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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 6 — Jun. 1, 2008
  • pp: A70–A80

Simulations of frequency-resolved optical gating for measuring very complex pulses

Lina Xu, Erik Zeek, and Rick Trebino  »View Author Affiliations


JOSA B, Vol. 25, Issue 6, pp. A70-A80 (2008)
http://dx.doi.org/10.1364/JOSAB.25.000A70


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Abstract

Frequency-resolved optical gating (FROG) and its variations are the only techniques available for measuring complex pulses without a well-characterized reference pulse. We study the performance of the FROG generalized-projections algorithm for retrieving the intensity and phase of very complex ultrashort laser pulses [with time–bandwidth products (TBPs) of up to 100] in the presence of noise. We compare the performance of three versions of FROG: second-harmonic-generation (SHG) FROG, polarization-gate (PG) FROG, and cross-correlation FROG (XFROG), the last of which requires a well-characterized reference pulse. We found that the XFROG algorithm converged in all cases on the first initial guess. The PG FROG algorithm converged for all moderately complex pulses, for 99% of the pulses we tried, and for more than 95% of even the most complex pulses ( TBP 100 ) . The SHG FROG algorithm converged for 95% of the pulses we tried and for over 80% of even the most complex pulses. We found no additional ambiguities in any of these techniques.

© 2008 Optical Society of America

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Measurement of Ultrashort Electromagnetic Pulses

History
Original Manuscript: November 16, 2007
Revised Manuscript: February 20, 2008
Manuscript Accepted: February 24, 2008
Published: May 6, 2008

Citation
Lina Xu, Erik Zeek, and Rick Trebino, "Simulations of frequency-resolved optical gating for measuring very complex pulses," J. Opt. Soc. Am. B 25, A70-A80 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-6-A70

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