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

Improved ultrashort pulse-retrieval algorithm for frequency-resolved optical gating

Kenneth W. DeLong and Rick Trebino
J. Opt. Soc. Am. A 11(9) 2429-2437 (1994)

Frequency-resolved optical gating with the use of second-harmonic generation

K. W. DeLong, Rick Trebino, J. Hunter, and W. E. White
J. Opt. Soc. Am. B 11(11) 2206-2215 (1994)

Evolving FROGS:?phase retrieval from frequency-resolved optical gating measurements by use of genetic algorithms

J. W. Nicholson, F. G. Omenetto, D. J. Funk, and A. J. Taylor
Opt. Lett. 24(7) 490-492 (1999)

Ultrashort-pulse measurement using noninstantaneous nonlinearities: Raman effects in frequency-resolved optical gating

Kenneth W. DeLong, Celso L. Ladera, Rick Trebino, Bern Kohler, and Kent R. Wilson
Opt. Lett. 20(5) 486-488 (1995)

Using phase retrieval to measure the intensity and phase of ultrashort pulses: frequency-resolved optical gating

Rick Trebino and Daniel J. Kane
J. Opt. Soc. Am. A 10(5) 1101-1111 (1993)