Patent ID: 9221074
Filing Date: 2015-12-29
Classification: B05D,G02B,G02F

Abstract:
1. A planar lightwave circuit (PLC), the PLC including: (1) a high-contrast-waveguide region comprising a first waveguide portion that includes a multi-layer core that collectively supports propagation of a light signal having a first mode-field profile, the multi-layer core having; (2) a low-contrast waveguide region comprising a second waveguide portion that includes a single-layer core that collectively supports propagation of a light signal having a second mode-field profile that is larger than the first mode-field profile, the single-layer core comprising the first layer; (3) a spotsize converter that optically couples the first waveguide portion and the second waveguide portion; and (4) a phase shifter disposed on the first waveguide portion, the phase shifter including a first electrode layer, a second electrode layer, and a piezoelectric layer that is between the first electrode layer and the second electrode layer, wherein the phase shifter is operative for inducing stress in the first waveguide portion in response to a control signal.