Integrated semiconductor laser with optical feedback

transition from short to long cavity regime

Joshua P. Toomey, Deborah M. Kane, Christopher McMahon, Apostolos Argyris, Dimitris Syvridis

Research output: Contribution to journalArticle

26 Citations (Scopus)


A 4-section semiconductor laser with integrated optical feedback has been shown experimentally to be capable of operating in either the short- or long-cavity regime, by controlling the device relaxation oscillation frequency relative to the external cavity frequency. Systematic increase of the laser injection current, and the resulting increase in relaxation oscillation frequency, allowed the transition between the two regimes of operation to be observed. The system displayed a gradual transition from a dynamic dominated by regular pulse packages in the short-cavity regime to one dominated by broadband chaotic output when operating in the long-cavity regime. This suggests that the "short cavity" regular pulse packages continue to co-exist with the "long cavity" broadband chaotic dynamic in the system studied. It is the relative power associated with each of these dynamics that changes. This may occur more generally in similar systems.

Original languageEnglish
Pages (from-to)18754-18762
Number of pages9
JournalOptics Express
Issue number14
Publication statusPublished - 13 Jul 2015

Fingerprint Dive into the research topics of 'Integrated semiconductor laser with optical feedback: transition from short to long cavity regime'. Together they form a unique fingerprint.

Cite this