Improving the beam quality of copper vapor lasers using stimulated brillouin scattering phase conjugation

Michael A. O'Key; Michael R. Osborne; C. R. Dutton

doi:10.1117/12.184636

16 August 1994 Improving the beam quality of copper vapor lasers using stimulated brillouin scattering phase conjugation

Michael A. O'Key, Michael R. Osborne, C. R. Dutton

Author Affiliations +

Proceedings Volume 2206, High-Power Gas and Solid State Lasers; (1994) https://doi.org/10.1117/12.184636
Event: Europto High Power Lasers and Laser Applications V, 1994, Vienna, Austria

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.

Citation Download Citation

Michael A. O'Key, Michael R. Osborne, and C. R. Dutton "Improving the beam quality of copper vapor lasers using stimulated brillouin scattering phase conjugation", Proc. SPIE 2206, High-Power Gas and Solid State Lasers, (16 August 1994); https://doi.org/10.1117/12.184636

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