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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 51, Iss. 12 — Apr. 20, 2012
  • pp: 2212–2222

Application of the fractional Fourier transform to the design of LCOS based optical interconnects and fiber switches

Brian Robertson, Zichen Zhang, Haining Yang, Maura M. Redmond, Neil Collings, Jinsong Liu, Ruisheng Lin, Anna M. Jeziorska-Chapman, John R. Moore, William A. Crossland, and D. P. Chu  »View Author Affiliations


Applied Optics, Vol. 51, Issue 12, pp. 2212-2222 (2012)
http://dx.doi.org/10.1364/AO.51.002212


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Abstract

It is shown that reflective liquid crystal on silicon (LCOS) spatial light modulator (SLM) based interconnects or fiber switches that use defocus to reduce crosstalk can be evaluated and optimized using a fractional Fourier transform if certain optical symmetry conditions are met. Theoretically the maximum allowable linear hologram phase error compared to a Fourier switch is increased by a factor of six before the target crosstalk for telecom applications of 40dB is exceeded. A Gerchberg–Saxton algorithm incorporating a fractional Fourier transform modified for use with a reflective LCOS SLM is used to optimize multi-casting holograms in a prototype telecom switch. Experiments are in close agreement to predicted performance.

© 2012 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(070.2575) Fourier optics and signal processing : Fractional Fourier transforms
(060.6718) Fiber optics and optical communications : Switching, circuit
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Fourier Optics and Signal Processing

History
Original Manuscript: December 13, 2011
Revised Manuscript: February 3, 2012
Manuscript Accepted: February 6, 2012
Published: April 20, 2012

Citation
Brian Robertson, Zichen Zhang, Haining Yang, Maura M. Redmond, Neil Collings, Jinsong Liu, Ruisheng Lin, Anna M. Jeziorska-Chapman, John R. Moore, William A. Crossland, and D. P. Chu, "Application of the fractional Fourier transform to the design of LCOS based optical interconnects and fiber switches," Appl. Opt. 51, 2212-2222 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-12-2212

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