Abstract
Rare-gas-halogen excimers are attractive media for the amplification of high-power, ultrashort UV pulses because of their high gain coefficients and their broad spectral bandwidths. These lasers are of particular importance for studies of multiphoton excitation, ionization, and fragmentation processes. Of special interest is the ArF wavelength of 193 nm at the boundary of the vacuum ultraviolet (VUV). In this contribution we report on the determination of the gain characteristics of ArF amplifiers for subpicosecond pulses. By amplifying femtosecond pulses in a double-pass geometry, output energies as high as 10 mj at a pulse duration of approximately 1 ps have been obtained, corresponding to what we believe is the highest peak power generated to date with discharge-pumped ArF amplifiers.
© 1993 Optical Society of America
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