Efficient phase-matched third harmonic light generation in hexafluoroisopropanol solutions of a pyrimidonecarbocyanine dye |
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Authors: | W Leupacher A Penzkofer B Runde K H Drexhage |
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Institution: | (1) Naturwissenschaftliche Fakultät II-Physik, Universität, D-8400 Regensburg, Fed. Rep. Germany;(2) Physikalisch-Chemisches Institut, Universität, D-5900 Siegen, Fed. Rep. Germany |
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Abstract: | The phase-matched collinear third harmonic generation of picosecond laser pulses in a 0.0825 molar hexafluoroisopropanol solution of a pyrimidonecarbocyanine dye is studied. The fundamental pulses are generated in a passively mode-locked Nd-phosphate glass laser. The saturation of third harmonic generation at high intensities is investigated. The influences of two-photon absorption, excited-state absorption, and amplified spontaneous emission are discussed. For input peak intensities above 1011 W/cm2 a third harmonic energy conversion of about 2×10–4 is achieved. |
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Keywords: | 42 65C 42 55M 78 20 |
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