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CWDM

   Also found in: Acronyms 0.03 sec.

CWDM

(Course WDM) An optical transmission method that is used for shorter distances than dense WDM (DWDM). Also known as "wide WDM," CWDM transmits fewer channels and uses wider spacing between the channels for distances up to 60 km. Wider spacing up to 25 nm, compared to 1.6nm and smaller for DWDM, tolerates more temperature fluctuation.

Standardized by the IEEE in 2004 for 10 Gigabit Ethernet, CWDM components are much less costly than DWDM because the laser does not have to be stabilized, and an external modulator is not required. The laser can be modulated directly by changing the drive current. CWDM operates between 1265 and 1625 nm compared to DWDM's tighter 1530-1620 range. See WDM.



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In order to lower costs, CWDM is an excellent alternative to DWDM deployments, as they require less expensive lasers and simplified "plug & play" hardware.
OFS AND MRV DEMO 1400 NM TRANSMISSION OVER ZERO WATER PEAK FIBER AT ... by EDP Weekly's IT Monitor
Ekinops designs and manufactures optical transport, DWDM, CWDM and aggregation solutions.
Ecritel Increases Capacity of Its Fiber-Optic Network with Ekinops' ... by Business Wire
Apogee Photonics' Uncooled 20Gb/s and 25Gb/s 1310nm CWDM Lasers Enable Emerging 100GbE Optical Standards
Apogee Photonics Introduces Next Generation Lasers for 100 Gigabit ... by Business Wire
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