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Related Experiment Videos

Tunable single frequency thulium:YAG microchip laser with external feedback.

F F Heine1, G Huber

  • 1Institut für Laser-Physik, Universität Hamburg, Jungiusstrasse 9a, Hamburg 20355, Germany.

Applied Optics
|February 15, 2008
PubMed
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A novel method uses an external etalon to achieve tunable, single-frequency operation in diode-pumped thulium-doped YAG microchip lasers. This vibration-insensitive setup enables broad tuning ranges for stable laser sources.

Area of Science:

  • Lasers and Photonics
  • Solid-State Physics

Background:

  • Microchip lasers offer stable, monolithic resonator geometries.
  • Thulium-doped YAG lasers possess broad gain bandwidths suitable for tunable applications.
  • Achieving stable single-frequency operation in such lasers can be challenging.

Purpose of the Study:

  • To develop a method for achieving tunable, single-frequency operation in a diode-pumped thulium-doped YAG microchip laser.
  • To investigate the use of an external etalon for mode selection and wavelength tuning.
  • To demonstrate a robust and vibration-insensitive laser system.

Main Methods:

  • Utilized an uncoated external etalon coupled to a diode-pumped thulium-doped YAG microchip laser.
  • Employed translation of the etalon to tune the laser's output wavelength.

Related Experiment Videos

  • Analyzed the wavelength-dependent reflection feedback mechanism responsible for single-frequency oscillation.

    • Main Results:

    • Successfully forced the microchip laser into single-frequency mode operation.
    • Achieved a tunable wavelength range of 15 nm by translating the etalon.
    • Obtained output powers of 45 mW in a monolithic, vibration-insensitive configuration.

    Conclusions:

    • The external etalon feedback method effectively enables tunable, single-frequency operation.
    • This technique combines the stability of microchip lasers with the broad tuning capabilities of the laser material.
    • The developed system is suitable for applications requiring stable, tunable, single-frequency laser sources.