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Generation of chirped pulses at high repetition rate with a Ti:sapphire regenerative amplifier

Wang Wen-Yao Wang Li-Chun Feng Wei-Wei Lin Li-Huang Li Ru-Xin

Generation of chirped pulses at high repetition rate with a Ti:sapphire regenerative amplifier

Wang Wen-Yao, Wang Li-Chun, Feng Wei-Wei, Lin Li-Huang, Li Ru-Xin
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  • Received Date:  26 October 2006
  • Accepted Date:  16 November 2006
  • Published Online:  20 July 2007

Generation of chirped pulses at high repetition rate with a Ti:sapphire regenerative amplifier

  • 1. (1)中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海 201800; (2)中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海 201800;中国科学院研究生院,北京 100049

Abstract: We present a method to obtain a laser pulse train at high repetition rate for the Ti:sapphire laser system based on the chirped pulse amplification technique. The conventional working mode of the Pockels cell in the Ti:regenerative amplifier is modified. At a certain dumping time, a portion of the amplified seed pulse is dumped out of the cavity by a certain dumping ration every time the pulse runs around the cavity. Thenceforward, the chirped pulses at high repetition rate are generated. Based on the Franz-Nodvik amplification theory,a theoretical model of the regenerative amplifier is established and the analysis of the dependence of the pulse sequence on the dumping time and dumping ratio is given by numerical computation. With a pumping energy of 35mJ and a dumping ratio of 1/2, a fourteen-pulse sequence at 100MHz with pulse energy of 0.02mJ is obtained at a finite period of time in a pumping cycle.

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