Patent ID: 9020306
Filing Date: 2015-04-28
Classification: G02F,Y10T

Abstract:
1. A waveguide device, comprising: a Z-cut lithium niobate substrate having an upper surface and a lower surface; an optical waveguide embedded within the lithium niobate substrate; a signal electrode disposed on the upper surface of the lithium niobate substrate and parallel to the optical waveguide; first and second guard electrodes disposed on the upper surface of the lithium niobate substrate and flanking the signal electrode and respectively spaced apart from the signal electrode by first and second gaps; and a substantially contiguous conductive layer disposed on the lower surface of the lithium niobate substrate and disposed beneath the signal electrode, the first and second guard electrodes, and the first and second gaps and configured to provide a common ground for the signal electrode and the first and second guard electrodes.