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Related Experiment Videos

High average power, all-solid-state external resonator Raman laser.

H M Pask1, S Myers, J A Piper

  • 1Centre for Lasers and Applications, Macquarie University, Sydney, N.S.W. 2109, Australia. hpask@ics.mq.edu.au

Optics Letters
|March 28, 2003
PubMed
Summary
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A diode-pumped Nd:YAG laser generated 1.3-W of 1197 nm light using a barium nitrate (Ba(NO3)2) Raman laser. Slope efficiency reached 63%, but beam quality decreased due to thermal effects.

Area of Science:

  • Laser physics
  • Nonlinear optics
  • Materials science

Background:

  • Diode-pumped solid-state lasers offer efficient light generation.
  • Raman lasers provide wavelength conversion capabilities.
  • Barium nitrate (Ba(NO3)2) is a promising material for Raman conversion.

Purpose of the Study:

  • To investigate the performance of a barium nitrate (Ba(NO3)2) Raman laser pumped by a diode-pumped Nd:YAG laser.
  • To characterize the output power, slope efficiency, and beam quality of the generated Stokes light.
  • To identify factors affecting the laser's performance, such as thermal loading.

Main Methods:

  • Utilized a diode-pumped, Q-switched Nd:YAG laser operating at 1064 nm (3 W average power) as the pump source.
  • Employed an external-resonator configuration with a crystalline Ba(NO3)2 sample.

Related Experiment Videos

  • Measured the output power at the first Stokes wavelength (1197 nm) and assessed beam quality (M2).

    • Main Results:

    • Achieved a maximum output power of 1.3 W at 1197 nm.
    • Observed a high slope efficiency of 63% with respect to incident fundamental power.
    • Noted a degradation in beam quality (M2 increased from ~1.4 to ~3.4) with increasing output power.

    Conclusions:

    • Demonstrated efficient Raman conversion in Ba(NO3)2 using a diode-pumped laser.
    • Identified thermal loading in the Ba(NO3)2 crystal as the primary cause for reduced beam quality at higher powers.
    • Highlighted the potential of Ba(NO3)2 Raman lasers for specific applications, while noting the need to manage thermal effects.