Directly diode-pumped millijoule subpicosecond Yb:glass regenerative amplifier.
An Yb:glass regenerative amplifier directly side pumped by four 20-W diodes is demonstrated. By use of a novel pumping scheme and introduction of cylindrical optics into the cavity, a free-running average output power as great as 4 W with a TEM(00) -like mode was achieved from the bare cavity, with a 0.56 pump duty cycle. When the regenerative amplifier injected, 1-mJ 200-fs FWHM pulses were obtained following compression by use of 2-ms pump pulses and up to a 150-Hz repetition rate.
Liu
H
H
Biswal
S
S
Paye
J
J
Nees
J
J
Mourou
G
G
Hönninger
C
C
Keller
U
U