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Efficient 2.9 μm fluorozirconate glass waveguide chip laser.

David G Lancaster1, Simon Gross, Heike Ebendorff-Heidepriem

  • 1Institute for Photonics and Advanced Sensing and School of Chemistry and Physics, University of Adelaide, South Australia, Australia. david.lancaster@adelaide.edu.au

Optics Letters
|August 14, 2013
PubMed
Summary

We developed a large mode-area holmium-doped ZBLAN waveguide laser emitting at 2.9 μm. This novel laser, pumped by a 1150 nm diode laser, shows promising efficiency for various applications.

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Area of Science:

  • Laser Physics
  • Materials Science
  • Photonics

Background:

  • Rare-earth-doped glasses are crucial for developing advanced laser systems.
  • Waveguide lasers offer compact and efficient light generation.
  • ZBLAN glass is a promising host material for mid-infrared applications.

Purpose of the Study:

  • To demonstrate a large mode-area holmium-doped ZBLAN waveguide laser.
  • To investigate the performance of such a laser when pumped by a 1150 nm diode laser.
  • To characterize the laser's threshold, output power, and slope efficiency.

Main Methods:

  • Fabrication of depressed cladding waveguides using ultrafast laser inscription in rare-earth-doped bulk glass.
  • Pumping the holmium-doped ZBLAN waveguide with a 1150 nm diode laser.

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  • Characterization of laser output power and efficiency.

    • Main Results:

    • A large mode-area holmium-doped ZBLAN waveguide laser operating at 2.9 μm was successfully demonstrated.
    • The laser exhibited a low threshold power of 28 mW.
    • Up to 27 mW of output power was achieved with an internal slope efficiency of approximately 20%.

    Conclusions:

    • Ultrafast laser inscribed ZBLAN waveguides are suitable for efficient 2.9 μm laser operation.
    • The demonstrated holmium-doped waveguide laser shows potential for mid-infrared applications.
    • Further optimization could lead to higher output powers and efficiencies.