Georgia Tech Research Corporation

Lawrence Livermore National Security, LLC

Exxonmobil Research and Engineering Company

University of South Carolina

Innovationsagentur Gesellschaft M.b.h.

Innovationsagentur Gesellschaft

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Universitat Ulm

Boris Mizaikoff

Emmerich Bertagnolli

Jerry Chance Carter

Alois Lugstein

Christine Kranz

Mark M Disko

James M Brown

Jerome Faist

Michael P Chrisp

James Edward Trebes

Clifford C Walters

John Stephen Szobota

James W Chan

Stanley Michael Angel

Seong-Soo Kim

Andreas Wilk

Christy Charlton

Marcella Giovannini

Thomas Zemb

Anastacia M Manuel

Christophe Penisson

Johannes Theisen

Vjekoslav Kokoric

Methods and apparatuses are provided that greatly expand the utility of conventional hollow waveguide-based sensors via either straight, substrate-integrated channels or via meandering (e.g., circuitous, curved or folded optical paths) waveguide sensor designs. Full- or hybrid-integration of the meandering hollow waveguide with light source, detector, and light-guiding optics facilitates compact yet high-performance gas/vapor and/or liquid sensors of the substrate-integrated hollow waveguide sensor.

Substrate-integrated hollow waveguide sensors

A double-pass fiber-optic based spectroscopic gas sensor delivers Raman excitation light and infrared light to a hollow structure, such as a hollow fiber waveguide, that contains a gas sample of interest. A retro-reflector is placed at the end of this hollow structure to send the light back through the waveguide where the light is detected at the same end as the light source. This double pass retro reflector design increases the interaction path length of the light and the gas sample, and also reduces the form factor of the hollow structure.

Combined raman and IR fiber-based sensor for gas detection

A first waveguide has a top face positioned in an oil well borehole for wetting by returning drilling mud from a drill bit as drilling progresses. A second waveguide is positioned in the borehole for wetting by new drilling mud being pumped to the drill bit. MIR light rays are fed from an MIR light source into the first and second waveguides for causing evanescent waves to be generated by each waveguide for reacting with the molecules of the associated drilling mud, respectfully, whereby a modulated optical signal representative of spectra of components and particles in the associated drilling mud, respectively, are emitted from each waveguide. The modulated optical signals are converted to electrical signals, subtracted from one another to remove common mode signals, and passed into a processor programmed for extracting the spectra hydrocarbon components contained in the returning drilling mud as the result of the drilling activity.

Method and apparatus for a mid-infrared (MIR) system for real time detection of petroleum in colloidal suspensions of sediments and drilling muds during drilling operations, logging and production operations

Briefly described, embodiments of this disclosure, among others, include solid state, thin film waveguides, detection systems including waveguides, and methods of detecting target compounds.

Film thin waveguides, methods of fabrication thereof, and detection systems

A method of producing a device for simultaneously carrying out an electrochemical and a topographical near field microscopy is disclosed, which is characterized in that a probe suitable for topographic near field microscopy is covered by a conductive material, the conductive material is covered by an insulating layer, and the conductive material and the insulating layer are removed in the region of the immediate tip of the probe.

Method for producing a device for simultaneously carrying out an electrochemical and a topographical near-field microscopy

A device for simultaneously carrying out an electro-chemical and a topographical near field microscopy is described, which device comprises a region for topographical near field measurement and a region for electrochemical near field measurement, with the region for topographical near field measurement extending completely as far as to the immediate tip of the arrangement, characterized in that the region for electrochemical near field measurement starts at a defined distance from the immediate tip.

Device for simultaneously carrying out an electrochemical and a topographical near-field microscopy

Growing community of inventors

Ulm, Germany

Boris Mizaikoff