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Opt Lett. 2006 Apr 1;31(7):1008-10.

Simplified spectral phase interferometry for direct electric-field reconstruction by using a thick nonlinear crystal.

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Institute of Optics, University of Rochester, Rochester, New York 14627 and Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK.


We propose and demonstrate a novel implementation of spectral-shearing interferometry (SSI) for reconstructing the electric field of ultrashort pulses by utilizing asymmetric group velocity matching in a long nonlinear crystal. The proposed configuration eliminates the requirement for a linearly chirped auxiliary pulse that is in common in all existing SSI methods, relying on nonlinear conversion to produce a spectral shear.

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