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Related Experiment Videos

Highly efficient 1.3-microm second-stokes PbWO4 Raman laser.

Gad M A Gad1, Hans J Eichler, Alexander A Kaminskii

  • 1Optical Institute, Technical University of Berlin, D-10623 Berlin, Germany. gad0432@moebius.physik.tu-berlin.de

Optics Letters
|March 28, 2003
PubMed
Summary

Researchers developed a novel second-Stokes Raman laser using lead tungstate (PbWO4) crystals. This laser, pumped by a Nd:YAG laser, achieved a 30% conversion efficiency and observed new scattering lines.

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Area of Science:

  • Solid-state laser physics
  • Nonlinear optics
  • Materials science

Background:

  • Development of efficient Raman lasers is crucial for various spectroscopic and photonic applications.
  • Lead tungstate (PbWO4) crystals are known for their nonlinear optical properties, making them suitable for Raman scattering.
  • Previous research has explored different crystal lengths and pumping configurations to optimize Raman laser performance.

Purpose of the Study:

  • To develop and characterize a second-Stokes Raman laser utilizing PbWO4.
  • To investigate the conversion efficiency and output characteristics of the developed Raman laser.
  • To explore novel stimulated Raman scattering phenomena within the PbWO4 crystal.

Main Methods:

  • A second-Stokes Raman laser was constructed using a PbWO4 crystal.

Related Experiment Videos

  • The laser was pumped by a pulsed Nd:YAG laser operating at 1.06415 microm.
  • High-reflection mirrors were employed for the Stokes wavelength, and crystal lengths varied from 40-100 mm.

    • Main Results:

    • The developed PbWO4 Raman laser operated at a 1.316-microm wavelength, scattering at a 901 cm(-1) phonon.
    • Maximum output energy reached 0.85 mJ, with conversion efficiency increasing up to 30% for crystal lengths of 40-100 mm.
    • A smooth spatial beam profile and an emission duration of approximately 18 ns were observed. New stimulated Raman scattering lines from a 323 cm(-1) phonon were identified.

    Conclusions:

    • The study successfully demonstrated a high-efficiency second-Stokes Raman laser based on PbWO4.
    • The results indicate that crystal length significantly impacts conversion efficiency in this Raman laser system.
    • The observation of new Raman scattering lines suggests potential for further exploration of nonlinear optical phenomena in PbWO4.