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Proceedings Paper

Reduction of crosstalk in a colourless multicasting LCOS-based wavelength selective switch by the application of wavefront encoding
Author(s): 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; D. P. Chu
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Paper Abstract

To optimise the design of a wavelength selective switch based on a phase-only liquid crystal on silicon spatial light modulator and mitigate crosstalk, we propose using a technique referred to as wavefront encoding that involves purposefully building a wavefront error into the optical system. Experimental results taken at 674nm are presented that show wavefront encoding based on defocus can reduce the worst case crosstalk by >10dB compared to a standard Fourier transform set-up. In the case of the WSS we propose using wavefront encoding based on astigmatism.

Paper Details

Date Published: 24 January 2012
PDF: 8 pages
Proc. SPIE 8284, Next-Generation Optical Communication: Components, Sub-Systems, and Systems, 82840S (24 January 2012); doi: 10.1117/12.907281
Show Author Affiliations
Brian Robertson, Univ. of Cambridge (United Kingdom)
Zichen Zhang, Univ. of Cambridge (United Kingdom)
Haining Yang, Univ. of Cambridge (United Kingdom)
Maura M. Redmond, Univ. of Cambridge (United Kingdom)
Neil Collings, Univ. of Cambridge (United Kingdom)
Jinsong Liu, Univ. of Cambridge (United Kingdom)
Ruisheng Lin, Univ. of Cambridge (United Kingdom)
Anna M. Jeziorska-Chapman, Univ. of Cambridge (United Kingdom)
John R. Moore, Univ. of Cambridge (United Kingdom)
William A. Crossland, Univ. of Cambridge (United Kingdom)
D. P. Chu, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 8284:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems
Guifang Li; Dieter Stefan Jäger, Editor(s)

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