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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 6 — Mar. 15, 2014
  • pp: 1689–1692

Tunable orbital angular momentum mode filter based on optical geometric transformation

Hao Huang, Yongxiong Ren, Guodong Xie, Yan Yan, Yang Yue, Nisar Ahmed, Martin P. J. Lavery, Miles J. Padgett, Sam Dolinar, Moshe Tur, and Alan E. Willner  »View Author Affiliations


Optics Letters, Vol. 39, Issue 6, pp. 1689-1692 (2014)
http://dx.doi.org/10.1364/OL.39.001689


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Abstract

We present a tunable mode filter for spatially multiplexed laser beams carrying orbital angular momentum (OAM). The filter comprises an optical geometric transformation-based OAM mode sorter and a spatial light modulator (SLM). The programmable SLM can selectively control the passing/blocking of each input OAM beam. We experimentally demonstrate tunable filtering of one or multiple OAM modes from four multiplexed input OAM modes with vortex charge of =9, 4, +4, and +9. The measured output power suppression ratio of the propagated modes to the blocked modes exceeds 14.5 dB.

© 2014 Optical Society of America

OCIS Codes
(090.2890) Holography : Holographic optical elements
(120.2440) Instrumentation, measurement, and metrology : Filters
(330.6110) Vision, color, and visual optics : Spatial filtering

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: January 13, 2014
Revised Manuscript: February 14, 2014
Manuscript Accepted: February 15, 2014
Published: March 14, 2014

Citation
Hao Huang, Yongxiong Ren, Guodong Xie, Yan Yan, Yang Yue, Nisar Ahmed, Martin P. J. Lavery, Miles J. Padgett, Sam Dolinar, Moshe Tur, and Alan E. Willner, "Tunable orbital angular momentum mode filter based on optical geometric transformation," Opt. Lett. 39, 1689-1692 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-6-1689


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