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Related Experiment Videos

Midinfrared laser source with high power and beam quality.

Espen Lippert1, Stephane Nicolas, Gunnar Arisholm

  • 1Norwegian Defence Research Establishment, Kjeller, Norway.

Applied Optics
|May 26, 2006
PubMed
Summary

We demonstrate a straightforward method for generating high-power mid-infrared laser output. This technique utilizes a thulium-doped fiber laser to pump a Ho:YAG laser, achieving significant power in the mid-infrared spectrum.

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Nonlinear Optics

Background:

  • Mid-infrared (MIR) light sources are crucial for various applications, including spectroscopy, sensing, and medical treatments.
  • Generating high-power MIR radiation efficiently and with good beam quality remains a challenge.
  • Existing methods often involve complex setups or less efficient conversion processes.

Purpose of the Study:

  • To demonstrate a simple and efficient scheme for generating high-power mid-infrared laser output.
  • To investigate the performance of a cascaded laser system involving a fiber laser, a solid-state laser, and an optical parametric oscillator.
  • To achieve average power exceeding 5 W in the 3-5 micrometer range.

Main Methods:

  • Utilizing a 15 W thulium-doped fiber laser (1907 nm) as the pump source.

Related Experiment Videos

  • Pumping a Q-switched Holmium-doped Yttrium Aluminum Garnet (Ho:YAG) laser to generate 9.8 W at 2096 nm with a 20 kHz repetition rate.
  • Employing the Ho:YAG laser output to pump a doubly resonant zinc germanium phosphide (ZnGeP2) based optical parametric oscillator (OPO).

    • Main Results:

    • Achieved 9.8 W average power from the Ho:YAG laser at 2096 nm with excellent beam quality.
    • Generated 5.1 W average power from the ZnGeP2 OPO in the 3-5 micrometer mid-infrared range.
    • The OPO output exhibited a beam quality factor (M2) of approximately 1.8.

    Conclusions:

    • The demonstrated cascaded laser system provides a simple and effective route to high-power mid-infrared generation.
    • The use of a fiber laser pump source offers advantages in terms of reliability and efficiency.
    • This approach is promising for applications requiring significant power in the 3-5 micrometer spectral region.