title: Use of wavefront encoding in optical interconnects and fiber switches for cross talk mitigation.
abstract: A technique of cross talk mitigation developed for liquid crystal on silicon spatial light modulator based optical interconnects and fiber switches is demonstrated. By purposefully introducing an appropriate aberration into the system, it is possible to reduce the worst-case cross talk by over 10 dB compared to conventional Fourier-transform-based designs. Tests at a wavelength of 674 nm validate this approach, and show that there is no noticeable reduction in diffraction efficiency. A 27% spot increase in beam diameter is observed, which is predicted to reduce at longer datacom and telecom wavelengths.
authors.affiliation: Photonics and Sensors Group, Department of Engineering, University of Cambridge, UK. br249@cam.ac.uk
authors.forename: Brian
authors.initials: B
authors.lastname: Robertson
authors.forename: Zichen
authors.initials: Z
authors.lastname: Zhang
authors.forename: Maura M
authors.initials: MM
authors.lastname: Redmond
authors.forename: Neil
authors.initials: N
authors.lastname: Collings
authors.forename: Jinsong
authors.initials: J
authors.lastname: Liu
authors.forename: R S
authors.initials: RS
authors.lastname: Lin
authors.forename: Anna M
authors.initials: AM
authors.lastname: Jeziorska-Chapman
authors.forename: John R
authors.initials: JR
authors.lastname: Moore
authors.forename: William A
authors.initials: WA
authors.lastname: Crossland
authors.forename: D P
authors.initials: DP
authors.lastname: Chu