High-spatiotemporal-quality petawatt-class laser system.
We have developed a femtosecond high-intensity laser system that combines both Ti:sapphire chirped-pulse amplification (CPA) and optical parametric CPA (OPCPA) techniques and produces more than 30 J broadband output energy, indicating the potential for achieving peak powers in excess of 500 TW. With a cleaned high-energy seeded OPCPA preamplifier as a front end in the system, for the compressed pulse without pumping the final amplifier, we found that the temporal contrast in this system exceeds 10(10) on the subnanosecond time scales, and is near 10(12) on the nanosecond time scale prior to the peak of the main femtosecond pulse. Using diffractive optical elements for beam homogenization of a 100 J level high-energy Nd:glass green pump laser in a Ti:sapphire final amplifier, we have successfully generated broadband high-energy output with a near-perfect top-hat-like intensity distribution.
Kiriyama
Hiromitsu
H
Advanced Photon Research Center , Japan Atomic Energy Agency, 8-1-7 Umemidai, Kizugawa-city, Kyoto, 619-0215, Japan. kiriyama.hiromitsu@jaea.go.jp
Mori
Michiaki
M
Nakai
Yoshiki
Y
Shimomura
Takuya
T
Sasao
Hajime
H
Tanaka
Momoko
M
Ochi
Yoshihiro
Y
Tanoue
Manabu
M
Okada
Hajime
H
Kondo
Shuji
S
Kanazawa
Shuhei
S
Sagisaka
Akito
A
Daito
Izuru
I
Wakai
Daisuke
D
Sasao
Fumitaka
F
Suzuki
Masayuki
M
Kotakai
Hideyuki
H
Kondo
Kiminori
K
Sugiyama
Akira
A
Bulanov
Sergei
S
Bolton
Paul R
PR
Daido
Hiroyuki
H
Kawanishi
Shunichi
S
Collier
John L
JL
Hernandez-Gomez
Cristina
C
Hooker
Chris J
CJ
Ertel
Klaus
K
Kimura
Toyoaki
T
Tajima
Toshiki
T
D000537:Aluminum Oxide / Q000737:chemistry; D000669:Amplifiers, Electronic; D004867:Equipment Design; D007834:Lasers; D055095:Optics and Photonics; D012306:Risk; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013997:Time Factors; D014025:Titanium / Q000737:chemistry
D014025:Titanium; D000537:Aluminum Oxide