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Proceedings Paper

Dynamics of a micropillar laser with saturable absorber and delayed optical feedback (Conference Presentation)
Author(s): Bernd Krauskopf; Soizic Terrien; Neil Broderick; Sylvain Barbay
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Paper Abstract

We consider a VCSEL micropillar laser with an internal absorber section, which has been shown to show excitable behaviour before its threshold. The addition of optical feedback offers the possibility to generate a pulse train of low jitter with a repetition time that is controlled by the length of the feedback loop. We perform a bifurcation analysis of the governing Yamada equations for the intensity, gain and absorption and with delayed feedback. This reveals an increasing variety of new dynamics and a considerable degree of multistability when the delay time is increased. More concretely, we present a bifurcation/stability diagram in the plane of feedback delay and feedback strength --- the two parameters of the external feedback loop. The organising feature is a winding curve of Hopf bifurcations, which develops an increasing amount of self-intersections as the delay of the feedback is increased. Along certain parts of the Hopf curve stable periodic solutions are created, which are physically self-pulsations with an increasing number of pulses in the external cavity. Several of these self-pulsations may coexist stably, and their basins of attractions are intermingled in a complicated way. As a result, the micropillar laser is very sensitive to small perturbations and noise while in such a multistable configuration. We also find multifrequency dynamics, where the amplitude of the self-pulsations is strongly modulated.

Paper Details

Date Published: 14 March 2018
Proc. SPIE 10515, Vertical External Cavity Surface Emitting Lasers (VECSELs) VIII, 1051506 (14 March 2018); doi: 10.1117/12.2288076
Show Author Affiliations
Bernd Krauskopf, The Univ. of Auckland (New Zealand)
Soizic Terrien, The Univ. of Auckland (New Zealand)
Neil Broderick, The Univ. of Auckland (New Zealand)
Sylvain Barbay, Ctr. de Nanosciences et de Nanotechnologies (France)

Published in SPIE Proceedings Vol. 10515:
Vertical External Cavity Surface Emitting Lasers (VECSELs) VIII
Juan L. Chilla, Editor(s)

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