Thulium channel waveguide laser with 1.6 W of output power and ~80% slope efficiency

K. van Dalfsen, S. Aravazhi, C. Grivas, S.M. García-Blanco, M. Pollnau

Research output: Contribution to journalArticleAcademicpeer-review

97 Citations (Scopus)


Laser experiments were performed on buried, ridge-type channel waveguides in 8 at.% thulium-doped, yttrium– gadolinium–lutetium co-doped potassium double tungstate. By pumping with a Ti:sapphire laser at 794 nm, 1.6 W of output power at 1.84 μm with a maximum slope efficiency of ∼80% was obtained in a laser resonator with a high output-coupling degree of 89%. To the best of our knowledge, this result represents the most efficient 2-μm channel waveguide laser to date.
Original languageEnglish
Pages (from-to)4380-4383
Number of pages4
JournalOptics letters
Issue number15
Publication statusPublished - Aug 2014


  • IOMS-APD: Active Photonic Devices
  • Infrared and far-infrared lasers
  • Integrated optics materials
  • Lasers
  • Waveguides
  • Channeled
  • Solid state
  • Thin film devices and applications


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