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Proceedings Paper

Measuring spatio-temporal pulse distortions using GRENOULLE
Author(s): Selcuk Akturk; Xun Gu; Mark Kimmel; Ziyang Wang; Rick Trebino
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Paper Abstract

We show that GRENOUILLE, the experimentally simple version of frequency-resolved optical gating (FROG) can measure the two spatio-temporal distortions, namely spatial chirp and pulse-front tilt, in addition to the pulse intensity and phase. This is done without a single alteration in the experimental setup. Specifically, pulse-front tilt yields a displacement of the otherwise centered trace along the delay axis while spatial chirp causes a shear to the otherwise symmetrical GRENOUILLE trace. We develop a more general FROG pulse-retrieval algorithm based on the Levenberg-Marquardt algorithm, which can retrieve not only the pulse intensity and phase but also both the spatial chirp and pulse-front tilt from GRENOUILLE traces. Lastly, we also show that, by employing the exotic nonlinear crystal Proustite, GRENOUILLE can be extended to measure fiber-laser pulses with wavelengths near 1.5μm. The high nonlinearity of Proustite compensates for the lower output power of fiber lasers. Also Proustite has so high dispersion that it can spectrally resolve these relatively narrowband pulses. We experimentally test all of these innovations and obtain perfect agreement with the expected results.

Paper Details

Date Published: 21 March 2005
PDF: 14 pages
Proc. SPIE 5714, Commercial and Biomedical Applications of Ultrafast Lasers V, (21 March 2005); doi: 10.1117/12.589242
Show Author Affiliations
Selcuk Akturk, Georgia Institute of Technology (United States)
Xun Gu, Georgia Institute of Technology (United States)
Mark Kimmel, Georgia Institute of Technology (United States)
Ziyang Wang, Georgia Institute of Technology (United States)
Rick Trebino, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5714:
Commercial and Biomedical Applications of Ultrafast Lasers V
Joseph Neev; Christopher B. Schaffer; Andreas Ostendorf; Stefan Nolte, Editor(s)

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