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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 13 — Jun. 30, 2014
  • pp: 15778–15790

Collinear, two-color optical Kerr effect shutter for ultrafast time-resolved imaging

Harsh Purwar, Saïd Idlahcen, Claude Rozé, David Sedarsky, and Jean-Bernard Blaisot  »View Author Affiliations

Optics Express, Vol. 22, Issue 13, pp. 15778-15790 (2014)

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Imaging with ultrashort exposure times is generally achieved with a crossed-beam geometry. In the usual arrangement, an off-axis gating pulse induces birefringence in a medium exhibiting a strong Kerr response (commonly carbon disulfide) which is followed by a polarizer aligned to fully attenuate the on-axis imaging beam. By properly timing the gate pulse, imaging light experiences a polarization change allowing time-dependent transmission through the polarizer to form an ultrashort image. The crossed-beam system is effective in generating short gate times, however, signal transmission through the system is complicated by the crossing angle of the gate and imaging beams. This work presents a robust ultrafast time-gated imaging scheme based on a combination of type-I frequency doubling and a collinear optical arrangement in carbon disulfide. We discuss spatial effects arising from crossed-beam Kerr gating, and examine the imaging spatial resolution and transmission timing affected by collinear activation of the Kerr medium, which eliminates crossing angle spatial effects and produces gate times on the order of 1 ps. In addition, the collinear, two-color system is applied to image structure in an optical fiber and a gasoline fuel spray, in order to demonstrate image formation utilizing ballistic or refracted light, selected on the basis of its transmission time.

© 2014 Optical Society of America

OCIS Codes
(170.6920) Medical optics and biotechnology : Time-resolved imaging
(190.3270) Nonlinear optics : Kerr effect
(280.2490) Remote sensing and sensors : Flow diagnostics
(290.7050) Scattering : Turbid media

ToC Category:
Imaging Systems

Original Manuscript: March 12, 2014
Revised Manuscript: May 6, 2014
Manuscript Accepted: May 13, 2014
Published: June 20, 2014

Virtual Issues
Vol. 9, Iss. 8 Virtual Journal for Biomedical Optics

Harsh Purwar, Saïd Idlahcen, Claude Rozé, David Sedarsky, and Jean-Bernard Blaisot, "Collinear, two-color optical Kerr effect shutter for ultrafast time-resolved imaging," Opt. Express 22, 15778-15790 (2014)

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