Journal
OPTICS COMMUNICATIONS
Volume 244, Issue 1-6, Pages 355-365Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2004.09.058
Keywords
broad-area semiconductor laser; spatiotemporal dynamics; delay-instabilities; chaos control; laser resonators
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We present investigations of the influence of spatially filtered optical feedback on a broad-area semiconductor laser's spatiotemporal emission dynamics. Our measurements reveal the ambiguous effect of optical feedback on the emission behavior of the broad-area laser. The measurements confirm that optical feedback can have a stabilizing effect on the inherent spatiotemporal instabilities exhibited by solitary broad-area lasers. Moreover, at high feedback strengths, we observe feedback-induced instabilities instead of the inherent spatiotemporal instabilities, thus, a destabilizing effect of optical feedback. The results are complemented and extended by measurements of the optical spectrum, which demonstrate that stabilization of the emission dynamics by optical feedback is accompanied by a drastic reduction of the number of modes contributing to the emission. (C) 2004 Elsevier B.V. All rights reserved.
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