Return-map for semiconductor lasers with optical feedback

Jesper Mørk, Bjarne Tromborg, H. Sabbatier, Mads Peter Sørensen

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It is well known that a semiconductor laser exposed to moderate optical feedback and biased near threshold exhibits the phenomenon of low-frequency intensity fluctuations (LFF). While this behavior can be numerically simulated using the so-called Lang-Kobayshi model, the interpretation of the phenomenon has remained a controversy. The LFF consist of a sudden drop in intensity followed by a build-up in steps of the external cavity roundtrip time, τ, before a new drop-out occurs. The phenomenon has been attributed to a kind of chaotic itinerancy and a bifurcation cascade has been identified very recently. These results give insight into the behavior observed on a short time-scale, but do not explain some of the pronounced features of the LFF seen for moderate feedback levels; namely the stepwise build-up and its characteristic time of about 15 steps close to the solitary laser threshold. We present new results related to the slow time-scale behaviour of LFF which give a simple explanation of these general characteristics, as well as providing a new tool for studying the statistics of the LFF.
Original languageEnglish
Title of host publication1999 IEEE LEOS Annual Meeting Conference Proceedings
Place of PublicationSan Francisco
Publication date1999
ISBN (Print)0-7803-5634-9
Publication statusPublished - 1999
Event12th Annual Meeting of the IEEE Lasers and Electro-Optics Society 1999 - San Francisco, CA, United States
Duration: 8 Nov 199911 Nov 1999
Conference number: 12


Conference12th Annual Meeting of the IEEE Lasers and Electro-Optics Society 1999
CountryUnited States
CitySan Francisco, CA
Internet address

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