Fiber Optics News

DWDM, CWDM Technologies Can Co-Exist.

Course wavelength division multiplexing (CWDM) has become an attractive alternative to some traditional dense wavelength division multiplexing (DWDM) applications, especially due to its lower cost. Recent price pressures in the optical access (or metro edge) market have brought down the price per optical channel. CWDM and DWDM can co-exist as separate networks or as mixed network solutions, sometimes even residing at the same shelves. According to Gabriel Yavor, who works for the Network-Ready Products Division of JDS Uniphase, deploying both CWDM and DWDM in an environment could result in lowered carrier costs and another added bonus: good scalability over the lifetime of the equipment.

CWDM equipment vendors have reduced system prices significantly by removing costly elements and margin reduction in comparison to DWDM systems. CWDM transmission uses uncooled, low-cost laser diodes in 20-nanometer spaced wavelengths as defined by the ITU-T standard G. …

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