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College of Natural Sciences
Department of Physics and Photon Science
1. Journal Articles
Analysis of angular dispersion induced by wavefront rotation in nanosecond optical parametric chirped pulse amplification
- Type
- Article
- Citation
- Optics Express, v.28, no.26, pp.38842 - 38856
- Issued Date
- 2020-12
- Abstract
- Angular dispersion observed in a nanosecond optical parametric chirped-pulse amplification (ns-OPCPA) amplifier adopted in the frontend of a multi-PW laser was analyzed. The theory on the angular dispersion, extended by including the wavefront rotation and the pulse front tilt of a strongly chirped laser pulse, revealed that the wavefront rotation is a major contributor to the angular dispersion, as compared to the pulse front tilt, in a ns-OPCPA amplifier. It was also shown that the wavefront rotation could be introduced by the phase mismatch and the noncollinear propagation angle in the noncollinear ns-OPCPA amplifier. The theoretical prediction was experimentally verified by measuring the angular dispersion of the ns-OPCPA frontend installed in the 20-fs, 4-PW Ti:Sapphire laser. We emphasize the importance of the proper characterization and control of the angular dispersion in the ns-OPCPA amplifier since the focus intensity of an ultrahigh power laser could be significantly reduced due to the spatiotemporal effect even for small induced angular dispersion. © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
- Publisher
- Optical Society of America
- ISSN
- 1094-4087
- Appears in Collections:
- Department of Physics and Photon Science > 1. Journal Articles
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