CWDM (Coarse Wavelength Division Multiplexing) thiab DWDM (Dense Wavelength Division Multiplexing) yog ob qho thev naus laus zis siv hauv kev sib txuas lus optical los ua kom muaj peev xwm ntawm cov fiber optic txuas los ntawm kev tso cai rau ntau txoj kab (cov cim) kom xa tau tib lub sijhawm hla tib lub fiber tab sis ntawm ntau qhov sib txawv ntawm lub teeb. Nov yog qhov sib txawv tseem ceeb ntawm CWDM thiab DWDM optical transceivers:

Qhov Ntev Ntawm Qhov Nrug Deb:

CWDM: Cov channel yog sib nrug 20 nanometers (nm) sib nrug. Feem ntau, CWDM siv cov wavelengths los ntawm 1270 nm txog 1610 nm, nrog rau tag nrho 18 channel hauv spectrum.
DWDM: Cov channel tau sib nrug ze dua ua ke, feem ntau yog 0.8 nm (100 GHz grid) lossis 0.4 nm (50 GHz grid). Qhov no tso cai rau DWDM systems txhawb nqa ntau ntau cov channel hauv tib qhov spectral.

Tus lej ntawm cov channel:

CWDM: Txhawb nqa cov lej me dua, feem ntau txog li 18 txoj kab.
DWDM: Txhawb nqa ntau tus channel, tej zaum txog li 80 lossis ntau dua channel hauv C-band (1530-1565 nm) lossis ntau dua nrog C-band thiab L-band txuas ntxiv.

Kev Kis Nrug Deb:

CWDM: Feem ntau siv rau qhov luv dua, txog li 80 km yam tsis muaj amplification, thiab txog li 120 km nrog optical amplification.
DWDM: Tsim los rau qhov deb dua, xws li 100 km txog 4000 km lossis ntau dua nyob ntawm hom kev ua kom loj dua thiab kev them nyiaj rau kev faib tawm siv.

Kev Ruaj Ntseg ntawm Channel:

CWDM: Cov channel muaj qhov sib nrug dav dua, uas ua rau lawv tsis tshua muaj kev cuam tshuam tab sis kuj txwv tus naj npawb ntawm cov channel muaj.
DWDM: Cov channel tau ntim ze ze, uas xav tau kev tswj hwm qhov ntev ntawm cov wavelengths thiab cov khoom zoo dua kom tiv thaiv kev cuam tshuam ntawm cov channel sib ze.

Tus nqi:

CWDM: Feem ntau pheej yig dua li DWDM vim yog cov qauv tsim transceiver yooj yim dua thiab tsawg dua cov channel.
DWDM: Tus nqi pib siab dua vim yog cov qauv tsim transceiver nyuaj dua thiab qhov xav tau cov khoom siv kho qhov muag thiab cov txheej txheem ruaj khov dua.

Kev ywj pheej:

CWDM: Yooj yim dua rau kev xa mus rau hauv cov tes hauj lwm me me mus rau nruab nrab qhov twg xav tau tsawg dua wavelengths, thiab qhov twg tus nqi yuav yog qhov txhawj xeeb.
DWDM: Muab kev nthuav dav thiab peev xwm ntau dua, ua rau nws tsim nyog rau cov tes hauj lwm loj thiab kev sib kis mus deb uas qhov kev siv fiber bandwidth siab tshaj plaws yog qhov tseem ceeb.

Hauv kev xaus lus, qhov kev xaiv ntawm CWDM thiab DWDM optical transceivers nyob ntawm cov yam xws li lub peev xwm xav tau, qhov deb ntawm kev xa xov, kev txiav txim siab txog tus nqi, thiab cov kev xav tau tshwj xeeb ntawm cov khoom siv hauv network. CWDM yooj yim dua thiab pheej yig dua rau qhov deb luv dua thiab cov tes hauj lwm me dua, thaum DWDM muaj peev xwm siab dua, ncav cuag ntev dua, thiab scalability rau cov ntawv thov loj dua thiab xav tau ntau dua.