Journal
OPTICS COMMUNICATIONS
Volume 333, Issue -, Pages 45-52Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2014.07.054
Keywords
Beam shaping; Spatial light modulator; Laser amplifier; Optical parametric chirped pulse amplification; Nd:glass; High energy laser
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Funding
- Department of Energy National Nuclear Security Administration [DE-NA0001944]
- University of Rochester
- New York State Energy Research and Development Authority
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A programmable liquid crystal beam-shaping system was installed for a 200-mJ optical parametric chirped-pulse amplification (OPCPA) system front end and was applied to dramatically improve the beam uniformity in the subsequent amplifier. A highly nonuniform beam profile caused by gain inhomogeneity in the amplifier was pre-compensated by the beam shaping system using significantly improved open-loop and closed-loop algorithms. The details of the improved algorithms will be described. The issues of running a liquid crystal device with a high-energy, ultrashort-pulse laser, such as damage risk and temporal contrast degradation, will be addressed. (C) 2014 Elsevier B.V. All rights reserved.
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