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Applied Optics

Applied Optics


  • Vol. 42, Iss. 10 — Apr. 1, 2003
  • pp: 1852–1855

Effect of ultrashort pulsed illumination on foci caused by a Fresnel zone plate

Ross Ashman and Min Gu  »View Author Affiliations

Applied Optics, Vol. 42, Issue 10, pp. 1852-1855 (2003)

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The focal distribution produced by a zone plate under ultrashort pulsed laser illumination is investigated under the Fresnel approximation. A comparison of the diffraction patterns in the focal region between pulsed and continuous-wave illumination shows that the focal shape produced by a zone plate can be significantly altered when an ultrashort pulse is shorter than 100 fs. In particular, the focal width in the axial and the transverse directions is increased by approximately 5% and 85%, respectively, from continuous-wave illumination to 10-fs pulsed illumination.

© 2003 Optical Society of America

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(320.0320) Ultrafast optics : Ultrafast optics

Original Manuscript: July 21, 2002
Revised Manuscript: December 2, 2002
Published: April 1, 2003

Ross Ashman and Min Gu, "Effect of ultrashort pulsed illumination on foci caused by a Fresnel zone plate," Appl. Opt. 42, 1852-1855 (2003)

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