Journal of the Korean Physical Society

Korean Physical Society (한국물리학회)
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Frequency-Modulated Pulse-Amplification Method for Reducing Pulse Shape Distortion

  • Jeong, Jihoon (Department of Advanced Green Energy and Environment, Handong Global University) ;
  • Cho, Seryeyohan (Department of Advanced Green Energy and Environment, Handong Global University) ;
  • Hwang, Seungjin (Department of Advanced Green Energy and Environment, Handong Global University) ;
  • Yu, Tae Jun (Department of Advanced Green Energy and Environment, Handong Global University)
  • Received : 2018.06.05
  • Accepted : 2018.07.31
  • Published : 2018.11.30
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Abstract

To reduce the laser pulse shape distortion accompanying the amplification process and achieve an intended output pulse shape in the Nd:YAG amplifier chain, we propose a frequency-modulated pulse-amplification method. Assuming carrier-frequency-modulated seed pulses, we numerically simulate the pulse amplification in an Nd:YAG amplifier chain where severe distortion occurs. For the calculation, we develop a modified Frantz-Nodvik equation, which enables two inputs with different carrier frequencies. The simulation results indicate that the temporal contrast of the seed pulse needed to obtain a flat output pulse shape is reduced by 16 - 25 dB when frequency modulation is applied.

Keywords

Acknowledgement

Grant : Development of 125 J.Hz laser system for laser peening

Supported by : Ministry of Trade, Industry & Energy (MI)

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