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Optical frequency control for DWDM networks using sum-frequency generation in multilayer waveguides

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5 Author(s)
Guy, M. ; Dept. de Genie Electr., Laval Univ., Que., Canada ; Villeneuve, B. ; Svilans, M. ; Tetu, M.
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Future high bit-rate DWDM networks will require an ensemble of laser sources whose frequencies can be set accurately. Considering the excellent short-term wavelength stability of today's DFB semiconductor lasers, network frequency management could be accomplished through periodic measurement and correction of essentially free-running sources. We present experimental results on a novel technique for measuring and controlling the wavelength of a semiconductor laser using the non-linear properties of a multilayer waveguide. Using the described calibration procedure, absolute optical frequency control of a 1.3 μm DFB laser within better than 2 GHz is demonstrated. Our technique allows full flexibility in channel frequency assignment, is already compatible with projected DWDM network wavelength control requirements and lends itself to monolithic optical integration.

Published in:

Photonics Technology Letters, IEEE  (Volume:6 ,  Issue: 3 )