The model of a beam propagating in a high power laser system is built based on relay imaging. The displacement sensitivity of the lens to beam positioning error is obtained using this model, which is then compared with the traditional method. Two real systems, the pre-amplifier and four-pass amplifier in SGII-U, are presented to further discuss the differences between the two methods. The limitation and application range are summarized in the end. The findings can be used to provide guidance in similar systems.
© 2012 Chinese Optics Letters
(080.3620) Geometric optics : Lens system design
(140.3280) Lasers and laser optics : Laser amplifiers
(220.1140) Optical design and fabrication : Alignment
(140.3425) Lasers and laser optics : Laser stabilization
Lasers and Laser Optics
Jia Xu, Jianqiang Zhu, and Fang Liu, "Beam stability analysis of high power laser system based on relay imaging," Chin. Opt. Lett. 10, 091401-091401 (2012)