Mitigation of the back-reflection disturbances in semiconductor lasers taking advantage of the self-mixing signal properties

Enrico M. Randone; Silvano Donati

doi:10.1117/12.803925

5 June 2008 Mitigation of the back-reflection disturbances in semiconductor lasers taking advantage of the self-mixing signal properties

Enrico M. Randone, Silvano Donati

Author Affiliations +

Proceedings Volume 7022, Advanced Laser Technologies 2007; 70220H (2008) https://doi.org/10.1117/12.803925
Event: Advanced Laser Technologies 2007, 2007, Levi, Finland

Abstract

It is well known that back-reflections in single mode semiconductor lasers usually lead to line broadening and amplitude increase of noise. We will show that a particular choice of the laser bias, which we have called the crossover working point, is helpful to mitigate these effects. Starting the analysis using a self-mixing interferometer, we demonstrate a decrease of the disturbances as high as 40dB in the weak and moderate feedback regimes. We also extend the analysis for incoherent and coherent feedback for the case of high level of injection arising from an all-fiber setup. Two different semiconductor laser devices have been tested to verify the analysis predictions, with good agreement with experimental results.

Citation Download Citation

Enrico M. Randone and Silvano Donati "Mitigation of the back-reflection disturbances in semiconductor lasers taking advantage of the self-mixing signal properties", Proc. SPIE 7022, Advanced Laser Technologies 2007, 70220H (5 June 2008); https://doi.org/10.1117/12.803925

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