Sum-Frequency Generation near 194 nm with an External Cavity by Simultaneous Enhancement of Frequency-Stabilized Fundamental Lasers

Abstract
Continuous-wave coherent radiation near 194 nm has been generated by sum-frequency mixing with simultaneous enhancement of both fundamental lasers. An output power of 31 µ W was obtained at 194 nm. The frequency of a Ti: sapphire laser, which was used as one of the fundamental lasers, was stabilized with a frequency fluctuation of 80 kHz rms by using a mode-interference method.