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Related Experiment Videos

Yb-doped KY(WO4)2 planar waveguide laser.

Yaroslav E Romanyuk1, Camelia N Borca, Markus Pollnau

  • 1Advanced Photonics Laboratory, Institute of Imaging and Applied Optics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland. yaroslav.romanyuk@epfl.ch

Optics Letters
|January 20, 2006
PubMed
Summary

High-quality optical waveguides made from Ytterbium-doped potassium yttrium tungstate (Yb:KY(WO4)2) were successfully grown. This marks the first demonstration of laser operation in such Yb:KY(WO4)2 waveguides, achieving high output power and efficiency.

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Area of Science:

  • Materials Science
  • Optics and Photonics
  • Laser Physics

Background:

  • Monoclinic potassium yttrium tungstate (KY(WO4)2) is a promising gain material for lasers.
  • Optical waveguides are crucial for integrated photonics and miniaturized laser devices.
  • Previous research has not demonstrated laser operation in Yb-doped KY(WO4)2 waveguides.

Purpose of the Study:

  • To grow high-quality monoclinic Yb-doped KY(WO4)2 optical waveguides.
  • To demonstrate continuous-wave laser operation in these waveguides for the first time.
  • To characterize the laser performance, including output power and slope efficiency.

Main Methods:

  • Liquid-phase epitaxy (LPE) was employed for growing the Yb-doped KY(WO4)2 optical waveguides.
  • Both surface and buried planar waveguide structures were fabricated.

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  • Laser performance was tested under continuous-wave (CW) pumping near 1 micrometer wavelength.

    • Main Results:

    • High-quality monoclinic Yb-doped KY(WO4)2 optical waveguides were successfully grown.
    • Continuous-wave laser emission was achieved from both surface and buried planar waveguides.
    • An output power of 290 mW was obtained in the fundamental mode with a slope efficiency exceeding 80%.

    Conclusions:

    • The first successful demonstration of laser operation in Yb-doped KY(WO4)2 optical waveguides was achieved.
    • Yb-doped KY(WO4)2 waveguides are suitable for high-performance laser applications.
    • This work opens new possibilities for integrated photonics using Yb-doped KY(WO4)2.