Patent ID: 6128424
Filing Date: 2000-10-03
Classification: G02F

Abstract:
An Integrated Optics Chip comprising:an optics chip having a top surface, a +Z face and a -Z face, the chip being formed from a crystal having a high electro-optic coefficient and conventional X, Y and Z crystal axes, and wherein, the orientation of the +Z axis and -Z axis are substantially orthogonal to the input waveguide, the Z axis being that axis across which a pyroelectric effect is exhibited;at least one input waveguide coupled to receive an optical signal from an input port, and to couple that signal to a waveguide network,at least a first and a second conductive rail, the rails being formed on the top surface of the optic chip, the first and second rails being positioned to straddle a portion of the input waveguide, each rail having;a respective tapered input segment having an input end and an output end,a respective parallel segment having an input end and an output end, the parallel segments of the respective first and second rails being positioned to be parallel to and to closely straddle a portion of the input waveguide,each respective tapered input segment having an input end proximate the input port and distanced from the input waveguide, the extent of the tapered input segment being formed and positioned on the surface of the optics chip to adiabatically approach the input waveguide as the respective output end of the tapered input segment homogeneously merges with the input end of the corresponding parallel segment;a conductive bridge connects the first and second rails to form a conductive network and to prevent a charge differential from developing between the first and second rails.