Stability of the single-mode output of a laser diode array with phase conjugate feedback

S. Juul Jensen, M. Løbel, P.M. Petersen

    Research output: Contribution to journalJournal articlepeer-review

    Abstract

    The stability of the output of a single-mode laser diode array with frequency selective phase conjugate feedback has been investigated experimentally. Both the long-term stability of the laser output and the sensitivity to feedback generated by external reflection of the output beam are examined. The output power and the center wavelength are found to be extremely stable in a 100 h stability measurement. External feedback of the output beam into the laser is seen to decrease both the spatial and the temporal coherence of the output significantly. We outline an approach to obtain a stable single-mode output when external feedback is present using spatial filtering in the path of the output beam. (C) 2000 American Institute of Physics.
    Original languageEnglish
    JournalApplied Physics Letters
    Volume76
    Issue number5
    Pages (from-to)535-537
    ISSN0003-6951
    DOIs
    Publication statusPublished - 2000

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