Noncritical Phase Matching Yields 236-nm Radiation
Sep 1, 2003 — Investigators at Aculight Corp. in Bothell, Wash., have employed noncritical phase matching to obtain 236-nm radiation by twice frequency-doubling a Q-switched, 946-nm Nd:YAG laser. They generated 43 mW of average ultraviolet power inside a cesium lithium borate (CLBO) crystal from 190 mW of blue power, for a second-harmonic conversion efficiency of 22.6 percent.
In general phase matching, called critical phase matching, the momentum vectors of the ordinary, fundamental wave and of the...