Silver-mirror-based multipass preamplifier for a broadband terawatt Ti:sapphire laser.
We have developed a silver-mirror-based multipass preamplifier for a broadband amplification in a terawatt Ti:sapphire laser. With the extremely broad bandwidth of the silver mirrors, a very broad amplified spectrum can be generated at an amplified energy of 4 mJ; the amplified spectral width is 65 nm at half maximum and 160 nm at -25 dB without any spectral shaping technique. Such a broad amplification can be explained well by the simulation that includes gain narrowing and gain saturation. Even after a further amplification to an energy of 600 mJ, the amplified spectrum is broad enough to support an approximately 20 fs transform-limited pulse duration.
Lee
Y W
YW
Quantum Optics Center, Korea Atomic Energy Research Institute, 1045 Daedeok Street Yuseong-gu, Daejon 305-353, Korea. ex-ywlee@kaeri.re.kr
Cha
Y H
YH
Yi
J H
JH
Nam
S M
SM
Lee
K
K
Rhee
Y J
YJ
Jeong
Y U
YU
Cha
H K
HK