Self pulsations by mode degeneracy in two-section DFB lasers

Hans-Juergen Wuensche; Uwe Bandelow; Hans Wenzel; Dominique D. Marcenac

doi:10.1117/12.212494

19 June 1995 Self pulsations by mode degeneracy in two-section DFB lasers

Hans-Juergen Wuensche, Uwe Bandelow, Hans Wenzel, Dominique D. Marcenac

Proceedings Volume 2399, Physics and Simulation of Optoelectronic Devices III; (1995) https://doi.org/10.1117/12.212494
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

We show theoretically, that the detuning between the stop bands of the two DFB sections gives rise to different self pulsation types: i) dispersive self Q-switching of a single mode (around 10 GHz repetition rate), or ii) beating oscillations between two modes of equal threshold gain (more than 100 GHz). Our analysis is based on the dynamic coupled wave equations, together with carrier rate equations. Using a mode expansion of the optical field, we perform a stability and bifurcation analysis as well as a direct numerical integration of the full equations, which demonstrates the stability and bifurcation analysis as well as a direct numerical integration of the full equations, which demonstrated the appearance of the two self pulsation types. In the examples investigated, we find finite self pulsation islands in the plane spaned by the two currents, which is in qualitative agreement with published experimental results.

Citation Download Citation

Hans-Juergen Wuensche, Uwe Bandelow, Hans Wenzel, and Dominique D. Marcenac "Self pulsations by mode degeneracy in two-section DFB lasers", Proc. SPIE 2399, Physics and Simulation of Optoelectronic Devices III, (19 June 1995); https://doi.org/10.1117/12.212494

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