Enhancement of THz generation by feedback-optimized wavefront manipulation

Hah, J.; Jiang, W.; He, Z-H.; Nees, J. A.; Hou, B.; Thomas, A. G.  R.; Krushelnick, K.

doi:10.1364/OE.25.017271

Title: Enhancement of THz generation by feedback-optimized wavefront manipulation

Journal Article · Tue Jul 11 00:00:00 EDT 2017 · Optics Express

DOI:https://doi.org/10.1364/OE.25.017271· OSTI ID:1463884

Hah, J. ^[1]; Jiang, W. ^[2]; He, Z-H. ^[1]; Nees, J. A. ^[1]; Hou, B. ^[1]; Thomas, A. G. R. ^[1]; Krushelnick, K. ^[1]

Univ. of Michigan, Ann Arbor, MI (United States). Center for Ultrafast Optical Science (CUOS)
Univ. of Electronic Science and Technology of China, Chengdu (China). School of Physical Electronics

Here, 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.

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Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC); US Air Force Office of Scientific Research (AFOSR)

Grant/Contract Number:: SC0008352; FA9550-12-1-0310

OSTI ID:: 1463884

Journal Information:: Optics Express, Vol. 25, Issue 15; ISSN 1094-4087

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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