Ua ntej ntawm tag nrho cov, peb yuav tsum to taub ntau yam tsis muajoptical modules, ntawm uas muaj peb hom tseem ceeb (central wavelength, kis nrug deb, kis tus nqi), thiab lub ntsiab sib txawv ntawm optical modules kuj muaj nyob rau hauv cov ntsiab lus no.
1.Center wavelength
Chav tsev ntawm qhov nruab nrab wavelength yog nanometer (nm), tam sim no muaj peb hom loj:
1) 850nm (MM),ntau hom, tus nqi qis tab sis luv luv kis tau tus mob, feem ntau tsuas yog 500m kis tau tus mob);
2) 1310nm (SM, ib hom, loj poob tab sis me me dispersion thaum kis tau tus mob, feem ntau yog siv rau kis nyob rau hauv 40km);
3) 1550nm (SM, ib hom, poob qis tab sis loj dispersion thaum lub sij hawm kis tau tus mob, feem ntau yog siv rau kev sib kis nyob deb tshaj 40km, thiab qhov deb tshaj plaws yuav kis tau ncaj qha yam tsis muaj relay 120km).
2. Kev sib kis deb
Kev sib kis nrug yog hais txog qhov kev ncua deb uas cov teeb liab kho qhov muag tuaj yeem xa ncaj qha yam tsis muaj relay amplification. Chav tsev yog kilometers (tseem hu ua kilometers, km). Optical modules feem ntau muaj cov lus qhia hauv qab no: ntau hom 550m, ib hom 15km, 40km, 80km thiab 120km, thiab lwm yam. Tos.
3. kis tus nqi
Tus nqi sib kis yog hais txog tus lej ntawm cov khoom (ntsis) ntawm cov ntaub ntawv xa mus rau ib ob, hauv bps. Tus nqi kis tau tus mob tsawg li 100M thiab siab li 100Gbps. Muaj plaub tus nqi siv ntau: 155Mbps, 1.25Gbps, 2.5Gbps thiab 10Gbps. Tus nqi sib kis feem ntau yog qis qis. Tsis tas li ntawd, muaj 3 hom kev ceev ntawm 2Gbps, 4Gbps thiab 8Gbps rau optical modules hauv optical storage systems (SAN).
Tom qab nkag siab txog qhov saum toj no peb qhov kev ntsuas qhov muag pom, koj puas muaj kev nkag siab ua ntej ntawm optical module? Yog tias koj xav tau kev nkag siab ntxiv, cia peb saib lwm qhov tsis zoo ntawm qhov kho qhov muag module!
1.Poob thiab dispersion: Ob qho tib si feem ntau cuam tshuam rau kev sib kis deb ntawm qhov kho qhov muag module. Feem ntau, qhov txuas poob yog xam ntawm 0.35dBm / km rau 1310nm optical module, thiab qhov txuas poob yog xam ntawm 0.20dBm / km rau 1550nm optical module, thiab tus nqi dispersion yog xam nyuaj heev, feem ntau siv rau kev siv xwb;
2. Loss thiab chromatic dispersion: Ob qhov tsis zoo no feem ntau yog siv los txheeb xyuas qhov kev sib kis ntawm cov khoom, qhov muag pom ntawm cov khoom siv kho qhov muag nrog cov wavelengths sib txawv, tus nqi sib kis thiab kev sib kis ntawm lub zog thiab kev txais yuav txawv;
3.Laser qeb: Tam sim no, feem ntau siv lasers yog FP thiab DFB. Cov ntaub ntawv semiconductor thiab resonator qauv ntawm ob yog txawv. DFB lasers yog kim thiab feem ntau yog siv rau kho qhov muag modules nrog kev sib kis nrug ntau tshaj 40km; thaum FP lasers pheej yig, feem ntau yog siv rau optical modules nrog ib tug kis nrug deb ntawm tsawg tshaj li 40km.
4. Optical fiber interface: SFP optical modules yog tag nrho LC interfaces, GBIC optical modules yog tag nrho SC interfaces, thiab lwm yam interfaces muaj xws li FC thiab ST;
5. Lub neej kev pab cuam ntawm lub optical module: lub thoob ntiaj teb niaj hnub qauv, 7 × 24 teev ntawm uninterrupted ua hauj lwm rau 50,000 teev (sib npaug rau 5 xyoo);
6. Ib puag ncig: Ua haujlwm kub: 0 ~ + 70 ℃; Cia kub: -45 ~ + 80 ℃; Ua haujlwm voltage: 3.3V; Ua haujlwm theem: TTL.
Yog li, raws li cov lus qhia saum toj no rau cov khoom siv kho qhov muag, cia peb nkag siab qhov txawv ntawm SFP optical module thiab SFP + optical module.
1.Definition ntawm SFP
SFP (Small form-factor pluggable) txhais tau tias daim ntawv me me-factor pluggable. Nws yog pluggable module uas tuaj yeem txhawb Gigabit Ethernet, SONET, Fiber Channel thiab lwm yam kev sib txuas lus thiab ntsaws rau hauv SFP chaw nres nkojhloov. SFP specification yog raws li IEEE802.3 thiab SFF-8472, uas tuaj yeem txhawb nqa ceev txog 4.25 Gbps. Vim nws qhov me me, SFP hloov qhov qub Gigabit Interface Converter (GBIC), yog li nws tseem hu ua mini GBIC SFP. Los ntawm kev xaivSFP modulesnrog sib txawv wavelengths thiab ports, tib qhov hluav taws xob chaw nres nkoj ntawm lubhloovtuaj yeem txuas nrog cov khoom sib txawv thiab cov fibers optical sib txawv wavelengths.
2.Definition ntawm SFP+
Vim tias SFP tsuas yog txhawb nqa tus nqi sib kis ntawm 4.25 Gbps, uas tsis tuaj yeem ua tau raws li tib neeg cov kev xav tau ntxiv rau kev sib txuas ceev, SFP + tau yug los hauv qab no. Qhov siab tshaj plaws kis tau tus mob ntawmSFP +tuaj yeem ncav cuag 16 Gbps. Qhov tseeb, SFP + yog qhov hloov kho tshiab ntawm SFP. SFP + specification yog raws li SFF-8431. Nyob rau hauv feem ntau cov ntawv thov niaj hnub no, SFP + modules feem ntau txhawb 8 Gbit / s Fiber Channel.SFP + module tau hloov XENPAK thiab XFP modules uas tau siv ntau dua thaum ntxov 10 Gigabit Ethernet vim nws qhov me me thiab siv tau yooj yim, thiab tau dhau los ua tus Qhov nrov tshaj plaws optical module hauv 10 Gigabit Ethernet.
Tom qab txheeb xyuas cov ntsiab lus saum toj no ntawm SFP thiab SFP +, nws tuaj yeem txiav txim siab tias qhov sib txawv tseem ceeb ntawm SFP thiab SFP + yog tus nqi sib kis. Thiab vim cov ntaub ntawv sib txawv, cov ntawv thov thiab kev sib kis sib kis kuj txawv.