14 February 2007 Beam-quality enhancement in multi-kW rod-based lasers by use of radially polarized light and phase-front correction
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Abstract
We developed a Nd:YAG rod-based MOPA to generate high power in a radially-polarized beam. Two pump-chambers in the amplifier section produced 2.1kW @ M2=9.5, while three pump-chambers yielded 3.1kW @ M2=14. Efficiency in the last pump-chamber was 33%. Several techniques were utilized to enhance beam-quality: an azimuthally-polarized oscillator, special pump-chambers, external compensation of lower-order aberrations, and high-order aberration compensation by pairing pump-chambers.
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Inon Moshe, Inon Moshe, Steven Jackel, Steven Jackel, Avi Meir, Avi Meir, Yaakov Lumer, Yaakov Lumer, Galina Machavariani, Galina Machavariani, Shai Rosenberg, Shai Rosenberg, } "Beam-quality enhancement in multi-kW rod-based lasers by use of radially polarized light and phase-front correction", Proc. SPIE 6452, Laser Resonators and Beam Control IX, 645202 (14 February 2007); doi: 10.1117/12.721038; https://doi.org/10.1117/12.721038
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