An optical system uses a nonlinear optical medium to alter the frequency of a relatively narrow band light source tunable over a plurality of different frequencies using an optical system for passively directing light to the nonlinear medium at a correct phase matching angle. In this manner, the light from the tunable light source can be efficiently frequency-doubled or frequency-tripled without the need of moving parts. An all prism design provides a system of optimal efficiency.
This invention was made with Government support under contract DE-AC04-94AL8500 awarded by the U.S. Department of Energy to Sandia Corporation. Pursuant to the provisions of the contract, the U.S. government has certain rights in the invention.