General Electric Company

Sabarni Palit

William Albert Challener

Peter Micah Sandvik

Niloy Choudhury

James Wilson Rose

Ching-Yeu Wei

Glen Peter Koste

Jason Harris Karp

Sergei Ivanovich Dolinsky

Jonathan David Short

Ansas Matthias Kasten

Sachin Narahari Dekate

James Jay McMahon

Stanislav Ivanovich Soloviev

Xingguang Zhu

A solid state photomultiplier includes at least one microcell configured to generate an initial analog signal when exposed to optical photons. The solid state photomultiplier further includes a quench circuit electrically coupled with the at least one microcell. The quench circuit includes at least one quench resistor configured to exhibit a substantially constant temperature coefficient of resistance over a selected temperature range.

Solid state photomultiplier with wide temperature range of operation

A distributed gas detection system includes one or more hollow core fibers disposed in different locations, one or more solid core fibers optically coupled with the one or more hollow core fibers and configured to receive light of one or more wavelengths from a light source, and an interrogator device configured to receive at least some of the light propagating through the one or more solid core fibers and the one or more hollow core fibers. The interrogator device is configured to identify a location of a presence of a gas-of-interest by examining absorption of at least one of the wavelengths of the light at least one of the hollow core fibers.

Distributed gas detection system and method

Microstructured optical fiber (MOF) includes a cladding extending a length between first and second ends. The cladding includes an inner porous microstructure that at least partially surrounds a hollow core. A perimeter contour of the hollow core has a non-uniform radial distance from a center axis of the cladding such that first segments of the cladding along the perimeter contour have a shorter radial distance from the center axis relative to second segments of the cladding along the perimeter contour. The cladding receives and propagates light energy through the hollow core, and the inner porous microstructure substantially confines the light energy within the hollow core. The cladding defines at least one port hole that extends radially from an exterior surface of the cladding to the hollow core. Each port hole penetrates the perimeter contour of the hollow core through one of the second segments of the cladding.

Microstructured optical fibers for gas sensing systems

A pressure sensing cable in one embodiment includes a polarization maintaining (PM) optic fiber having a length; and a Fiber Bragg Grating (FBG) pair formed in the PM optic fiber. The FBG pair includes a first FBG formed at a location along the length of the optic fiber. The first FBG defines a first wavelength range at which the first FBG is reflective. The FBG pair also includes a second FBG spaced a distance from the first FBG to define a FBG cavity extending between the first FBG and the second FBG. The second FBG defines a second wavelength range at which the second FBG is reflective. The first wavelength range of the first FBG and the second wavelength range of the second FBG at least partially overlap.

Systems and methods for distributed pressure sensing

Embodiments of a photodiode array are provided herein. In some embodiments, a photodiode array may include a semiconductor layer configured to convert photons into analog electrical signals; and a passive layer having a first surface and a second surface disposed opposite the first surface, wherein the semiconductor layer is coupled to the first surface, and wherein the passive layer is configured to have a signal receiving component coupled directly to the second surface of the passive layer.

Photodiode array for imaging applications

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Guilderland, NY, United States of America

Sabarni Palit