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Enhancement of THz generation by feedback-optimized wavefront manipulation

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<mark>Journal publication date</mark>24/07/2017
<mark>Journal</mark>Optics Express
Issue number15
Volume25
Number of pages9
Pages (from-to)17271-17279
<mark>State</mark>Published
Early online date11/07/17
<mark>Original language</mark>English

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

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© 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.