We describe spatial filters used in a Nd:glass laser with an output pulse energy up to 300 J and a pulse duration of 1 ns. This laser is designed for pumping of a chirped-pulse optical parametric amplifier. We present data required to choose the shape and diameter of a spatial filter lens, taking into account aberrations caused by spherical surfaces. Calculation of the optimal pinhole diameter is presented. Design features of the spatial filters and the procedure of their alignment are discussed in detail.
© 2007 Optical Society of America
Lasers and Laser Optics
Original Manuscript: November 7, 2006
Revised Manuscript: March 31, 2007
Manuscript Accepted: April 2, 2007
Published: June 20, 2007
A. K. Potemkin, T. V. Barmashova, A. V. Kirsanov, M. A. Martyanov, E. A. Khazanov, and A. A. Shaykin, "Spatial filters for high-peak-power multistage laser amplifiers," Appl. Opt. 46, 4423-4430 (2007)