A new paper has been written (MCS Elimination in Multi-degree CDC Grid-less ROADMs using 2D Beam steered Stacked WSS)
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Use of wavefront encoding in optical interconnects and fiber switches for cross talk mitigation, B. Robertson et al (published in Appl. Optics, vol 51, pp 659-668, 2012)
Demonstration of Multicasting in a 1×9 LCOS Wavelength Selective Switch, B. Robertson et al (published in Journal of Lightwave Technology, vol 32, pp 402-410, 2014)
Small phase pattern 2D beam steering and a single LCOS design of 40 1×12 stacked wavelength selective switches, H. Yang et al (published in Optics Express, vol 24, pp12240-12253)
Stacked wavelength selective switch design for low-cost CDC ROADMs, H. Yang et al (published in OptoElectronics and Communications Conference (OECC) jointly with 2016 International Conference on Photonics in Switching (PS), 2016 21st)