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Chirped pulse amplification of femtosecond pulse sequences in a Ti: sapphire laser

Ge Xu-Lei Ma Jing-Long Zheng Yi Lu Xin Jiang Gang Li Yu-Tong Wei Zhi-Yi Zhang Jie

Chirped pulse amplification of femtosecond pulse sequences in a Ti: sapphire laser

Ge Xu-Lei, Ma Jing-Long, Zheng Yi, Lu Xin, Jiang Gang, Li Yu-Tong, Wei Zhi-Yi, Zhang Jie
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  • Received Date:  29 March 2012
  • Accepted Date:  16 May 2012
  • Published Online:  05 November 2012

Chirped pulse amplification of femtosecond pulse sequences in a Ti: sapphire laser

  • 1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
  • 2. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
  • 3. Key Laboratory for Laser Plasmas of Ministry of Education, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 10974250, 60978031).

Abstract: An amplified femtosecond pulse sequence is generated in a multi-TW Ti: sapphire chirped pulse amplification system (JG-II facility). The pulse interval of the pulse sequence is 14.8 ns, corresponding to a frequency of 67.5 MHz. The compressed pulse sequence can reach 122 mJ in 19 independent pulses with a pulse width of about 60 fs. The energy of the pulses declines from 20 mJ to 0.5 mJ, corresponding to a peak power from 1011 W to 1010 W. The pulse sequence has important applications in lengthening the lifetime of the laser produced plasma channel in air and in microfabrication.

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