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Proceedings Paper

Improving the beam quality of copper vapor lasers using stimulated brillouin scattering phase conjugation
Author(s): Michael A. O'Key; Michael R. Osborne; C. R. Dutton
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Paper Abstract

We report here what is to our knowledge the first demonstration of multikilohertz SBS phase conjugation of copper vapor lasers. SBS reflectivities of 90% have been achieved, discounting the energy lost due to the process transient threshold, and phase conjugation performance has been maintained at 6.5 kHz for several hours. The dependence of the SBS performance on CVL beam quality has been investigated and a significant improvement with improved beam quality is obtained. The ability of the SBS reflection to compensate for CVL aberrations has been demonstrated with a phase conjugate fidelity of 0.97. Results of an investigation into the effects of absorption in the SBS medium have shown that an absorption of approximately 10-3%cm-1 is sufficient to degrade the SBS performance. Medium agitation techniques have been used to partially overcome the effects of absorption, and techniques for further improvement are discussed. Methods of improving the efficiency of the SBS process, including the use of multiple cells to reduce the transient threshold and operation with higher pulse energies are discussed.

Paper Details

Date Published: 16 August 1994
PDF: 10 pages
Proc. SPIE 2206, High-Power Gas and Solid State Lasers, (16 August 1994); doi: 10.1117/12.184636
Show Author Affiliations
Michael A. O'Key, AEA Technology (United Kingdom)
Michael R. Osborne, AEA Technology (United Kingdom)
C. R. Dutton, Urenco Capenhurst Limited (United Kingdom)

Published in SPIE Proceedings Vol. 2206:
High-Power Gas and Solid State Lasers
Markus Bohrer; Tommaso Letardi; Dieter Schuoecker; Horst Weber, Editor(s)

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