Nyob rau hauv kev tsim kho ntawm cheeb tsam cheeb tsam network (tshwj xeeb tshaj yog nyob deb OTN optical transmission networks), wavelength division multiplexing khoom yog ib qho tseem ceeb tshwj xeeb. DWDM ntom wavelength division multiplexing khoom muaj peev xwm kis tau tus mob ntev, siab bandwidth; CWDM coarse wavelength division multiplexing khoom muaj tus nqi qis dua. Yog li yog tias koj xaiv qhov zoo wavelength division multiplexing khoom los tsim kom muaj txiaj ntsig zoo ntawm kev sib kis ntawm qhov muag?

Dab tsi yog qhov txawv ntawmCWDM/DWDM Multiplexer?

Tam sim no, txoj hauv kev zoo los daws cov ntaub ntawv txuas ntxiv txuas ntxiv yog siv CWDM wavelength division multiplexing khoom thiab DWDM wavelength division multiplexing khoom, tab sis lawv txawv ntawm ntau yam.

(1) Channel sib nrug ntawm CWDM wavelength division multiplexing khoom thiab DWDM wavelength division multiplexing khoom

Channel sib nrug yog txhais raws li qhov sib txawv ntawm nominal cab kuj zaus ntawm ob qhov chaw kho qhov muag channel, thiab feem ntau yog siv los tiv thaiv inter-channel cuam tshuam. CWDM wavelength division multiplexing khoom muaj qhov dav dav dua li DWDM wavelength division multiplexing khoom. Nws tuaj yeem xa 18 wavelengths nyob rau hauv ib daim phiaj spectral los ntawm 1271 nm mus rau 1611 nm nrog ib tug channel sib nrug ntawm 20 nm. DWDM wavelength division multiplexing khoom tuaj yeem xa 40, 80 lossis 160 wavelengths, thiab qhov sib nrug ntawm cov channel tuaj yeem yog 0.8 nm.

(2) Kev sib kis deb ntawm CWDM wavelength division multiplexing khoom thiab DWDM wavelength division multiplexing khoom

Vim hais tias lub wavelength ntawm ntom wavelength division multiplexing khoom (DWDM) muaj kev koom ua ke nyob rau hauv cov txheej txheem fiber ntau kis tau tus mob, DWDM wavelength division multiplexing khoom yuav kis tau ntev tshaj li CWDM wavelength division multiplexing khoom. CWDM wavelength division multiplexing cov cuab yeej tam sim no tsis tuaj yeem ua tiav qhov kev ncua deb tsis pub dhau, thiab nws qhov siab tshaj plaws kis tau tus mob tsuas yog 160 mais, thaum qhov kev sib kis ntawm DWDM wavelength division multiplexing cov cuab yeej deb tshaj li ntawm CWDM wavelength division multiplexing khoom.

(3) Modulated lasers ntawm CWDM wavelength division multiplexing khoom thiab DWDM wavelength division multiplexing khoom

Lub kaw lus ntawm CWDM wavelength division multiplexing khoom muaj qhov yuav tsum tau tsawg ntawm cov kev qhia ntawm lub laser, thiab feem ntau siv lub laser uncooled; Lub kaw lus ntawm DWDM wavelength division multiplexing cov cuab yeej yuav tsum tau siv lub tshuab cua txias, thiab lub tshuab cua txias siv txoj kev hloov kho kub kom ntseeg tau tias DWDM system muaj kev ua tau zoo dua, kev nyab xeeb dua thiab kev pab lub neej ntev dua, yog li DWDM wavelength division multiplexer nws siv zog ntau dua. tshaj CWDM wavelength division multiplexing khoom siv uncooled lasers

(4) Tus nqi ntawm CWDM wavelength division multiplexing khoom thiab DWDM wavelength division multiplexing khoom

Lub kaw lus ntawm DWDM wavelength division multiplexing khoom muaj qhov tsis sib xws ntawm qhov kub thiab txias hauv qhov dav wavelength, yog li thaum lub tshuab cua txias laser siv los kho qhov kub thiab txias, kev siv cov nqi ntawm DWDM wavelength division multiplexing khoom yog nce. Tsis tas li ntawd, lub kaw lus ntawm DWDM wavelength division multiplexing khoom feem ntau yog plaub mus rau tsib zaug kim tshaj li qhov system ntawm CWDM wavelength division multiplexing khoom. Txawm li cas los xij, nrog kev nce qib ntawm qhov ntom ntom wavelength division multiplexers (DWDM), tus nqi ntawm DWDM optical modules yog ze li ntawm 20% -25% qis dua li ntawm CWDM optical modules.