CWDM (Coarse Wavelength Division Multiplexing) ndi DWDM (Dense Wavelength Division Multiplexing) ndi matekinoloje omwe amagwiritsidwa ntchito mu maukonde a optical kuti awonjezere mphamvu ya ma fiber optic links polola njira zingapo (zizindikiro) kuti zifalitsidwe nthawi imodzi pa ulusi womwewo koma pa ma wavelength osiyanasiyana a kuwala. Nazi kusiyana kwakukulu pakati pa ma transceivers a CWDM ndi DWDM optical:

Kutalikirana kwa Mafunde:

CWDM: Ma channels ali ndi mtunda wa nanometers 20 (nm). Kawirikawiri, CWDM imagwiritsa ntchito ma wavelengths kuyambira 1270 nm mpaka 1610 nm, ndi ma channels 18 onse mu spectrum.
DWDM: Ma channel amakhala pafupi kwambiri, nthawi zambiri amakhala 0.8 nm (100 GHz grid) kapena 0.4 nm (50 GHz grid). Izi zimathandiza makina a DWDM kuthandizira ma channel ambiri mkati mwa spectral range yomweyo.

Chiwerengero cha Ma Channel:

CWDM: Imathandizira njira zochepa, nthawi zambiri mpaka njira 18.
DWDM: Imathandizira njira zambiri, mwina njira zokwana 80 kapena kuposerapo mu C-band (1530-1565 nm) kapena kuposerapo ndi C-band yowonjezereka ndi L-band.

Mtunda Wotumizira:

CWDM: Kawirikawiri imagwiritsidwa ntchito pa mtunda waufupi, mpaka 80 km popanda kukulitsa, komanso mpaka 120 km yokhala ndi kukulitsa kwa kuwala.
DWDM: Yopangidwira mtunda wautali, kuyambira 100 km mpaka 4000 km kapena kuposerapo kutengera mtundu wa kukulitsa ndi kufalikira komwe kwagwiritsidwa ntchito.

Kukhazikika kwa Channel:

CWDM: Ma channel ali ndi malo otalikirana kwambiri, zomwe zimapangitsa kuti asasokonezedwe mosavuta komanso zimachepetsa chiwerengero cha ma channel omwe alipo.
DWDM: Ma channels ali pafupi kwambiri, zomwe zimafuna kuwongolera bwino ma wavelengths ndi zigawo zapamwamba kwambiri kuti apewe kusokonezana pakati pa ma channels oyandikana nawo.

Mtengo:

CWDM: Kawirikawiri ndi yotsika mtengo kuposa DWDM chifukwa cha mapangidwe osavuta a transceiver komanso njira zochepa.
DWDM: Mtengo woyambira wokwera chifukwa cha mapangidwe ovuta kwambiri a transceiver komanso kufunikira kwa zigawo zowunikira zolondola komanso njira zokhazikika.

Kusinthasintha:

CWDM: Yosavuta kuyika m'maukonde ang'onoang'ono mpaka apakatikati komwe kumafunika ma wavelength ochepa, komanso komwe mtengo ungakhale wodetsa nkhawa.
DWDM: Imapereka kukula kwakukulu ndi mphamvu, zomwe zimapangitsa kuti ikhale yoyenera ma netiweki akuluakulu komanso ma transmissions akutali komwe kugwiritsa ntchito bwino bandwidth ya fiber ndikofunikira kwambiri.

Mwachidule, kusankha pakati pa ma transceivers a CWDM ndi DWDM kumadalira zinthu monga mphamvu yofunikira, mtunda wotumizira, kuganizira za mtengo, ndi zosowa zenizeni za zomangamanga za netiweki. CWDM ndi yosavuta komanso yotsika mtengo pa mtunda waufupi ndi ma netiweki ang'onoang'ono, pomwe DWDM imapereka mphamvu yayikulu, kufikira kwakutali, komanso kufalikira kwa ntchito zazikulu komanso zovuta.