Efficient high-energy femtosecond pulse compression in quadratic media with flattop beams.
Using a Gaussian-to-flattop beam reshaper and a frequency-doubling crystal, we demonstrate highly efficient and spatially uniform pulse compression of 1mJ, ~100fs pulses from a regenerative Ti:sapphire amplifier. The technique has general applicability to all-bulk self-defocusing-type cascaded-quadratic compressors, providing a way to increase peak power and intensity for a wide range of amplified femtosecond pulsed lasers.
Moses
Jeffrey
J
Department of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA. j_moses@mit.edu
Alhammali
Eihab
E
Eichenholz
Jason M
JM
Wise
Frank W
FW