Beam shaping in the high-energy kW-class laser system Bivoj at the HiLASE facility

0579286 - FZÚ 2024 RIV GB eng J - Článek v odborném periodiku
Paliesek, Tomáš - Navrátil, Petr - Pilař, Jan - Divoký, Martin - Smrž, Martin - Mocek, Tomáš
Beam shaping in the high-energy kW-class laser system Bivoj at the HiLASE facility.
High Power Laser Science and Engineering. Roč. 11, Sept (2023), č. článku e79. ISSN 2095-4719. E-ISSN 2052-3289
Institucionální podpora: RVO:68378271
Klíčová slova: beam shaping * high-average-power laser * high-energy laser * liquid crystal on silicon spatial light modulator * wavefront shaping
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 4.8, rok: 2022
Způsob publikování: Open access

A fully automatic fail-safe beam shaping system based on a liquid crystal on a silicon spatial light modulator has been implemented in the high-energy kilowatt-average-power nanosecond laser system Bivoj. The shaping system corrects for gain nonuniformity and wavefront aberrations of the front-end of the system. The beam intensity profile and the wavefront at the output of the front-end were successfully improved by shaping. The beam homogeneity defined by the beam quality parameters was improved two to three times. The root-mean-square value of the wavefront was improved more than 10 times. Consequently, the shaped beam from the second preamplifier led to improvement of the beam profile at the output of the first main cryo-amplifier. The shaping system is also capable of creating nonordinary beam shapes, imprinting cross-references into the beam, or masking certain parts of the beam.
Trvalý link: https://hdl.handle.net/11104/0348139