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3 November 2003 Compensation of thermal lensing effect and TEM00-mode generation in cw Nd:YAG lasers
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Abstract
The thermally induced birefringence was successfully compensated by placing a quarter-wave plate into a plane parallel Nd:YAG laser resonator of 130 W output power in multi-mode. The optimal conversion efficiency was 38.3% and the slope efficiency was 58.2% with output coupler of 80% reflectance, and the beam quality factor of M2 was 26.7. For higher modes elimination, an aperture of 1.5 mm in diameter was inserted into resonator, and M2 was decreased to 1.8. However, the insertion of quarter-wave plate made an additional improvement to 1.15 of M2 value by alternating their radial and tangential polarization directions every bouncing feedback. We report the experimental results with theoretical analysis for high power solid-state laser fabrication with better beam quality.
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Won Kweon Jang, Seong Sook Shin, and Sungman Lee "Compensation of thermal lensing effect and TEM00-mode generation in cw Nd:YAG lasers", Proc. SPIE 5175, Laser Beam Shaping IV, (3 November 2003); https://doi.org/10.1117/12.505378
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