Coherence collapse in single-mode semiconductor lasers due to optical feedback

  title={Coherence collapse in single-mode semiconductor lasers due to optical feedback},
  author={Daan Lenstra and B H Verbeek and A. J. den Boef},
  journal={IEEE Journal of Quantum Electronics},
Line broadening up to 25 GHz in a single-mode semiconductor laser with relatively strong optical feedback is reported and theoretically analyzed. Measurements of the coherence function were performed using a Michelson interferometer and demonstrate that the coherence length decreases by a factor 1000 (to approximately 10 mm) due to optical feedback. A self-consistent theoretical description is given, which is based on the view that coherence collapse is maintained due to optical-feedback-delay… CONTINUE READING
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