1. Characterization of Accumulated B-Integral of Regenerative Amplifier Based CPA Systems
- Author
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(0000-0002-1919-8585) Bock, S., (0000-0002-0709-5677) Marie Herrmann, F., (0000-0002-4738-6436) Püschel, T., Helbig, U., Gebhardt, R., Johannes Lötfering, J., (0000-0001-7990-9564) Pausch, R., (0000-0003-3926-409X) Zeil, K., (0000-0002-3727-7017) Ziegler, T., (0000-0002-4626-0049) Irman, A., Oksenhendler, T., Kon, A., (0000-0001-8143-0827) Nishuishi, M., Kiriyama, H., Kondo, K., (0000-0001-7986-3631) Toncian, T., (0000-0003-0390-7671) Schramm, U., (0000-0002-1919-8585) Bock, S., (0000-0002-0709-5677) Marie Herrmann, F., (0000-0002-4738-6436) Püschel, T., Helbig, U., Gebhardt, R., Johannes Lötfering, J., (0000-0001-7990-9564) Pausch, R., (0000-0003-3926-409X) Zeil, K., (0000-0002-3727-7017) Ziegler, T., (0000-0002-4626-0049) Irman, A., Oksenhendler, T., Kon, A., (0000-0001-8143-0827) Nishuishi, M., Kiriyama, H., Kondo, K., (0000-0001-7986-3631) Toncian, T., and (0000-0003-0390-7671) Schramm, U.
- Abstract
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.
- Published
- 2020