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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 10 — May. 7, 2012
  • pp: 10807–10815

Generation of high-contrast, 30 fs, 1.5 PW laser pulses from chirped-pulse amplification Ti:sapphire laser

Tae Jun Yu, Seong Ku Lee, Jae Hee Sung, Jin Woo Yoon, Tae Moon Jeong, and Jongmin Lee  »View Author Affiliations

Optics Express, Vol. 20, Issue 10, pp. 10807-10815 (2012)

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High-contrast, 30 fs, 1.5 PW laser pulses are generated from a chirped-pulse amplification (CPA) Ti:sapphire laser system at 0.1 Hz repetition rate. The maximum output energy of 60.2 J is obtained, at a pump energy of 120 J, from a booster amplifier that is pumped by four frenquency-doubled Nd:glass laser systems. During amplification, parasitic lasing is suppressed by index matching fluid with absorption dye and the careful manipulation of the time delay between the seed and pump pulses. An amplified pulse passes through a pulse compressor consisting of four gold-coated gratings. After compression, the measured pulse duration is 30 fs, and the output energy is 44.5 J, yielding a peak power of about 1.5 PW. The output energy of 44.5 J and output power of 1.5-PW are the highest values ever achieved from the femtosecond CPA Ti:sapphire laser system. To maintain a sufficiently high temporal contrast, a saturable absorber is installed in the front-end system with two ultrafast Pockels cells in order to minimize the amplified spontaneous emission (ASE) and pre-pulse intensity. An adaptive optics system is implemented for PW laser pulses and a focused intensity of about 1 × 1022 W/cm2 can be obtained when an f/3 optic is used.

© 2012 OSA

OCIS Codes
(140.3280) Lasers and laser optics : Laser amplifiers
(320.5520) Ultrafast optics : Pulse compression
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:
Lasers and Laser Optics

Original Manuscript: February 15, 2012
Revised Manuscript: April 12, 2012
Manuscript Accepted: April 15, 2012
Published: April 25, 2012

Virtual Issues
Vol. 7, Iss. 7 Virtual Journal for Biomedical Optics

Tae Jun Yu, Seong Ku Lee, Jae Hee Sung, Jin Woo Yoon, Tae Moon Jeong, and Jongmin Lee, "Generation of high-contrast, 30 fs, 1.5 PW laser pulses from chirped-pulse amplification Ti:sapphire laser," Opt. Express 20, 10807-10815 (2012)

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