Green high-power tunable external-cavity GaN diode laser at 515 nm

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A 480 mW green tunable diode laser system is demonstrated for the first time to our knowledge. The laser system is based on a GaN broad-area diode laser and Littrow external-cavity feedback. The green laser system is operated in two modes by switching the polarization direction of the laser beam incident on the grating. When the laser beam is p-polarized, an output power of 50 mW with a tunable range of 9.2 nm is achieved. When the laser beam is s-polarized, an output power of 480 mW with a tunable range of 2.1 nm is obtained. This constitutes the highest output power from a tunable green diode laser system.
Original languageEnglish
JournalOptics Letters
Issue number18
Pages (from-to)4154-4157
Publication statusPublished - 2016


  • Atomic and Molecular Physics, and Optics
  • Angle measurement
  • Diodes
  • Gallium nitride
  • Semiconductor lasers
  • Broad area diode lasers
  • External cavity
  • Laser systems
  • Littrow external cavities
  • Output power
  • P-polarized
  • Polarization direction
  • Tunable diode lasers
  • Laser beams

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