Patent ID: 9541775
Date: 2017-01-10
CPC Classifications: G02F,H04B

Claim:
1. A method for communication, the method comprising: in an optical modulator comprising first and second optical waveguides and two optical phase shifters, each of the two optical phase shifters comprising a p-n junction with a horizontal section and a vertical section, wherein in each of the two optical phase shifters, a first of a p-doped region and an n-doped region is in a slab waveguide portion and in a rib waveguide portion of the phase shifters and a second of the p-doped region and n-doped region is only in the slab waveguide portion, and wherein in each of the two optical phase shifters, p+ and p++ regions and n+ and n++ regions extend above a top surface of the waveguide portion of the phase shifters such that the p++ and n++ regions are at a same height as a top of the rib waveguide portion: