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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 1140–1144

Real-time inversion of polarization gate frequency-resolved optical gating spectrograms

Daniel J. Kane, Jeremy Weston, and Kai-Chien J. Chu  »View Author Affiliations


Applied Optics, Vol. 42, Issue 6, pp. 1140-1144 (2003)
http://dx.doi.org/10.1364/AO.42.001140


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Abstract

Frequency-resolved optical gating (FROG) is a technique used to measure the intensity and phase of ultrashort laser pulses through the optical construction of a spectrogram of the pulse. To obtain quantitative information about the pulse from its spectrogram, an iterative two-dimensional phase-retrieval algorithm must be used. Current algorithms are quite robust, but retrieval of all the pulse information can be slow. Previous real-time FROG trace inversion work focused on second-harmonic-generation FROG, which has an ambiguity in the direction of time, and required digital signal processors (DSPs). We develop a simplified real-time FROG device based on a single-shot geometry that no longer requires DSPs. We use it and apply the principal component generalized projections algorithm to invert polarization gate FROG traces at rates as high as 20 Hz.

© 2003 Optical Society of America

OCIS Codes
(320.0320) Ultrafast optics : Ultrafast optics
(320.7100) Ultrafast optics : Ultrafast measurements
(320.7160) Ultrafast optics : Ultrafast technology

History
Original Manuscript: June 13, 2002
Revised Manuscript: October 18, 2002
Published: February 20, 2003

Citation
Daniel J. Kane, Jeremy Weston, and Kai-Chien J. Chu, "Real-time inversion of polarization gate frequency-resolved optical gating spectrograms," Appl. Opt. 42, 1140-1144 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-6-1140


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