Reduction of crosstalk in a colourless multicasting LCOS-based wavelength selective switch by the application of wavefront encoding

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

doi:10.1117/12.907281

24 January 2012 Reduction of crosstalk in a colourless multicasting LCOS-based wavelength selective switch by the application of wavefront encoding

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

Author Affiliations +

Proceedings Volume 8284, Next-Generation Optical Communication: Components, Sub-Systems, and Systems; 82840S (2012) https://doi.org/10.1117/12.907281
Event: SPIE OPTO, 2012, San Francisco, California, United States

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.

Citation Download 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 "Reduction of crosstalk in a colourless multicasting LCOS-based wavelength selective switch by the application of wavefront encoding", Proc. SPIE 8284, Next-Generation Optical Communication: Components, Sub-Systems, and Systems, 82840S (24 January 2012); https://doi.org/10.1117/12.907281

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