12 May 2015 Active mode control of solid state laser using an intra-cavity beam shaper
Author Affiliations +
Abstract
In high power solid state lasers, thermal lens effect always give rise to the multi-modes oscillation in the resonator. The beam quality will deteriorate with the increase of output power. In this paper, an intra-cavity beam shaper is introduced to actively compensate the thermal lens in the laser resonator. One round trip ABCD matrix of the resonator with an intra-cavity beam shaper and thermal lens is calculated. The design parameters with wide stable zone are concluded through the ABCD matrix. The mode size and stability diagram of the resonator are calculated under different focal length of the thermal lens. The relationship between the adjustment of the intra-cavity beam shaper and the mode size under different thermal lenses are concluded, and general method to actively control the modes contents by adjusting the intra-cavity beam shaper is introduced. The effectiveness and performance of active mode control with the intra-cavity beam shaper are verified by simulations of the output modes of resonators. It shows that the M2 factor is well maintained below 1.6 even the focal length of the thermal lens changes from 5m to 0.5m.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wenguang Liu, Wenguang Liu, Qiong Zhou, Qiong Zhou, Baozhu Yan, Baozhu Yan, Zongfu Jiang, Zongfu Jiang, } "Active mode control of solid state laser using an intra-cavity beam shaper", Proc. SPIE 9513, High-Power, High-Energy, and High-Intensity Laser Technology II, 951310 (12 May 2015); doi: 10.1117/12.2178595; https://doi.org/10.1117/12.2178595
PROCEEDINGS
6 PAGES


SHARE
RELATED CONTENT

Simulation of solid state lasers and amplifiers
Proceedings of SPIE (October 07 2015)
Resonators for high-power lasers
Proceedings of SPIE (December 21 1998)
Novel laser resonator with improved output beam quality
Proceedings of SPIE (August 15 1994)
Novel method to improve the performance of Nd YAG high...
Proceedings of SPIE (April 26 2005)

Back to Top