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Article

Characterization of Accumulated B-Integral of Regenerative Amplifier Based CPA Systems

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Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
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Technische Universität Dresden, 01062 Dresden, Germany
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iTeox, 14 avenue Jean Jaurès, 91940 Gometz-le-chatel, France
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Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology, 8-1-7 Umemidai, Kizugawa, Kyoto 610-0215, Japan
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(9), 847; https://doi.org/10.3390/cryst10090847
Received: 31 August 2020 / Revised: 16 September 2020 / Accepted: 17 September 2020 / Published: 22 September 2020
(This article belongs to the Special Issue Development of High Intensity Crystal Laser and Its Applications)
We report on a new approach to measure the accumulated B-integral in the regenerative and multipass amplifier stages of ultrashort-pulse high-power laser systems by B-integral-induced coupling between delayed test post-pulses and the main pulse. A numerical model for such non-linear pulse coupling is presented and compared to data taken at the high-power laser Draco with self-referenced spectral interferometry (SRSI). The dependence of the B-integral accumulated in the regenerative amplifier on its operation mode enables optimization strategies for extracted energy vs. collected B-integral. The technique presented here can, in principle, be applied to characterize any type of ultrashort pulse laser system and is essential for pre-pulse reduction. View Full-Text
Keywords: Petawatt laser; temporal pulse contrast; B-integral; self-referenced spectral interferometry Petawatt laser; temporal pulse contrast; B-integral; self-referenced spectral interferometry
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MDPI and ACS Style

Bock, S.; Herrmann, F.M.; Püschel, T.; Helbig, U.; Gebhardt, R.; Lötfering, J.J.; Pausch, R.; Zeil, K.; Ziegler, T.; Irman, A.; Oksenhendler, T.; Kon, A.; Nishuishi, M.; Kiriyama, H.; Kondo, K.; Toncian, T.; Schramm, U. Characterization of Accumulated B-Integral of Regenerative Amplifier Based CPA Systems. Crystals 2020, 10, 847. https://doi.org/10.3390/cryst10090847

AMA Style

Bock S, Herrmann FM, Püschel T, Helbig U, Gebhardt R, Lötfering JJ, Pausch R, Zeil K, Ziegler T, Irman A, Oksenhendler T, Kon A, Nishuishi M, Kiriyama H, Kondo K, Toncian T, Schramm U. Characterization of Accumulated B-Integral of Regenerative Amplifier Based CPA Systems. Crystals. 2020; 10(9):847. https://doi.org/10.3390/cryst10090847

Chicago/Turabian Style

Bock, Stefan, Franziska M. Herrmann, Thomas Püschel, Uwe Helbig, René Gebhardt, Jakob J. Lötfering, Richard Pausch, Karl Zeil, Tim Ziegler, Arie Irman, Thomas Oksenhendler, Akira Kon, Mamiko Nishuishi, Hiromitsu Kiriyama, Kiminori Kondo, Toma Toncian, and Ulrich Schramm. 2020. "Characterization of Accumulated B-Integral of Regenerative Amplifier Based CPA Systems" Crystals 10, no. 9: 847. https://doi.org/10.3390/cryst10090847

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