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Characterization of Frequency Drift of Sampled-Grating DBR Laser Module Under Direct Modulation

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7 Author(s)

The authors demonstrate the drift in frequency of a static sampled-grating distributed Bragg reflector (SG DBR) laser module when it is subjected to direct modulation. The magnitude of drift and its settling time is characterized as a function of the index of modulation. Results show that when the directly modulated SG DBR is optically filtered, as in a dense wavelength-division-multiplexed system, a power penalty of 6.7 dB is incurred in comparison to the unfiltered case.

Published in:

Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 2 )