Abstract
We have developed a vacuum ultraviolet (VUV) spectroscopic system using a laser-produced plasma. Laser-produced rare gas plasma was initiated by a 10 Hz Q-switched YAG laser at the focused intensity of 1011 W/cm2. Among three different rare gas plasma emissions (He, Ne, and Ar), argon plasma was characterized by broad continuum emission with an integrated emission power of 8.4 kW in the VUV spectral region. The pulse width of the VUV emission of 62 ns (Full width at half maximum), which was governed by recombination processes in the plasma, determined the temporal resolution. Using this emission source, we have measured VUV transmission spectra of Nd3+:LaF3 crystal, which was a potential laser medium in the VUV. The transmission peak of the crystal coincided with the reported laser oscillation wavelength at 174 nm. The absorption coefficient at the wavelength was measured to be 0.7 cm-1.
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