Sum Frequency Generation of 254 nm Light and Its Application as a Diagnostic for Supersonic Vapor Streams

摘要

We describe a technique for generating a narrow linewidth, tuneable, continuous wave, ultraviolet diagnostic beam. The technique utilizes a sum frequency generation technique in which 657 nm and 413 nm light is combined in KDP to generate up to 0.1 mW of uv light. Results of the use of this diagnostic beam to determine vapor properties of a supersonic stream of mercy vapor will be presented. We will also describe the general technique for generation of other wavelengths from 236 to 274 nm. (ERA citation 12:012003)