Waveguide-grating-based wavelength-intelligent devices

Abstract

Electrically activated, wavelength-selective optical switches, a tunable wavelength selector, and a wavelength-tunable light modulator. In one preferred embodiment, an electrically activated, wavelength-selective optical switch comprises on a common substrate a first waveguide, a second waveguide comprising an electro-optic material, a set of Bragg gratings, and a means for generating an electrical field across the second waveguide. When the electrical field is applied, the refractive index of the electro-optic material and the Bragg phase-matching condition of the Bragg gratings are changed, causing one of the multiplexed input optical signals in the first waveguide to be guided by mode coupling into the second waveguide.

Dependencies are inferred from the claim text.