CUED Publications database

Demonstration of multi-casting in a 1 × 9 LCOS wavelength selective switch

Robertson, B and Yang, H and Redmond, MM and Collings, N and Moore, JR and Liu, J and Jeziorska-Chapman, AM and Pivnenko, M and Lee, S and Wonfor, A and White, IH and Crossland, WA and Chu, DP (2014) Demonstration of multi-casting in a 1 × 9 LCOS wavelength selective switch. Journal of Lightwave Technology, 32. pp. 402-410. ISSN 0733-8724

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Abstract

A multi-functional 1 × 9 wavelength selective switch based on liquid crystal on silicon (LCOS) spatial light modulator technology and anamorphic optics was tested at a channel spacing of 100 and 200 GHz, including dynamic data measurements on both single beam deflection and multi-casting to two ports. The multi-casting holograms were optimized using a modified Gerchberg-Saxton routine to design the core hologram, followed by a simulated annealing routine to reduce crosstalk at non-switched ports. The effect of clamping the magnitude of phase changes between neighboring pixels during optimization was investigated, with experimental results for multi-casting to two ports resulting in a signal insertion loss of-7.6 dB normalized to single port deflection, a uniformity of ±0.6%, and a worst case crosstalk of-19.4 dB, which can all be improved further by using a better anti-reflection coating on the LCOS SLM coverplate and other measures. © 2013 IEEE.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:02
Last Modified: 02 Mar 2021 06:59
DOI: 10.1109/JLT.2013.2293919