A new cavity for diode side-pumped solid-state lasers was designed, built, and tested. The results were efficient absorption of pumped light in the media and homogeneous pumped-beam distribution under various pump-power levels, which generated Nd:YAG active media of different radii and concentrations and shifts of the diode wavelength. Full-multimode quasi-continuous pump operation with a slope efficiency of 40.5% was obtained from a plane–plane resonator equipped with two Nd:YAG rods. At a maximum average pump power of 1.33 kW, the optical-to-optical efficiency was 31.4%. Single-transverse-mode operation (M2 factor of less than 1.1) of 163 W was demonstrated.
© 2000 Optical Society of America
Original Manuscript: August 17, 1999
Revised Manuscript: December 2, 1999
Published: February 20, 2000
Nicolaie Pavel, Yoshihito Hirano, Syuhei Yamamoto, Yasuharu Koyata, and Toru Tajime, "Improved pump-beam distribution in a diode side-pumped solid-state laser with a highly diffuse, cross-axis beam delivery system," Appl. Opt. 39, 986-992 (2000)