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The influence of feedback intensity on longitudinal mode properties and optical noise in index-guided semiconductor lasers

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4 Author(s)
Acket, G.A. ; Philips Research Laboratories, Eindhoven, The Netherlands ; Lenstra, Daan ; Den Boef, A. ; Verbeek, B.

Theory and experiments on optical feedback effects in index-guided single-mode semiconductor lasers are presented. Evidence is found for the existence of a characteristic parameter C which indicates the relative strength of the optical feedback. Near the transition ( C \approx 1.0 ) from low to high feedback, the feedback-induced low-frequency intensity noise shows a maximum. At higher feedback hysteresis and instabilities are dominant, whereas the feedback-induced noise is low again.

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Quantum Electronics, IEEE Journal of  (Volume:20 ,  Issue: 10 )