Describing spatiotemporal couplings in ultrashort pulses using coupling coefficients |
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Authors: | Zeng Shu-Guang Dan You-Quan Zhang Bin Sun Nian-Chun Sui Zhan |
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Affiliation: | College of Electronics Information, Sichuan University, Chengdu 610064, China; College of Science, China Three Gorges University, Yichang 443002, China; Laser Fusion Research Centre of China Academy of Engineering Physics, Mianyang 621900, China |
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Abstract: | Three coupling coefficients are defined to describe spatiotemporal coupling in ultrashort pulses. With these coupling coefficients, the first-order spatiotemporal couplings of Gaussian pulse and beam are described analytically. Also, the first-order and the second-order spatiotemporal couplings caused by angular dispersion elements are studied using these coupling coefficients. It can be shown that these coupling coefficients are dimensionless and normalized, and readily indicate the severity of spatiotemporal coupling. |
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Keywords: | spatiotemporal coupling ultrashort pulse angular dispersion spatial chirp |
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