Line narrowing and tuning of high-power Nd : glass laser using an an intracavity brewster-angle birefringent filter

We discuss the properties of a Brewster-angle briefirngent filter (BBF) using inside a laser cavity for line narrowing and tuning of a high-power low-gain laser, in particular, a Nd : glass laser. The free-spectral range (FSR) and t he dispersion function are found to be strongly angle dependent. This tuning method is found to be extremely simple, rugged, almost lossless, and to have a high finesse.