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We demonstrate a 120-mW hand-held ultraviolet laser at 0.355 mum by attaching a monolithic wavelength converter at the output end of an optical fiber which is delivering a near-infrared laser light at 1.064 mum.
A novel approach is used to enhance by nearly two orders of magnitude the conversion efficiency of a 125 nm-coherent source, based on four-wave mixing in room-temperature mercury vapor. Saturation issues are observed and discussed.
We demonstrate a significant extension of the high harmonic cutoff by generation in a pre-ionized plasma created with a capillary discharge. In xenon, the cutoff extends from ~ 95 to 140 eV.
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