Abstract: A system and method for making an optical quality silicon surface on optical systems, including integrated optical waveguide device structures, is provided. A rough surface is formed through a dry etching process. Thermal oxide is grown on the surface either by a wet or dry oxidation process. A HF based solution is used to etch the grown oxide, reducing the surface roughness. The process may be performed repeatedly in order to obtain the desired amount of smoothness.

Abstract: Optical filters in, for example, a wavelength division multiplexing (WDM) fiber optic system or an optical waveguide device are utilized and provided. The optical waveguide device comprises a lower substrate layer, an insulating dielectric layer and a waveguide ribs layer. The insulating dielectric layer, having a first refractive index, is positioned above the lower substrate layer. The waveguide ribs layer, having a second different refractive index, is positioned above the dielectric layer. An optical waveguide is formed from the waveguide ribs layer for transmission of light. In the waveguide ribs layer, an optical filter structure formed, wherein the optical filter structure is integrated onto the same substrate as the optical waveguide.

Abstract: A system and method for regenerating an optical signal in a telecommunications network. The regenerator receives a generated multiple wavelength local clock signal and an input optical signal at an optical gating element. The input optical data causes a sampling of the multiple wavelength local clock signal to output optical domain sampled local clock signals on a fiber. A demultiplexer splits the signal into a set of individual wavelength sampled local clock signals and outputs each onto a separate output fiber. The electrical energy of each is measured using an optical tap and an optical to electrical converter and a controller. Based on the highest energy level of the tapped signals, a control signal is created and sent to an optical switch that selects the highest energy optical domain sampled local clock signal and passes it through as the regenerated signal.

Abstract: Optical filters in, for example, a wavelength division multiplexing (WDM) fiber optic system or an optical waveguide device are utilized and provided. The optical waveguide device comprises a lower substrate layer, an insulating dielectric layer and a waveguide ribs layer. The insulating dielectric layer, having a first refractive index, is positioned above the lower substrate layer. The waveguide ribs layer, having a second different refractive index, is positioned above the dielectric layer. An optical waveguide is formed from the waveguide ribs layer for transmission of light. In the waveguide ribs layer, an optical filter structure formed, wherein the optical filter structure is integrated onto the same substrate as the optical waveguide.

Abstract: A system and method for making an optical quality silicon surface on optical systems, including integrated optical waveguide device structures, is provided. A rough surface is formed through a dry etching process. Thermal oxide is grown on the surface either by a wet or dry oxidation process. A HF based solution is used to etch the grown oxide, reducing the surface roughness. The process may be performed repeatedly in order to obtain the desired amount of smoothness.

Abstract: A two dimensional encoded filter for providing wavelength and time shifted output signals is comprised of a photonic integrated device in which the input signal is optically demultiplexed into a plurality of wavelength components, fed back on optically time-delayed feedback paths to a multiplexer which reassembles the signal into a true-time delay wavelength shifted output. The photonic demultiplexer and multiplexer are comprised of a first optical star coupler having a plurality of inputs in which the center input is provided with the input signal. The first star coupler transmits the input signal across a phased array waveguide grating to a second star coupler across which the waveguide components are demultiplexed.