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1. (WO2018128621) OPTICAL ARRANGEMENT FOR SUPPRESSING OUTERBAND CROSSTALK IN A WAVELENGTH SELECTIVE SWITCH

Pub. No.:    WO/2018/128621    International Application No.:    PCT/US2017/012515
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Sat Jan 07 00:59:59 CET 2017
IPC: G02B 6/35
G02B 26/06
Applicants: NISTICA, INC.
Inventors: ISHIKAWA, Takaaki
Title: OPTICAL ARRANGEMENT FOR SUPPRESSING OUTERBAND CROSSTALK IN A WAVELENGTH SELECTIVE SWITCH
Abstract:
An optical device includes at least three optical ports. Optical arrangement arranges an optical beam received from any of the optical ports into a first polarization state. A dispersion element spatially separates the optical beam into a plurality of wavelength components. An optical power element converges each wavelength component in at least one direction. A programmable optical phase modulator steers the wavelength components through the optical arrangement, the dispersion element and the focusing element to a selected optical output. The programmable optical phase modulator includes an active area that performs the steering and a non-active area surrounding the active area. A polarizing arrangement located in an optical path between at least one of the optical ports and at least a portion of the non-active area of the programmable optical phase modulator is configured to arrange optical energy into a second polarization state orthogonal to the first polarization state.