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Proceedings Paper

Compensation of thermal lensing effect and TEM00-mode generation in cw Nd:YAG lasers
Author(s): Won Kweon Jang; Seong Sook Shin; Sungman Lee
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Paper 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.

Paper Details

Date Published: 3 November 2003
PDF: 8 pages
Proc. SPIE 5175, Laser Beam Shaping IV, (3 November 2003); doi: 10.1117/12.505378
Show Author Affiliations
Won Kweon Jang, Hanseo Univ. (South Korea)
Seong Sook Shin, Hanseo Univ. (South Korea)
Sungman Lee, Korea Atomic Energy Research Institute (South Korea)

Published in SPIE Proceedings Vol. 5175:
Laser Beam Shaping IV
Fred M. Dickey; David L. Shealy, Editor(s)

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