Frequency-Modulated Pulse-Amplification Method for Reducing Pulse Shape Distortion

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...

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Bibliographic Details
Published inJournal of the Korean Physical Society Vol. 73; no. 11; pp. 1637 - 1643
Main Authors Jeong, Jihoon, Cho, Seryeyohan, Hwang, Seungjin, Yu, Tae Jun
Format Journal Article
LanguageEnglish
Published Seoul The Korean Physical Society 01.12.2018
Springer Nature B.V
한국물리학회
Subjects
Amplification
Amplifiers
Carrier frequencies
Chains
Computer simulation
Distortion
Frequency modulation
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Pulse shape
Theoretical
Wideband communications
물리학
Frequency modulation
Pulse distortion
Nd:YAG
Pulse shaping
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Summary: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.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.73.1637