Tunable VUV radiation generated by two-photon resonant frequency mixing in xenon

Abstract

Efficient two-photon resonant frequency conversion of powerful pulsed dye laser radiation generates in Xe intense VUV light at <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\omega_{VUV} = 2\omega_{UV} - \omega_{D}</tex> . The frequency ω <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">UV</inf> is tuned to the 5p-6p [ <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\frac{5}{2},2</tex> ] two-photon resonance ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\lambda_{UV} = 255.9</tex> nm). For dye laser radiation ω <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">D</inf> at <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\lambda_{D} = 300-760</tex> nm ω <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">VUV</inf> is tunable in the spectral range of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\lambda_{VUV} = 155-220</tex> nm. The resonantly enhanced conversion efficiency is typically 0.05-0.2 percent; the generated VUV pulse power <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P_{VUV} = 0.5-1</tex> kW. The experimental results provide detailed information on conversion limiting saturation phenomena and their dependence on the input power and the detuning of ω <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">UV</inf> from the two-photon resonance.