Corning Incorporated

Laura A Weller-Brophy

Gang Chen

Glenn E Kohnke

William James Miller

Robert Adam Modavis

Joel P Carberry

Peter Knowles

Steven Bruce Dawes

Mike Xu Ouyang

Jaymin Amin

David L Weidman

Darol Chamberlain

Lyle David Kinney

Stephanus J Spammer

Peter J McNeilly

Emmanuel C Onyiriuka

A dynamically tunable filter controls the magnitude of couplings between core and cladding modes of a waveguide by surrounding the waveguide with an overcladding having an adjustable refractive index. The coupled modes are attenuated along the core to produce the desired spectral response. The adjustment to the overcladding index is made in a range that is above the refractive index of the underlying cladding to vary amplitudes of attenuated bands of wavelengths without shifting central wavelengths of the bands.

Amplitude tunable filter

One aspect of the invention is an optical add/drop multiplexer. The optical add/drop multiplexer includes a first optical circulator, the first circulator includes a first port, a second port, and a third port. The optical add/drop multiplexer also includes a first tunable grating coupled to the first port and a second tunable grating coupled to the first grating. The optical add/drop multiplexer further includes a second optical circulator, the second optical circulator includes a fourth port, coupled to the second grating; a fifth port, and a sixth port. Wherein the first tunable grating is a fiber Bragg grating and wherein the second tunable grating is a fiber Bragg grating.

Tunable grating optical device

A wavelength division demultiplexer includes a channel dropping component for receiving optical signals transmitted through a plurality of optical channels, defined by successively different light wavelength bands at intervals ranging between a first channel having the lowest wavelength band to a last channel having the highest wavelength band. The channel dropping component separates at least one channel having a wavelength band intermediate the lowest wavelength band and the highest wavelength band. The demultiplexer further includes an edge filter for separating optical signals received from the channel dropping component that have wavelengths below the intermediate wavelength band from optical signals having wavelengths above the intermediate wavelength band. The separated optical signals are transmitted from the edge filter in two different optical paths. The demultiplexer further includes a channel separator for separating optical signals transmitted in at least one of the optical paths from one another.

Narrow band wavelength division demultiplexer and method of demultiplexing optical signals

The present invention relates to a tunable optical device that includes an optical fiber device having optical properties that vary with temperature and a heater . The heater is thermally coupled to the optical fiber device . The heater includes a metal layer and two electrical contacts that are electrically connected to the metal layer . The electrical contacts are spaced apart from one another along the metal layer . The electrical resistance of the portion of the metal layer between the contacts varies with temperature and serves as a resistive heater. The invention also includes a controller that is electrically connected to the heater . The controller provides electrical power to the heater and measures the electrical voltage across the heater . The controller compares the measured electrical voltage to a pre-selected reference value. The controller then regulates the amount of electrical current supplied to the heater . By regulating the amount of electrical current supplied to the heater the temperature of the heater is controlled.

Thermally tunable optical devices

A wavelength division multiplexer including a channel combining component receiving optical signals transmitted through a plurality of optical channels. The channels are defined by successively different light wavelength bands at intervals ranging between a first channel having the lowest wavelength band to a last channel having the highest wavelength band. The channel combining component combines at least one channel having a wavelength band intermediate the lowest wavelength band and the highest wavelength band with channels having the lowest and the highest wavelength bands. The channel combining component includes an edge filter. This edge filter combines optical signals in the highest and lowest wavelength bands, but not in the intermediate wavelength band. (The highest and said lowest wavelength bands are situated respectively above and below the intermediate wavelength band.) The edge filter provides the combined optical signals to the channel combining component.

Narrow band wavelength division multiplexer and method of multiplexing optical signals

A copper-gallium alloy is deposited on a nonconductive substrate, such as glass, ceramic, or polymeric material, to provide a conductor to which solder will readily adhere, such that electrical contacts to photonic and electrical components can be made. The copper-gallium thin film can also be used to provide a surface for solder sealing a component within a hermetically sealed enclosure. In a preferred embodiment, the copper-gallium alloy was from about 1 to about 40 percent gallium to about 99 to about 60 percent copper and was deposited to a thickness of from about 400 nanometers to about 3 microns. The copper-gallium film is deposited utilizing sputtering or electron beam deposition equipment.

Solderable thin film

Packages for long period fiber gratings and other optical components (and methods for forming the packages) are described. According to an aspect of the invention, a hollow tube surrounding an optical fiber containing a long-period grating is collapsed in two areas, forming a seal at each end of the tube. According to another aspect of the invention, a hollow tube with a shelf section at each end surrounds an optical fiber containing a long-period grating. The hollow tube is sealed at each end with a fused frit. According to another aspect of the invention, a hollow tube surrounding an optical fiber containing a long-period grating is sealed at each end with a glass plug.

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Corning, NY, United States of America

Laura A Weller-Brophy