title: High-energy, narrow-bandwidth periodically poled Mg-doped LiNbO3 optical parametric oscillator with a volume Bragg grating.
abstract: We have demonstrated a simple, high-energy, narrow spectral bandwidth optical parametric oscillator (OPO) by use of a large aperture periodically poled Mg-doped LiNbO(3) device with a volume Bragg grating (VBG). A free-running degenerate OPO pumped by a Q-switched 1.064 microm Nd:YAG laser exhibits maximum output pulse energy of 110 mJ with high slope efficiency of 75% around room temperature. Broad spectral bandwidth (Dlambda~100 nm) around the degeneracy wavelength was suppressed by using a VBG as an output coupler. Up to 61 mJ of the output pulse energy with narrowed spectral bandwidth of less than 1.4 nm was obtained at the degeneracy wavelength of 2.128 microm.
authors.affiliation: Chemical Spectroscopy Division, Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-15, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan. saikawa@ims.ac.jp
authors.forename: Jiro
authors.initials: J
authors.lastname: Saikawa
authors.forename: Masaaki
authors.initials: M
authors.lastname: Fujii
authors.forename: Hideki
authors.initials: H
authors.lastname: Ishizuki
authors.forename: Takunori
authors.initials: T
authors.lastname: Taira