Abstract

Absolute laser-frequency assignment and stabilization in projected dense wavelength-division-multiplexing (DWDM) networks remain an unsolved problem. Recently, different studies^1,2 have shown that DFB lasers present very good free-running wavelength stability. Those results suggest that frequency control in DWDM networks could be performed through periodic measurement and correction of free-running semiconductor lasers. To realize this task, a high-resolution wavelength meter is needed. Although such instruments are commercially available, they mainly exist in the form of cumbersome mechanically scanned Michelson interferometers. For field use, a solid-state implementation would be preferable.

© 1995 Optical Society of America