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Related Experiment Videos

165-W cryogenically cooled Yb:YAG laser.

Daniel J Ripin1, Juan R Ochoa, R L Aggarwal

  • 1MIT Lincoln Laboratory, 244 Wood Street, Lexington, Massachusetts 02420, USA. dripin@ll.mit.edu

Optics Letters
|October 6, 2004
PubMed
Summary
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Cryogenically cooled Ytterbium-doped Yttrium Aluminum Garnet (Yb:YAG) lasers minimize thermo-optic effects. This enables 165 W of near-diffraction-limited beam generation, crucial for high-power laser applications.

Area of Science:

  • Laser Physics
  • Materials Science

Background:

  • Thermo-optic distortions impede beam quality and power scaling in high-average-power lasers.
  • Managing thermal effects is critical for advancing laser technology.

Purpose of the Study:

  • To investigate the use of cryogenically cooled Yb:YAG for mitigating thermo-optic distortions.
  • To achieve high-power, near-diffraction-limited laser output with minimal thermal aberrations.

Main Methods:

  • Utilized a cryogenically cooled Yb:YAG crystal in a power oscillator configuration.
  • Employed end-pumped diode modules delivering 215 W of incident pump power.

Main Results:

  • Generated 165 W of laser power with a near-diffraction-limited beam (M2 = 1.02).

Related Experiment Videos

  • Achieved negligible thermo-optic effects.
  • Demonstrated high optical-optical efficiency (76%) and slope efficiency (85%).

    • Conclusions:

    • Cryogenic cooling of Yb:YAG effectively suppresses thermo-optic distortions.
    • This approach is highly promising for scalable, high-quality high-power laser systems.