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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 24 — Nov. 27, 2006
  • pp: 11892–11900

Crossed-beam spectral interferometry: a simple, high-spectral-resolution method for completely characterizing complex ultrashort pulses in real time

Pamela Bowlan, Pablo Gabolde, Aparna Shreenath, Kristan McGresham, Rick Trebino, and Selcuk Akturk  »View Author Affiliations

Optics Express, Vol. 14, Issue 24, pp. 11892-11900 (2006)

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We present a high-spectral-resolution and experimentally simple version of spectral interferometry using optical fibers and crossed beams, which we call SEA TADPOLE. Rather than using collinear unknown and reference pulses separated in time to yield spectral fringes—and reduced spectral resolution—as in current versions, we use time-coincident pulses crossed at a small angle to generate spatial fringes. This allows the extraction of the spectral phase with the full spectrometer resolution, which allows the measurement of much longer and more complex pulses. In fact, SEA TADPOLE achieves spectral super-resolution, yielding the pulse spectrum with even better resolution. Avoiding collinear beams and using fiber coupling also vastly simplify alignment. We demonstrate SEA TADPOLE by measuring a chirped pulse, a double pulse separated by 14 ps, and a complex pulse comprising two trains of pulses with a timebandwidth product of ~400.

© 2006 Optical Society of America

OCIS Codes
(260.3160) Physical optics : Interference
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Ultrafast Optics

Original Manuscript: September 11, 2006
Revised Manuscript: October 23, 2006
Manuscript Accepted: October 30, 2006
Published: November 27, 2006

Pamela Bowlan, Pablo Gabolde, Aparna Shreenath, Kristan McGresham, Rick Trebino, and Selcuk Akturk, "Crossed-beam spectral interferometry: a simple, high-spectral-resolution method for completely characterizing complex ultrashort pulses in real time," Opt. Express 14, 11892-11900 (2006)

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