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http://dx.doi.org/10.3938/jkps.73.1637

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)
Publication Information
Journal of the Korean Physical Society / v.73, no.11, 2018 , pp. 1637-1643 More about this Journal
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
Pulse shaping; Pulse distortion; Nd:YAG; Frequency modulation;
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