New Tunable Laser Systems due to Optical Wave Mixing in Nonlinear Crystals

In this paper the second order parametric mixing of KCl crystals containing F
_A
centers is examined using standard perturbation theory. The real and imaginary parts of the nonlinear susceptibility are evaluated over a wide spectral range. Numerical calculations reveal that sum-frequency generation should be feasible with large magnitudes of susceptibilities for several frequency combinations.