Single-mode visible and mid-infrared periodically poled lithium niobate optical parametric oscillator amplified in perylene red doped poly(methyl methacrylate)

We have demonstrated a simple grazing-incidence optical parametric oscillat or (OPO) based on periodically poled lithium niobate (PPLN) capable of gene rating single-mode visible (619-640 nm) and infrared (3.16-3.77 mu m) radia tion. The single-mode (<400 MHz bandwidth) signal output energy of the OPO was limited to 10 mu J due to residual idler reflections supporting a monol ithic OPO within the PPLN crystal. A perylene red doped poly(methyl methacr ylate) disc was used to amplify the signal wavelength up to 114 mu J in a s ingle pass without broadening the optical bandwidth. (C) 2000 Elsevier Scie nce B.V. All rights reserved.