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Proceedings Paper

Self pulsations by mode degeneracy in two-section DFB lasers
Author(s): Hans-Juergen Wuensche; Uwe Bandelow; Hans Wenzel; Dominique D. Marcenac
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Paper 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.

Paper Details

Date Published: 19 June 1995
PDF: 12 pages
Proc. SPIE 2399, Physics and Simulation of Optoelectronic Devices III, (19 June 1995); doi: 10.1117/12.212494
Show Author Affiliations
Hans-Juergen Wuensche, Humboldt-Univ. Berlin (Germany)
Uwe Bandelow, Humboldt-Univ. Berlin (Germany)
Hans Wenzel, Ferdinand-Braun-Institut fuer Hoechstfrequenztechnik (Germany)
Dominique D. Marcenac, BT Labs. (United Kingdom)


Published in SPIE Proceedings Vol. 2399:
Physics and Simulation of Optoelectronic Devices III
Marek Osinski; Weng W. Chow, Editor(s)

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