Hauv cov ntsiab lus ntawm cov ntaub ntawv xov xwm niaj hnub no, kev sib txuas lus kho qhov muag fiber ntau tuav txoj haujlwm tseem ceeb.Nrog rau kev txhawb nqa ntawm lub network thiab kev nce ntxiv ntawm kev sib txuas lus muaj peev xwm, kev txhim kho ntawm kev sib txuas lus kuj tseem yog ib qho kev txhim kho uas tsis muaj tseeb.Optical modulespaub optoelectronic signals hauv kev sib txuas lus kho qhov muag.Kev hloov dua siab tshiab yog ib qho tseem ceeb ntawm kev sib txuas lus fiber ntau optical.Txawm li cas los xij, peb feem ntau tham txog optical modules.Yog li, dab tsi yog qhov parameter ntawm optical modules?

Tom qab xyoo ntawm txoj kev loj hlob, optical modules tau hloov pauv lawv txoj kev ntim khoom zoo heev.SFP, GBIC, XFP, Xenpak, X2, 1X9, SFF, 200/3000pin, XPAK, QAFP28, thiab lwm yam. yog tag nrho cov optical module ntim hom;thaum qis-ceev, 100M, Gigabit, 2.5G, 4.25G, 4.9G, 6G, 8G, 10G, 40G, 100G, 200G thiab txawm 400G yog cov kis tus nqi ntawm optical modules.
Ntxiv nrog rau qhov saum toj no cov khoom siv kho qhov muag pom, muaj cov hauv qab no:

1. Nruab nrab 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 kis tau tus mob, feem ntau yog siv rau kev sib kis mus ntev tshaj 40km, thiab qhov deb tshaj plaws tuaj yeem xa ncaj qha yam tsis muaj relay rau 120km).

2. Kev sib kis deb
Kev sib kis nrug yog hais txog 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, 120km, thiab lwm yam. Tos.

3. 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;

4. Poob thiab chromatic dispersion: Ob qhov tsis zoo no feem ntau yog siv los txheeb xyuas qhov sib kis ntawm cov khoom.Optical kis tau tus mob thiab tau txais rhiab heev ntawm kho qhov muag modules sib txawv wavelengths, kis tau tus mob thiab kis tau tus mob nyob deb yuav txawv;

5. 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 ib tug kis nrug deb ntawm 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.

6. Optical fiber ntau interface: SFP optical modules yog tag nrho cov LC interfaces, GBIC optical modules yog tag nrho cov SC interfaces, thiab lwm yam interfaces xws li FC thiab ST, thiab lwm yam.;

7. Lub neej kev pab cuam ntawm optical module: lub thoob ntiaj teb niaj hnub qauv, 7 × 24 teev ntawm kev ua haujlwm tsis cuam tshuam rau 50,000 teev (sib npaug rau 5 xyoos);

8. Ib puag ncig: Ua haujlwm kub: 0 ​​~ + 70 ℃;Cia kub: -45 ~ + 80 ℃;Ua haujlwm voltage: 3.3V;Ua haujlwm theem: TTL.