Tolerance to Optical Feedback of 10-Gb/s Quantum-Dash-Based Lasers Emitting at 1.51 $\mu$m

Tolerance to optical feedback is investigated on quantum-dash-based lasers emitting at 1.51 mum. The onset of coherence collapse regime is experimentally determined using three criteria: optical spectrum broadening, relative intensity noise increase, and bit-error-rate degradation. Measurements were...

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Bibliographic Details
Published in:IEEE photonics technology letters 2007-08, Vol.19 (15), p.1181-1183
Main Authors: Azouigui, S., Dagens, B., Lelarge, F., Provost, J. G., Accard, A., Grillot, F., Martinez, A., Zou, Q., Ramdane, A.
Format: Article
Language:English
Subjects:
Coherence
Collapse
Criteria
Dynamic tests
Emittance
Lasers
Optical feedback
Tolerances
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Summary:Tolerance to optical feedback is investigated on quantum-dash-based lasers emitting at 1.51 mum. The onset of coherence collapse regime is experimentally determined using three criteria: optical spectrum broadening, relative intensity noise increase, and bit-error-rate degradation. Measurements were first performed in static operation at different current values, using the first and second criteria. The onset of coherence collapse was found to increase from ~-41 to -27 dB with the bias current. Then tolerance to optical feedback was assessed in dynamic operation at 10 Gb/s, using the third criterion. In spite of a relatively high linewidth enhancement factor , (alphaH ~4.5) a -32-dB onset of coherence collapse corresponding to -24-dB maximum optical return loss tolerance was achieved at 10-Gb/s rate.
ISSN:1041-1135
DOI:10.1109/LPT.2007.901492