Patent ID: 8873896
Filing Date: 2014-10-28
Classification: G02F,H04B

Abstract:
1. An electro-optical phase modulator comprising: a substrate of electro-optical material; a waveguide formed in the substrate comprising an input for receiving incoming light and an output for outputting data modulated light; a set of at least two electrodes disposed on the substrate for modulating the waveguide; ground lines disposed on the substrate relative to the set of electrodes; each electrode in the set forming a shifting line relative to the waveguide and comprising: at least one electrode of the set having a first interaction length proximate to the input that is shorter than a second interaction length of the same electrode; at any position along the waveguide, at most one interaction length is proximate to the waveguide and adjacent interaction lengths are driven by different electrodes; and each electrode having a modulation strength proportional to the sum of its interaction lengths, whereby a scaling ratio of the modulation strengths is equivalent to the geometric sequence 2