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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 6 — Mar. 15, 2010
  • pp: 889–891

Measurement of the orbital angular momentum spectrum of partially coherent beams

H. Di Lorenzo Pires, J. Woudenberg, and M. P. van Exter  »View Author Affiliations

Optics Letters, Vol. 35, Issue 6, pp. 889-891 (2010)

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In this work we implement a Mach–Zehnder interferometer with an image rotator in one of its arms to measure the orbital angular momentum (OAM) spectrum of a partially coherent beam. By measuring the visibility of the interference as a function of the angle of rotation, the OAM distribution can be recovered via a Fourier transform. Theoretical calculations based on the coherent mode decomposition of the cross-spectral density are in excellent agreement with the experimental data.

© 2010 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(030.4070) Coherence and statistical optics : Modes
(110.4980) Imaging systems : Partial coherence in imaging
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Coherence and Statistical Optics

Original Manuscript: November 23, 2009
Revised Manuscript: February 12, 2010
Manuscript Accepted: February 16, 2010
Published: March 15, 2010

H. Di Lorenzo Pires, J. Woudenberg, and M. P. van Exter, "Measurement of the orbital angular momentum spectrum of partially coherent beams," Opt. Lett. 35, 889-891 (2010)

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