Maximum efficiencies of parametric frequency converters with optically inhomogeneous nonlinear media
Abstract
A method is developed for obtaining steadystate solutions to the contracted equations for nonlinear wave interactions in inhomogeneous media without using an approximation of the prescribed pumping field. The method is applied to analyze the efficiency of optical frequency doublers under conditions of regular or random wavephase mismatch. It is shown that a maximum efficiency of 100% cannot be realized when phases are mismatched. In this case, the efficiency increases initially with increased pumping power, attains some maximum for a crystal of given length, and then decreases with further increases in pumping power. The optimum length of a crystal is calculated as a function of the pumping power at which the doubler's efficiency would be maximum. It is shown that the maximum efficiency for a given crystal of optimum length will increase with increasing pumping power until effects of thermal selfinteraction and diffraction phase mismatch become significant.
 Publication:

Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki
 Pub Date:
 February 1976
 Bibcode:
 1976ZhETF..70..458M
 Keywords:

 Crystal Optics;
 Frequency Multipliers;
 Nonlinear Optics;
 Optical Pumping;
 Parametric Frequency Converters;
 Power Efficiency;
 Inhomogeneity;
 Nonlinear Equations;
 Steady State;
 Wave Interaction;
 Lasers and Masers