Physical Sciences, Inc.

Confluent Photonics Corporation

Galvanic Applied Sciences Inc.

Psi Environmental Instruments Corp.

Confluent Photonics Co.

Confluent Photonics Corporations

Michael B Frish

Steven J Davis

William J Kessler

Philip B Keating

Joseph Renard Morency

Stephen A Johnson

Peter E Nebolsine

Arthur A Boni

Christopher Lewis Templeman

Michael White

Anthony N Pirri

Shin-Juh Chen

David D Haydt

Nicholas F Aubut

Systems and method for analysing contaminants of a gas sample of natural gas are provided. An interrogation light beam propagates into a chamber of a multipass gas cell receiving the gas sample. The interrogation light beam has a wavelength controlled to alternately correspond to an absorption wavelength of HS and an absorption wavelength of an additional gas contaminant. The additional gas contaminant may for example be COor HO. In some implementation, a single laser emitter may be used to generate the interrogation light beam at the HS and COwavelengths. In some implementations, two different laser emitters may be used to generate the interrogation light beam at the HS and HO wavelengths. A WMS detection scheme may be used.

Multiple contaminants natural gas analyser

An apparatus for detecting leaks from a gas pipeline or storage system includes a light source configured to emit a beam with at least one spectral component capable of interacting with pipeline gas, a reflector configured to reflect a portion of the beam, an optical detector configured to detect the reflected beam, a signal processing module coupled to the output of the optical detector configured to analyze the detected beam and output a measured concentration value that characterizes the amount of target gas in the beam path, and a statistical processing module coupled to the signal processing module configured to store and analyze the measured concentration value. The statistical processing module is further configured to compute a value based on statistical information associated with the stored plurality of concentration values and compare the computed value to a first predetermined threshold, and transmit a first alarm signal if the computed value is greater than the first predetermined threshold.

Systems and methods for sensitive open-path gas leak and detection alarm

A light scattering sensor is provided with a cylindrical lens focusing received light along substantially parallel lines, or bands, that correspond to a range of scattering angles and a linear detector that detects the light intensity along the substantially parallel lines. By using a cylindrical lens, the lens serves as an auto-collimator, whereby light scattered at a specific angle from the collimated light beam strikes the linear detector at a corresponding specific location regardless of the location from where the light was scattered. Embodiments of the cylindrical lens-based light sensor can be applied to a number of different applications and industries that analyze light scattering intensity as a function of scattering angle. For example, embodiments of the cylindrical lens-based light scattering sensor can be used for monitoring a target fluid for contaminants.

Cylindrical lens-based light sensor and use of the sensor in an automated method and apparatus for monitoring a target fluid for contaminants

A miniature monolithic optical demultiplexer that comprises a dispersive optical element and a wavelength filter array. The miniature monolithic optical DWDM demultiplexer can be fabricated using micro- and nano-scale techniques common to the semiconductor industry. The operating principles and some characteristics of the DWDM demultiplexer are described. The device will be useful in the field of optical communication as a component within networks that perform all of the necessary switching, adding, dropping, and manipulating of optical signals entirely in the optical domain. With the inclusion of additional components, exemplary optical communication devices that can be built using the DWDM demultiplexer include optical add/drop multiplexers (OADM), Dense Wavelength Division Multiplexing (DWDM) routers, tunable filters, optical cross connects, and the like.

Miniature monolithic optical demultiplexer

A miniature monolithic optical add-drop multiplexer that comprises a dispersive optical element, a wavelength filter array and a diverter. The miniature monolithic optical DWDM add-drop multiplexer can be fabricated using micro- and nano-scale techniques common to the semiconductor industry. The operating principles and some characteristics of the DWDM add-drop multiplexer are described. The device will be useful in the field of optical communication as a component within networks that perform all of the necessary switching, adding, dropping, and manipulating of optical signals entirely in the optical domain.

Miniature monolithic optical add-drop multiplexer

An optical bench that provides a core component for a communication system that performs all of the necessary switching, adding, dropping, and manipulating of optical signals entirely in the optical domain. The optical bench comprises a dispersive optical element and a spatial light modulator. Various devices that are useful in the field of optical communication can be produced using the optical bench apparatus as a core component, with the addition of other components to the optical bench. Exemplary optical communication devices that can be built using the optical bench include optical add/drop multiplexers (OADM), Dense Wavelength Division Multiplexing (DWDM) routers, tunable filters, tunable laser sources, optical cross connects, and the like.

MEMS-based optical bench

Disclosed is a system for regulating the efficiency of a combustion process by detecting radiant energy emitted from ash particles entrained in the gas stream exiting the combustion chamber of a boiler or incinerator. The intensity of selected wavelengths of light emitted from the particles is indicative of the temperature of the particles. The change in the intensities of the selected wavelengths of light, and thus of the temperature of the gas stream at the furnace exit, is monitored, and a feedback control mechanism is used to regulate one or more combustion, pollution control, or heat transfer parameters thereby maximizing the thermal efficiency of the combustion process in the boiler or incinerator.

Apparatus for combustion, pollution and chemical process control

A coated substrate manufactured by applying a layer of a material to the substrate and generating thermal and pressure waves in the layer by exposing the layer to high intensity, short duration laser radiation, and the process of manufacturing such a coated substrate. The laser radiation is applied in an intensity range that creates an instantaneous surface vaporization of the layer material that in turn drives a pressure wave into the layer. The pressure wave interacts with the layer-substrate interface to create bonding between them of varying strengths and qualities depending on the intensity and duration of the initial laser pulse. A thermal wave is created in some regimes of operation, or results from compressional heating of the layer by the pressure wave, and is of sufficient energy to contribute to the bonding at the interface. The coating and the process for its creation has application in diverse areas where surface properties of a particular color, hardness, corrosion resistance, abrasion resistance, electrical conductivity, among others are desired.

Growing community of inventors

Andover, MA, United States of America

Michael B Frish