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Electro-optic measurement of terahertz pulse energy distribution

Sun, J.H. and Gallacher, J.G. and Brussard, G.J.H and Lemos, N. and Jaroszynski, D.A. and Huang, Z.X. (2009) Electro-optic measurement of terahertz pulse energy distribution. Review of Scientific Instruments, 80 (11). ISSN 0034-6748

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Abstract

An accurate and direct measurement of the energy distribution, of a low repetition rate terahertz electromagnetic pulse is challenging because of the lack of sensitive detectors in this spectral range. In this paper, we show how the total energy and energy density distribution of a terahertz electromagnetic pulse can be determined by directly measuring the absolute electric field amplitude and beam energy density distribution using electro-optic detection. This method has potential use as a routine method of measuring the energy density of terahertz pulses that could be applied to evaluating future high power terahertz sources, terahertz imaging, and spatially and temporarily resolved pump-probe experiments. (C) 2009 American Institute of Physics. [doi:10.1063/1.3245342]