We propose a picosecond single-beam open Z-scan experiment in which the usual apertured detection scheme is replaced by a two-dimensional single-shot CCD camera. This enables us to extract the two-dimensional transverse modifications of the whole far-field pattern that are due to nonlinear refraction as well as to measure the induced nonlinear phase shift with increased sensitivity compared with that of the conventional Z scan.
© 1996 Optical Society of America
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