Stability of an intracavity frequency-doubled Nd:YAG laser

Single-mode rate equations are solved in the small-signal limit to determine the oscillation frequency and decay constant for relaxation oscillations in an intracavity frequency-doubled Nd:YAG laser. It is found that improved stability is noted for nonlinear coupling constants greater than 10
^-5
. Eventually, cavity perturbations become critically damped with increased coupling, and oscillatory behavior disappears.