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