Asymmetric whispering gallery mode resonator

A lidar sensor system, comprising:

• a laser;
• an optical coupler that is coupled to the laser;
• and
• an asymmetric whispering gallery mode resonator device that is coupled to the optical coupler, the asymmetric whispering gallery mode resonator device comprising a resonator disk formed of an electrooptic material, the resonator disk comprising:
• an axial surface along a perimeter of the resonator disk, the axial surface being polished;
• a top surface;
• a bottom surface substantially parallel to the top surface;
• a first chamfered edge between the top surface and the axial surface, the first chamfered edge being unpolished;
• and
• a second chamfered edge between the bottom surface and the axial surface, the second chamfered edge being unpolished;
• wherein the axial surface, the first chamfered edge, and the second chamfered edge form a convex side structure of the asymmetric whispering gallery mode resonator disk.

A method of manufacturing an asymmetric whispering gallery mode resonator device, comprising:

• providing a first electrode layer on an electrooptic material layer;
• providing a second electrode layer on the electrooptic material layer, wherein the first electrode layer and the second electrode layer are on opposite sides of the electrooptic material layer;
• forming the asymmetric whispering gallery mode resonator device having a convex side structure from the first electrode layer, the electrooptic material layer, and the second electrode layer, wherein a resonator disk is formed in the electrooptic material layer, the resonator disk comprising:
• an axial surface along a perimeter of the resonator disk;
• a top surface;
• a bottom surface substantially parallel to the top surface;
• a first chamfered edge between the top surface and the axial surface, the first chamfered edge having a first width between the top surface and the axial surface;
• and
• a second chamfered edge between the bottom surface and the axial surface, the second chamfered edge having a second width between the bottom surface and the axial surface, wherein the second width of the second chamfered edge differs from the first width of the first chamfered edge;
• wherein the axial surface, the first chamfered edge, and the second chamfered edge form the convex side structure;
• and
• polishing at least a portion of the convex side structure of the asymmetric whispering gallery mode resonator device.