Illusense, Inc.

British Columbia Institute of Technology

The University of British Columbia

Kirk William Madison

Kyzyl Herzog

James Lawrence Booth

Jicheng Wang

William Bowden

Nathan Chan

Bruce George Klappauf

Roman V Krems

Pinrui Shen

David Erik Fagnan

A method and an apparatus for determining a signed Doppler frequency shift of an optical signal. The method comprises generating a reference signal having a reference optical spectrum and a transmission signal having a transmission optical spectrum; directing the transmission signal to at least one target; receiving a reflection signal from the at least one target, the reflection signal having a reflection optical spectrum; estimating the reflection optical spectrum; and based on the estimated reflection optical spectrum and the reference optical spectrum, determining a signed Doppler frequency shift of the reflection optical spectrum, wherein at least one of the transmission optical spectrum and the reference optical spectrum comprises a first component having a first frequency and a first amplitude, and a second component having a second frequency, different from the first frequency, and a second amplitude, different from the first amplitude, and wherein the at least one of the transmission optical spectrum and the reference optical spectrum is asymmetric about the midpoint of the reference optical spectrum.

Method and system for simultaneous detection of signed doppler shifts and range measurements

Apparatus for determining a range to one or more targets are provided. In various embodiments, the apparatus comprises a field transceiver module and a computing node in communication with each other. The field transceiver module is configured to generate an electromagnetic probe carrier field; under the control of the computing node, phase-modulate the carrier probe field according to a time-periodic probe modulation waveform having a probe modulation phase that includes a probe modulation frequency and a probe modulation phase offset, thereby generating a modulated probe field; direct the modulated probe field at one or more targets and to receive a modulated reflected probe field from one or more targets; demodulate the modulated reflected probe field and generate a probe signal corresponding to the probe modulation waveform. The computing node is configured to generate a control signal corresponding to the probe modulation waveform; receive the probe signal from the field transceiver module; compute a product of the probe signal and a time periodic reference waveform having a reference phase that includes a reference frequency and a reference phase offset; compute an amplitude or a power of the product; determine one or more reference waveforms corresponding to extrema of the amplitude or the power of the product; and determine the range to the one or more targets based on the extrema of the amplitude or the power of the product.

Method and device for interferometric range measurements

A method determines a total velocity average cross-section parameter&#x3c3;&#x3bd;in a relationship of the form &#x393;(U)=n&#x3c3;&#x3bd;&#xb7;&#x192;(U, U), where: &#x393;(U) is a rate of exponential loss of sensor atoms from a cold atom sensor trap of trap depth potential energy U in a vacuum environment due to collisions with residual particles in the vacuum environment; nis a number density of residual particles in the vacuum environment; Uis a parameter given by which relates the masses of the sensor atoms mand residual particles mto the total velocity average cross-section parameter&#x3c3;&#x3bd;; and &#x192;(U, U) is a function of the trap depth potential energy U and the parameter Uwhich models a naturally occurring dependence of the loss rate &#x393;(U) on the trap depth potential energy U and the parameter U, where &#x192;(U=0, U) is unity for all U.

Quantum pressure standard and methods for determining and using same

Systems and methods for reflectance imaging using visible and/or non-visible light and optical sensors in a probe for use in a fluid transport pipeline are provided. One or more light beams may be emitted towards a bore-defining surface of a pipe wall. One or more first optical sensors may sense first image data based on light scattered by incidence of the light beams on the bore-defining surface. The first image data may be used to determine a first distance value corresponding to a distance of the bore-defining surface from a first reference point. The first image data may be used to determine a plurality of speckle patterns from the first image data, each speckle pattern associated with light scattered from light-scattering particles contained in the fluid at a corresponding time, and to determine a flow direction of the fluid based on the plurality of speckle patterns.

Systems and methods for optical scanning of fluid transport pipelines

An apparatus and method that can measure flux density in-situ under high vacuum conditions includes a means for confining a collection of identical, elemental sensor particles to a volume of space by initial cooling by laser or another method, then confinement in a sensor volume using externally applied magnetic and/or optical fields.

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Vancouver, Canada

Kirk William Madison