title: High-spatiotemporal-quality petawatt-class laser system.
abstract: 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.
authors.affiliation: Advanced Photon Research Center , Japan Atomic Energy Agency, 8-1-7 Umemidai, Kizugawa-city, Kyoto, 619-0215, Japan. kiriyama.hiromitsu@jaea.go.jp
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Kiriyama
authors.forename: Michiaki
authors.initials: M
authors.lastname: Mori
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Nakai
authors.forename: Takuya
authors.initials: T
authors.lastname: Shimomura
authors.forename: Hajime
authors.initials: H
authors.lastname: Sasao
authors.forename: Momoko
authors.initials: M
authors.lastname: Tanaka
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ochi
authors.forename: Manabu
authors.initials: M
authors.lastname: Tanoue
authors.forename: Hajime
authors.initials: H
authors.lastname: Okada
authors.forename: Shuji
authors.initials: S
authors.lastname: Kondo
authors.forename: Shuhei
authors.initials: S
authors.lastname: Kanazawa
authors.forename: Akito
authors.initials: A
authors.lastname: Sagisaka
authors.forename: Izuru
authors.initials: I
authors.lastname: Daito
authors.forename: Daisuke
authors.initials: D
authors.lastname: Wakai
authors.forename: Fumitaka
authors.initials: F
authors.lastname: Sasao
authors.forename: Masayuki
authors.initials: M
authors.lastname: Suzuki
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kotakai
authors.forename: Kiminori
authors.initials: K
authors.lastname: Kondo
authors.forename: Akira
authors.initials: A
authors.lastname: Sugiyama
authors.forename: Sergei
authors.initials: S
authors.lastname: Bulanov
authors.forename: Paul R
authors.initials: PR
authors.lastname: Bolton
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Daido
authors.forename: Shunichi
authors.initials: S
authors.lastname: Kawanishi
authors.forename: John L
authors.initials: JL
authors.lastname: Collier
authors.forename: Cristina
authors.initials: C
authors.lastname: Hernandez-Gomez
authors.forename: Chris J
authors.initials: CJ
authors.lastname: Hooker
authors.forename: Klaus
authors.initials: K
authors.lastname: Ertel
authors.forename: Toyoaki
authors.initials: T
authors.lastname: Kimura
authors.forename: Toshiki
authors.initials: T
authors.lastname: Tajima
mesh_terms: 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
chemical_list: D014025:Titanium; D000537:Aluminum Oxide