High-power fifth-harmonic generation of femtosecond pulses in the vacuum ultraviolet using a Ti:sapphire laser.
We demonstrate the generation of fifth-harmonic pulses at 161 nm, with an energy of up to 600 nJ and 160 fs pulse duration from a Ti:sapphire laser at 1 kHz repetition rate by four-wave difference-frequency mixing in argon-filled waveguides. The efficiency is greatly improved by coupling to higher-order transverse modes, as well as by coating the inner surface of the waveguide. A numerical model of the process yields an understanding of the main effects influencing the harmonic generation.
Tzankov
Pancho
P
Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2A, D-12489 Berlin, Germany. tzankov@mbi-berlin.de
Steinkellner
Oliver
O
Zheng
Jiaan
J
Mero
Mark
M
Freyer
Wolfgang
W
Husakou
Anton
A
Babushkin
Ihar
I
Herrmann
Joachim
J
Noack
Frank
F