Dynamics of a green high-power tunable external-cavity broad-area GaN diode laser

Mingjun Chi*, Ole Bjarlin Jensen, Anders Kragh Hansen, Paul Michael Petersen

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Although external-cavity feedback with a grating is widely used to achieve a tunable high-power narrow-linewidth broad-area diode laser (BAL) system, the dynamics of such a system is seldom studied. In this paper, the temporal dynamics of a tunable high-power green external-cavity diode laser system based on a GaN BAL and Littrow external-cavity is investigated experimentally. The regular pulse package oscillation (PPO) is observed just above the threshold. The oscillating period of the pulse package decreases with the increasing injected current. As the current increases further, the pulse package oscillates irregularly, and finally changes to a chaotic state. The PPO is observed, for the first time to our knowledge, in a BAL with an external-cavity grating feedback.
    Original languageEnglish
    JournalOptical Society of America. Journal B: Optical Physics
    Issue number4
    Pages (from-to)667-671
    Publication statusPublished - 2018


    • Semiconductor Lasers
    • Diodes
    • Dynamics
    • III-V semiconductors
    • Semiconductor lasers
    • Broad area diode lasers
    • External cavity diode laser systems
    • External cavity feedback
    • Injected current
    • Littrow external cavities
    • Narrow-line width
    • Regular pulse packages
    • Temporal dynamics
    • Gallium nitride


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