학술논문
High-spatiotemporal-quality petawatt-class laser system
Document Type
Report
Author abstract
Author abstract
Author
Kiriyama, Hiromitsu; Michiaki, Mori; Nakai, Yoshiki; Shimomura, Takuya; Sasao, Hajime; Tanaka, Momoko; Ochi, Yoshihiro; Tanoue, Manabu; Okada, Hajime; Kondo, Shuji; Kanazawa, Shuhei; Sagisaka, Akito; Daito, Izuru; Wakai, Daisuke; Sasao, Fumitaka; Suzuki, Masayuki; Kotakai, Hideyuki; Kondo, Kiminori; Sugiyama, Akira; Bulanov, Sergei; Bolton, Paul R.; Daido, Hiroyuki; Kawanishi, Shunichi; Collier, John L.; Hernandez-Gomez, Cristina; Hooker, Chris J.; Ertel, Klaus; Kimura, Toyoaki; Tajima, Toshiki
Source
Applied Optics. April 10, 2010, Vol. 49 Issue 11, p2105, 11 p.
Subject
Language
English
ISSN
1559-128X
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.sup.10] on the subnanosecond time scales, and is near [10.sup.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. [c] 2010 Optical Society of America OCIS codes: 320.7090, 190.4970, 170.7160, 140.3280, 230.4480.