umawerengedwa Wovuta kwambiri, kawirikawiri kuti afotokoze kokha;

2.Kutayika ndi kufalikira kwa chromatic: Magawo awiriwa amagwiritsidwa ntchito makamaka kufotokozera mtunda wa kufalikira kwa mankhwala, kutuluka kwa kuwala kwa ma modules optical ndi mafunde osiyanasiyana, maulendo opatsirana ndi maulendo opatsirana Mphamvu ndi kulandira kukhudzidwa kudzakhala kosiyana;

Gulu la 3.Laser: Pakali pano, ma laser omwe amagwiritsidwa ntchito kwambiri ndi FP ndi DFB.Zida za semiconductor ndi mawonekedwe a resonator a awiriwa ndi osiyana.Ma lasers a DFB ndi okwera mtengo ndipo amagwiritsidwa ntchito kwambiri pama module a kuwala okhala ndi mtunda wopitilira 40km;pomwe ma laser a FP ndi otchipa, Amagwiritsidwa ntchito ngati ma module owoneka ndi mtunda wopitilira 40km.

4. Mawonekedwe a fiber optical: SFP optical modules ndi LC interfaces, GBIC optical modules ndi SC interfaces, ndi mawonekedwe ena akuphatikizapo FC ndi ST;

5. Moyo wautumiki wa optical module: yunifolomu yapadziko lonse, 7 × 24 maola osasokonezeka kwa maola 50,000 (ofanana ndi zaka 5);

6. Chilengedwe: Kutentha kwa ntchito: 0 ~ + 70 ℃;Kutentha kosungira: -45 ~ + 80 ℃;Mphamvu yogwira ntchito: 3.3V;Mulingo wogwira ntchito: TTL.

Chifukwa chake kutengera zomwe zili pamwambapa za magawo a module optical, tiyeni timvetsetse kusiyana pakati pa SFP Optical module ndi SFP + Optical module.

1.Tanthauzo la SFP

SFP (Small form-factor pluggable) imatanthawuza plugable yaying'ono yopanga mawonekedwe.Ndi gawo lotha pluggable lomwe lingathe kuthandizira Gigabit Ethernet, SONET, Fiber Channel ndi njira zina zoyankhulirana ndikulowetsa mu SFP doko la switch.Mafotokozedwe a SFP amachokera ku IEEE802.3 ndi SFF-8472, yomwe imatha kuthandizira kuthamanga mpaka 4.25 Gbps.Chifukwa cha kukula kwake kochepa, SFP imalowa m'malo mwa Gigabit Interface Converter (GBIC) yodziwika kale, motero imatchedwanso mini GBIC SFP.PosankhaZithunzi za SFPndi mafunde osiyanasiyana ndi madoko, doko lamagetsi lomwelo pa switch limatha kulumikizidwa ku zolumikizira zosiyanasiyana ndi ulusi wowoneka bwino wamitundu yosiyanasiyana.

2.Tanthauzo la SFP +

Chifukwa SFP imangothandizira kufalikira kwa 4.25 Gbps, komwe sikungakwaniritse zomwe anthu akuchulukira pa liwiro la netiweki, SFP + idabadwa pansi pa izi.Pazipita kufala mlingo waSFP +akhoza kufika 16 Gbps.M'malo mwake, SFP + ndi mtundu wowonjezera wa SFP.Mafotokozedwe a SFP + amachokera ku SFF-8431.M'mapulogalamu ambiri masiku ano, ma modules a SFP + nthawi zambiri amathandizira 8 Gbit / s Fiber Channel. SFP + module yalowa m'malo mwa XENPAK ndi XFP ma modules omwe amagwiritsidwa ntchito kwambiri kumayambiriro kwa 10 Gigabit Ethernet chifukwa cha kukula kwake kochepa komanso ntchito yabwino, ndipo yakhala gawo lodziwika kwambiri la Optical mu 10 Gigabit Ethernet.

Pambuyo pofufuza tanthauzo lapamwamba la SFP ndi SFP +, tinganene kuti kusiyana kwakukulu pakati pa SFP ndi SFP + ndiko kufalikira.Ndipo chifukwa cha mitengo yosiyana ya deta, ntchito ndi maulendo otumizira zimakhalanso zosiyana.