Wavelength tracking of a remote WDM router in a passive optical network
- 1 September 1996
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 8 (9) , 1238-1240
- https://doi.org/10.1109/68.531848
Abstract
We propose, analyze, and demonstrate a simple, robust method which enables a laser to track uncontrolled changes in a remotely located WDM device. As opposed to locking to a wavelength standard, our method locks the wavelength comb of a tunable DBR to a waveguide grating router (200-GHz channel spacing). We have demonstrated tracking at a 1 C/min temperature slew rate without requiring sacrificial channels, a pilot tone, or analog dithering circuitry. We discuss tradeoffs between step size, slew rate, measurement accuracy, and power penalty.Keywords
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