Semiconductor ring laser subject to delayed optical feedback: Bifurcations and stability

• Published in: Communications in nonlinear science & numerical simulation Vol. 17; no. 12; pp. 4767 - 4779
• Main Authors: Ermakov, Ilya V., Van der Sande, Guy, Danckaert, Jan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2012
• Subjects: Asymmetry; Chaos theory; Delayed optical feedback; Feedback; Holes; Mathematical models; Optical feedback; Ring lasers; Semiconductor ring laser; Semiconductors; Delayed optical feedback; Semiconductor ring laser
• ISSN: 1007-5704; 1878-7274
• DOI: 10.1016/j.cnsns.2012.04.005

► Semiconductor ring lasers with optical feedback from one or two external cavities. ► Two symmetric external cavities→CW or periodic regime for most parameters. ► Asymmetric feedback→complex dynamics (chaos) in large parameter regions. ► Linear stability of stationary solutions calculated using DDE-BIFTOOL. We study semiconductor ring lasers subject to delayed optical feedback from one or two short external cavities. In case of two cavities we consider the feedback strengths and phases to be either symmetric or asymmetric feedback. When feedback is symmetric, the laser operates in a bi-directional continuous wave or periodic regime for most parameter values. Only for some small parameter regions complex dynamics, such as quasi-periodicity and chaos are obtained. When the feedback is asymmetric complex dynamical regimes, including chaos, are obtained in large parameter regions. We explain complex dynamical regimes obtained in both symmetric and asymmetric feedback cases by linear stability of the stationary solutions calculated using DDE-BIFTOOL.