We present a new apparatus making possible both homogeneity and multipass pumping. It is made up of a square section kaleidoscope made of transparent medium on the terminal faces of which are set mirrors with transparent holes at the centers. The kaleidoscope homogenizes the beam. The pump power reflected by the amplifier medium returns in the kaleidoscope, and the mirrors reflect this pump light toward the amplifier medium.
© 2007 Optical Society of America
Lasers and Laser Optics
Original Manuscript: May 29, 2007
Revised Manuscript: August 24, 2007
Manuscript Accepted: August 25, 2007
Published: October 4, 2007
Eric Bartnicki, Gilbert L. Bourdet, and Michel Ynard, "Homogenizer and multipass pump beam combination for quasi-longitudinally diode-pumped solid-state lasers," Appl. Opt. 46, 7190-7195 (2007)