{"id":5938,"date":"2026-05-14T07:03:58","date_gmt":"2026-05-14T07:03:58","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/cwdm-vs-dwdm-differences-channel-capacity-distance-cost\/"},"modified":"2026-05-25T07:46:36","modified_gmt":"2026-05-25T07:46:36","slug":"cwdm-vs-dwdm-differences-channel-capacity-distance-cost","status":"publish","type":"post","link":"https:\/\/lp.szlogic.cn\/ru\/knowledge-center\/cwdm-vs-dwdm-differences-channel-capacity-distance-cost","title":{"rendered":"What Is the Difference Between CWDM and DWDM?"},"content":{"rendered":"
\"CWDM<\/figure>\n\n\n\n

Wave Division Multiplexing (<\/strong>WDM<\/strong><\/a>)<\/strong> revolutionized fiber optics by enabling multiple data streams to travel simultaneously over a single fiber. Two dominant variants\u2014CWDM (Coarse Wavelength Division Multiplexing) <\/strong>and DWDM (Dense Wavelength Division Multiplexing)<\/strong>\u2014power modern networks. The main difference in CWDM vs. DWDM lies in channel capacity, data speed, and range. Both use wavelength-division multiplexing, but CWDM vs. DWDM offers distinct features. The table below compares key specifications in wavelength division multiplexing, such as channel spacing and amplification, using products like LINK-PP LS-CW5310-20C<\/a> and LINK-PP LS-DW3210-40I<\/a> Optical Modules.<\/p>\n\n\n\n

\n\n<\/colgroup>

Feature<\/p><\/th>

CWDM<\/p><\/th>

DWDM<\/p><\/th><\/tr>

Channel Spacing<\/p><\/td>

20 nm<\/p><\/td>

0.8 nm (100 GHz), 0.4 nm (50 GHz)<\/p><\/td><\/tr>

Number of Channels<\/p><\/td>

Up to 18<\/p><\/td>

40\u2013160<\/p><\/td><\/tr>

Transmission Distance<\/p><\/td>

short-to-medium spans<\/p><\/td>

long-haul transmission<\/p><\/td><\/tr>

Modulation Laser<\/p><\/td>

Uncooled DFB<\/p><\/td>

Cooled EML\/Tunable<\/p><\/td><\/tr>

Power Consumption<\/p><\/td>

0.5W per module<\/p><\/td>

4W per module<\/p><\/td><\/tr>

Amplification Capability<\/p><\/td>

No<\/p><\/td>

Yes<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

Key Takeaways<\/h2>\n\n\n\n