Abstract
Recently, the application of two-photon absorption in semiconductor materials for detection of ultrashort laser pulse has received significant attention 1−3 as an approach that is not subject to the phase matching constraints inherent in methods based on nonlinear frequency conversion. One common method of measuring the complex amplitude of a laser pulse is based on generating its sonogram.4−7 Two-photon absorption in semiconductor photo-detectors has been utilized to generate a sonogram employing a multi-shot delay line arrangement.7 In this paper we report a single-shot approach for generating the sonogram of an ultrashort pulse using two-photon absorption in a standard CCD camera.
© 2002 Optical Society of America
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