Enhancement of THz generation by feedback-optimized wavefront manipulation

Hah, J. and Jiang, W. and He, Z-H. and Nees, J. A. and Hou, B. and Thomas, A. G. R. and Krushelnick, K. (2017) Enhancement of THz generation by feedback-optimized wavefront manipulation. Optics Express, 25 (15). pp. 17271-17279. ISSN 1094-4087

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Abstract

We apply active feedback optimization methods to pyroelectric measurements of a THz signal generated by four wave mixing in air using 1 mJ to 12 mJ, 35 fs laser pulses operating at 1/2 kHz repetition rate. A genetic algorithm, using the THz signal as a figure of merit, determines the voltage settings to a deformable mirror and results in up to a 6 fold improvement in the THz signal compared with settings optimized for the best focus. It is possible to optimize for different THz generation processes using this technique. (C) 2017 Optical Society of America

Item Type: Journal Article
Journal or Publication Title: Optics Express
Additional Information: © 2017 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 88520
Deposited By: ep_importer_pure
Deposited On: 24 Nov 2017 13:52
Refereed?: Yes
Published?: Published
Last Modified: 27 Feb 2020 03:59
URI: https://eprints.lancs.ac.uk/id/eprint/88520

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