Average Power Effects in Parametric Oscillators and Amplifiers

Thermally induced phase mismatch and thermally induced lensing will limit the average power available from a parametric oscillator or amplifier. Expressions are derived that describe both of these average power effects for the commonly used radial heat extraction as well as for longitudinal heat extraction. It is shown that the effects of thermally induced phase mismatch can be mitigated by a judicious selection of the phase-matching conditions.