Origin of Transient Crosstalk and Its Reduction in Phase-only LCOS Wavelength Selective Switches

Author

Yang, Hongming ; Robertson, Brian ; Yu, Daren ; Zhang, Zhenhao ; Chu, D.P.

Author_Institution

Electr. Eng. Div., Univ. of Cambridge, Cambridge, UK

Volume

31

Issue

23

fYear

2013

fDate

Dec.1, 2013

Firstpage

3822

Lastpage

3829

Abstract

The transient crosstalk in a phase-only liquid crystal on silicon (LCOS) based wavelength selective switch using a Fourier transform setup was investigated. Its origin was identified using an in situ test procedure and found to be related to the transient phase patterns displayed by the LCOS device during the switching. Two different methods were proposed to reduce the transient crosstalk without the need to modify the optics or electronics in use. Experimental results show both methods are able to reduce the worst-case transient crosstalk by at least 5 dB.

Keywords

Fourier transform optics; liquid crystal on silicon; optical communication equipment; optical crosstalk; optical switches; Fourier transform setup; liquid crystal on silicon; phase-only LCOS wavelength selective switches; transient crosstalk; transient phase patterns; Crosstalk; Gratings; Liquid crystal on silicon; Optical switches; Transient analysis; Wavelength division multiplexing; Liquid crystal on silicon (LCOS); transient crosstalk; wavelength selective switch;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2013.2288153

Filename

6651664