Abstract

Diode laser pumped Nd: YAG (yttrium aluminum garnet) lasers can generate a substantial amount of green output with an intracavity nonlinear crystal such as potassium titanyl phosphate (KTP) (Fig. 1). Large irregular fluctuations of the output have very often been observed,¹ which make it difficult to utilize these lasers in applications requiring stability. Oka and Kubota have shown that a quarter wave plate can be used to stabilize the output of a laser with two orthogonally polarized modes.² We have previously analyzed the nonlinear dynamical behavior of the laser model used by Baer.¹ A thorough stability analysis of this model was carried out by Mandel and WuA.⁴,⁵

© 1991 Optical Society of America