Optical Parametric Oscillator-Based Laser Source Continuously Tunable from 250 to 400 nm

Efficient generation of ultraviolet radiation tunable over the 240-410 nm range has been achieved in a practical, effective system. The signal or idler from an Optical Parametric Oscillator/Amplifier tuning in the 0.7-2.1 μm range is mixed with the second or third harmonic from a Nd:YAG laser to produce approximately 30 mJ of ultraviolet output.