High Speed Electro-optic Waveguide Modulation.
DEPARTMENT OF THE NAVY WASHINGTON D C
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An optical waveguide for transmitting light energy is defined by a channel of diffusant in a selected substrate material. An electrical conductor is positioned proximate to each side of the optical waveguide channel and a source of electrical signals is connected to the electrical conductors to develop an electrical field across the optical waveguide, producing resultant changes in refractive index commensurate with the electrical signals impressed upon the parallel electrical conductors. The changes of refractive index cause changes in polarization of light energy transmitted through that portion of the optical waveguide so that such light energy is phase modulated. The present invention provides an electro-optic modulator of extremely small physical size and is suitable for applications in integrated optical circuitry.
- Fiber Optics and Integrated Optics