Patent ID: 9363582
Filing Date: 2016-06-07
CPC Classification: G02F,G03H,H04J,H04L,H04Q

Claim Text:
1. Optical beam routing apparatus comprising: at least one optical input to receive an input beam; a plurality of optical outputs; a spatial light modulator (SLM) on an optical path between said optical input and said optical outputs; and a driver for said SLM to display a kinoform on said SLM to diffract said input beam into an output beam comprising a plurality of diffraction orders, wherein a routed one of said diffraction orders is directed to at least one selected said optical output; wherein said apparatus comprises a lens or mirror arranged between said SLM and said optical outputs in said optical path, wherein said lens or mirror is configured to modify a wavefront of said output beam by displacing said optical outputs away from a focal plane defined by said lens or mirror to reduce a coupling of said output beam into said selected optical output; and wherein said kinoform is adapted to compensate for said displacement by said lens or mirror to compensate for said reduced coupling and thereby to reduce a coupling of other diffracted light from said input beam into others of said optical outputs than said at least one selected optical output.