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

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Abstract

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
Volume35
Issue number4
Pages (from-to)667-671
ISSN0740-3224
DOIs
Publication statusPublished - 2018

Keywords

  • 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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