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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 7, Iss. 10 — Nov. 6, 2000
  • pp: 342–349

Increased-bandwidth in ultrashort-pulse measurement using an angle-dithered nonlinear-optical crystal

Patrick O’Shea, Mark Kimmel, Xun Gu, and Rick Trebino  »View Author Affiliations

Optics Express, Vol. 7, Issue 10, pp. 342-349 (2000)

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We show that the usual phase-matching-bandwidth constraint in ultrashort-laser-pulse measurement techniques is overly restrictive. Specifically, the phase-matching bandwidth need not exceed the pulse bandwidth on every pulse. Instead, only the phase-matching bandwidth integrated over the measurement period need exceed the pulse bandwidth. We show that angle-dithering a second-harmonic-generation crystal that is otherwise too narrowband (that is, too thick) can yield sufficient phase-matching bandwidth and an accurate pulse measurement. We apply this technique to frequency-resolved optical gating (FROG) and show that accurate pulse measurements can be made using a comparatively very thick and hence narrowband crystal. An additional advantage of using a thick crystal is increased signal strength.

© Optical Society of America

OCIS Codes
(320.7080) Ultrafast optics : Ultrafast devices
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Research Papers

Original Manuscript: September 26, 2000
Published: November 6, 2000

Patrick O'Shea, Mark Kimmel, Xun Gu, and Rick Trebino, "Increased-bandwidth in ultrashort-pulse measurement using an angle-dithered nonlinear-optical crystal," Opt. Express 7, 342-349 (2000)

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