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Pulse retrieval in frequency-resolved optical gating based on the method of generalized projections

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Abstract

We use the algorithmic method of generalized projections (GP’s) to retrieve the intensity and phase of an ultrashort laser pulse from the experimental trace in frequency-resolved optical gating (FROG). Using simulations, we show that the use of GP’s improves significantly the convergence properties of the algorithm over the basic FROG algorithm. In experimental measurements, the GP-based algorithm achieves significantly lower errors than previous algorithms. The use of GP’s also permits the inclusion of an arbitrary material response function in the FROG problem.

© 1994 Optical Society of America

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