Bonn 2000 – scientific programme

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Q: Quantenoptik

Q 46: Erzeugung ultrakurzer Pulse II

Q 46.1: Talk

Friday, April 7, 2000, 11:45–12:15, HS XVI

Generation of high harmonic in hollow core fiber using pulses with different shapes and phases — •P. Zhou¹, A. B. Fedotov², A. M. Zheltikov², A. Atli¹ und D. von der Linde¹ — ¹Institut für Laser- und Plasmaphysik, Universität Essen, 45117 Essen — ²International Laser Center, Faculty of Physics, Moscow State University, 119899 Moscow, Russia

High order harmonic generation of ultrashort laser pulses has become a useful tool for the generation of ultrashort deep UV pulses. We have used a very simple hollow fiber scheme and obtained efficient harmonic generation with pulses of about 70 - 80 fs from a Ti:Sapphire laser system at a repetition rate of 1 kHz. It is important to optimize the gas pressure, fiber length and pulse parameter in order to get efficient harmonic generation. We have studied the spectral changes both of the fundamental and different harmonics after the fiber. We will discuss the harmonic generation using pulses with different shapes and phases.