Beam quality improvement of pulsed Nd:YAG lasers using Brillouin phase conjugation

Hans Joachim Eichler; Andreas Haase; S. Hermann; Ralf Menzel; D. Schumann

doi:10.1117/12.143852

22 April 1993 Beam quality improvement of pulsed Nd:YAG lasers using Brillouin phase conjugation

Hans Joachim Eichler, Andreas Haase, S. Hermann, Ralf Menzel, D. Schumann

Proceedings Volume 1834, Laser Energy Distribution Profiles: Measurement and Applications; (1993) https://doi.org/10.1117/12.143852
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

Using phaseconjugating mirrors (PCMs) the beam quality of solid state lasers can be improved by compensating the thermal lens of the rods at high average powers. Oscillators with one PCM as a highly reflecting mirror and double-pass amplifiers with PCMs have been investigated. PCMs are realized by stimulated Brillouin scattering (SBS). Nd:YAG and Nd,Cr:GSGG oscillators have been built with pulse repetition rates up to 45 Hz. Stable TEM₀₀-mode operation has been obtained. Average output powers of 10 watts for 15 ns Q-switched pulses of a Nd:YAG laser and 7 watts for Nd,Cr:GSGG have been achieved. In a double pass Nd:YAG amplifier the thermal lens was compensated leading to a nearly diffraction limited beam with a maximum output power of 40 watts.

Citation Download Citation

Hans Joachim Eichler, Andreas Haase, S. Hermann, Ralf Menzel, and D. Schumann "Beam quality improvement of pulsed Nd:YAG lasers using Brillouin phase conjugation", Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); https://doi.org/10.1117/12.143852

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