A numerical model of a solid-state single-pulse laser with optical parametric generation has been developed that makes it possible to investigate the spatial and energy characteristics of the parametrically generated radiation, taking into account the diffraction effects of the pump radiation and of the signal and idle waves in the cavity of the optical parametric generator (OPG), as well as the interaction with the pump radiation in the volume of the nonlinear crystal of the OPG. Numerical studies of the spatial and energy characteristics of the radiation of an extracavity OPG excited by the radiation of a single-pulse Nd:YVO<sub>4</sub> laser with diode pumping have been carried out. The results of a numerical optimization of the cavity configuration of the OPG that makes it possible to improve the radiance characteristics of the parametrically generated radiation at a wavelength of 1.57μm are presented. The energy characteristics of the parametrically generated radiation are compared for linear and ring structural layouts of the OPG cavities.
© 2008 Optical Society of AmericaPDF Article