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Institut National d'Optique Patents
Assignee:
Institut National d'Optique
Address:
Quebec, CA
No. of patents:
92
Patents:


1 2










Patent Number Title Of Patent Date Issued
8574920 Optical fiber polarimetric chemical sensor with modulated injection of sample fluid November 5, 2013
An optical fiber polarimetric chemical sensor for capillary gas chromatography in which a sample fluid is injected into a capillary in the form of a periodic pulse train. Each individual pulse defines a moving polarization coupling zone that affects the polarization state of the ligh
8263903 Method for stablizing an output of a pulsed laser system using pulse shaping September 11, 2012
A method for stabilizing an output of a pulsed laser system includes a directly modulated laser diode by mitigating the effect of switching transients on the temporal shape of the outputted pulses. The method includes controlling a pulse shaping signal to define, over time, processin
8254015 System and method for the spatial tailoring of laser light using temporal phase modulation August 28, 2012
Laser systems and methods for providing an output light beam having a target spatial pattern are provided. A light generating module generates an input light beam, whose spectral profile is then tailored by imposing thereon a controllable phase modulation. The obtained spectrally tailore
8238390 Methods for stabilizing the output of a pulsed laser system having pulse shaping capabilities August 7, 2012
Methods stabilize the output of a pulsed laser system using pulse shaping capabilities. In some embodiments, transient effects following a transition between a QCW regime and a pulse shaping regime are mitigated by ensuring that the average QCW optical power substantially corresponds
8171801 Micro-thermistor gas pressure sensor May 8, 2012
An apparatus and method precisely measure gas pressure over a large dynamic range and with good immunity to temperature fluctuations, encompassing applications such as gas sensing, bolometer imaging and industrial process monitoring. The micro-thermistor gas pressure sensor assembly
8144737 Adjustable pulsewidth picosecond fiber laser March 27, 2012
A pulsed fiber laser generating light pulses in the picosecond range has an adjustable pulsewidth. The fiber laser includes a figure-of-eight type laser cavity, preferably of polarization-maintaining optical fiber, defining reciprocal and non-reciprocal loops. A gain medium is disposed
8117898 Method for sensing gas composition and pressure February 21, 2012
A method for sensing gas composition and gas pressure, based on the thermal constants of a variable electrical resistor, is presented. The method for sensing gas composition and pressure includes monitoring a variable electrical resistor whose dynamic thermal response is determined b
8081797 Selective and adaptive illumination of a target December 20, 2011
There are provided a method and a system for illuminating one or more target in a scene. An image of the scene is acquired using a sensing device that may use an infrared sensor for example. From the image, an illumination controller determines an illumination figure, such that the i
8073027 Digital laser pulse shaping module and system December 6, 2011
A digital pulse shaping module for controlling a pulsed laser oscillator according to a digital input waveform is provided. The pulse shaping module includes a clock generator generating a plurality of phase-related clock signals and a shape generator which outputs a digital shape signal
8059334 Optical fiber amplifier system and method November 15, 2011
An optical fiber amplifier system is described and comprises a first optical fiber having a doped core with a first gain spectral profile upon being pumped. The first optical fiber is adapted to receive an optical signal from a light source. A second optical fiber has a doped core with
8014577 Micro-array analysis system and method thereof September 6, 2011
There is described a system and a method for analyzing spots in a micro-array, the spots containing targeted specimen, the method comprising the steps of: providing a slide with a micro-array of the spots thereon; illuminating at least one of the spots; directing the light onto the a
8005528 Apparatus for elucidating reaction dynamics of photoreactive compounds from optical signals affe August 23, 2011
A device elucidates reaction dynamics of photoreactive compounds present in a region of interest (ROI) of a tissue, the ROI being submitted to a controllably-varying and spatially homogenous magnetic field. The device includes at least one electrical coil or magnet for externally applyin
7974319 Spectrally tailored pulsed fiber laser oscillator July 5, 2011
High power optical pulses generating methods and laser oscillators are provided. A light generating module generates seed optical pulses having predetermined optical characteristics. A spectrum tailoring module is then used to tailor the spectral profile of the optical pulses. The sp
7895007 Digital signal processing in optical systems used for ranging applications February 22, 2011
Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes being too weak to al
7883535 Device and method for transmitting multiple optically-encoded stimulation signals to multiple ce February 8, 2011
The present invention concerns a device and method for transmitting multiple optically-encoded stimulation signals to multiple stimulation sites, especially cell locations. The device uses a primary optical fiber to transmit specific wavelength components of an encoded light signal to
7876497 Multi-stage long-band optical amplifier with ASE re-use January 25, 2011
There is provided a long-band rare-earth-doped optical amplifier and method for amplifying an optical signal. The optical amplifier has a pre-, a mid- and a post-amplification stage. Only the mid-amplification stage is pumped with a pump light source. The other two are pumped using A
7873091 Laser diode illuminator device and method for optically conditioning the light beam emitted by t January 18, 2011
A laser diode illuminator device and a method for optically conditioning the output beam radiated from such a device, so that highly-demanding illumination application requirements that call for high output powers within a specified field of illumination can be addressed. At the heart
7864321 Evanescent wave multimode optical waveguide sensor with continuous redistribution of optical pow January 4, 2011
There is provided an evanescent wave multimode optical waveguide sensitive to a chemical species or to a physical parameter. The optical waveguide comprises a core and a cladding having a cladding refractive index lower than that of the core for guiding light to be propagated in the opti
7855376 Lighting system and method for illuminating and detecting object December 21, 2010
An object-detecting lighting system comprises a light source emitting visible light. A source controller is connected to the light source to drive the light source into emitting the visible light in a predetermined mode. An optical detector is positioned with respect to the light source
7835599 Flow cytometry analysis across optical fiber November 16, 2010
A flow cytometer type apparatus and method for analyzing a fluid, where the fluid is fed through a passageway within an optical fiber and the light is guided by the fiber across the passageway and intersects the fluid therein. The apparatus includes an optical fiber with a passageway
7801333 Vision system and a method for scanning a traveling surface to detect surface defects thereof September 21, 2010
There is provided a vision system and a method for scanning a traveling surface such a road to detect surface defects thereof such as cracks. The vision system, which is mountable on a vehicle, is provided with a linear imaging system for imaging successive adjacent transversal linear
7773294 Low-average-power parabolic pulse amplification August 10, 2010
There is provided a parabolic pulse amplifier for amplifying a pulse light signal. The amplifier comprises an ytterbium-doped amplification waveguide pumped using a pump source with a pump central wavelength substantially offset from the absorption transition peak wavelength. The pum
7680385 Self-supported optical correlator March 16, 2010
A self-supported optical correlator has a first holder having two opposite ends, one of the opposite ends being provided with anchor points, the other end being provided with a light source. The correlator also has a second holder having two opposite ends, one of which is provided with
7663793 Wide angle immersive display system February 16, 2010
A wide angle display system, comprising a scanner having at least one reflective surface and an axis of rotation, a dome having a reflective inner surface, the inner surface having an axis of revolution which is coincident with the axis of rotation of the scanner, at least one linear
7663749 Method and system to measure the concentration of constituent elements in an inhomogeneous mater February 16, 2010
A system and method to improve the accuracy of the measure of constituent element(s) in a sample containing domains potentially including the constituent element(s) are described herein. For each domain, the volume of the domain is estimated and the concentration of the constituent e
7640122 Digital signal processing in optical systems used for ranging applications December 29, 2009
Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes being too weak to al
7635854 Method and apparatus for optical level sensing of agitated fluid surfaces December 22, 2009
A method and apparatus provide for non-contact optical measurement of the level of a fluid stored in a tank or container, the surface of the fluid being possibly agitated. The method processes numerically the digitized signal waveforms generated by a lidar apparatus based on a pulsed
7586678 Optical imaging system for obtaining multi-field-of-view image September 8, 2009
High-resolution imaging systems are provided. In one embodiment, an imaging system based on a Cassegrain or Schmidt-Cassegrain objective, with coaxial primary and secondary mirrors, is provided with a microdisplacement mechanism acting on the secondary mirror to displace the image on
7554652 Light-integrating rangefinding device and method June 30, 2009
A rangefinding device and a method for determining the range of an object from a rangefinding device are provided. A train of light pulses each having an emission time and a pulse duration is generated. The pulse duration is set to twice the round-trip time to a maximum range of the
7519411 Method for elucidating reaction dynamics of photoreactive compounds from optical signals affecte April 14, 2009
A method elucidates reaction dynamics of photoreactive compounds from time-resolved optical signals affected by an external magnetic field. A coil or magnet applies a magnetic field at a region of interest (ROI). A light or laser illuminates the ROI with a probe beam. An optical fiber
7515275 Optical apparatus and method for distance measuring April 7, 2009
An optical sensor for determining a distance between a target and a probe head is described. The optical sensor comprises a light source delivering a broadband spectrum; a fiber-optic Michelson interferometer (FOMI) for creating an interferogram; and an analyzer unit for receiving the
7486438 High-resolution optical imaging systems February 3, 2009
High-resolution imaging systems are provided. In one embodiment, an imaging system based on a Cassegrain or Schmidt-Cassegrain objective, with coaxial primary and secondary mirrors, is provided with a microdisplacement mechanism acting on the secondary mirror to displace the image on
7439513 Fast microbolometer pixels with integrated micro-optical focusing elements October 21, 2008
Fast microbolometer pixels integrating micro-optical focusing elements are provided. Each microbolometer pixel includes a focusing element located between the pixel body and a substrate, this focusing element preferably sending radiation back towards the central portion of the microbolom
7388662 Real-time measuring of the spatial distribution of sprayed aerosol particles June 17, 2008
An optical system for measuring in real-time the spatial distribution of aerosol particles, such as pesticides or the like, sprayed from a vehicle over an agricultural field. An optical sensor is mounted directly on the vehicle and sends an excitation light beam through the aerosol as it
7324724 Optical fiber devices using component insertion January 29, 2008
The present invention provides an optical fiber device that takes advantage of the fiber structure to construct mechanically stable devices with components inserted in the optical path. An optical component is inserted in a cavity transversally machined across an optical fiber. The c
7317849 Optical fiber sensor and method January 8, 2008
An optical fiber sensor for detecting curvature of a body/structure comprises a cladding having an outer periphery. A central core receives and transmits light. The central core has Bragg gratings and is positioned in neutral planes of the cladding. Peripheral cores receive and trans
7274448 Short range LIDAR apparatus having a flat spatial response September 25, 2007
A flat spatial response LIDAR apparatus for detecting particles within a short range is provided. The apparatus includes a light source projecting a light beam which is back-scattered by the particles to be detected. The back-scattered light is received, detected and analyzed. A spatial
7260131 Symmetrization device and laser diode system provided with the same August 21, 2007
A symmetrization device and laser diode system using such a device is shown. The device has adjacent lens components transforming beamlets from a laser diode array. Each lens component has input and output surfaces, each having a profile in the propagation direction of the beamlets and a
7209605 Packaged optical sensors on the side of optical fibers April 24, 2007
The present invention concerns an optical sensor located on a preferred azimuthal portion of the side of an optical fiber. An optical fiber having two opposite ends, a core and a cladding and at least one sensing area is disclosed. Each of the sensing areas is located between the two
7181117 Fractional cladding for optical fibers February 20, 2007
An optical fiber system comprises an optical fiber having a doped core and a first cladding about the doped core. The optical fiber has a first longitudinal portion and a second longitudinal portion, and is arranged such that the first longitudinal portion and the second longitudinal
7088493 Light modulating microdevice August 8, 2006
A light modulator comprises a mirror, a substrate provided with at least one electrode, and at least one hinge extending between the substrate and the mirror. The mirror is flexible with the hinge being displaceable for allowing for the displacement and/or the deformation of the mirror.
7077969 Miniature microdevice package and process for making thereof July 18, 2006
The present invention is concerned with a miniature microdevice package and a process of making thereof. The package has a miniature frame substrate made of a material selected from the group including: ceramic, metal and a combination of ceramic and metal. The miniature frame substr
7062125 Prismatic reflection optical waveguide device June 13, 2006
A prismatic reflection optical waveguide device having an input and an output optical waveguide segments and a reflection interface provided therebetween apt to convey a light beam from one direction to another, wherein the light beam is conveyed by a single reflection on the reflect
7058269 Reconstructed glass for fiber optic applications June 6, 2006
The present invention concerns a preform for an optical fiber, an optical fiber so obtained and methods for making the same. The fiber is characterized in that porous glass doped with at least one dopant is used. Resulting fibers can be used to make high attenuation fibers.
7023001 Method for engraving materials using laser etched V-grooves April 4, 2006
Disclosed is a method for engraving materials such as fused silica or ceramic by continuously actuating a laser producing a Gaussian beam, directing the beam towards the surface of the substrate and moving the beam relative to the surface of the substrate so that a V-groove is obtain
6999182 Method and system for characterizing aspheric surfaces of optical elements February 14, 2006
A system for characterizing an aspheric surface with respect to an expected shape thereof, comprising a light source to emit light of desirable properties. A ferrofluid deformable mirror apparatus has a reflective surface being controllably deformable. The reflective surface is shape
6985239 Position-sensing device for 3-D profilometers January 10, 2006
An apparatus for sensing position data of a light pattern created by a known light source on an object, comprising an optical system for collecting an incident light beam of the light pattern and transmitting the incident light beam to a beam splitter. The beam splitter has a known r
6870682 Apparatus for reshaping an optical beam bundle March 22, 2005
Apparatus for shaping an optical beam bundle carrying a plurality of substantially parallel optical beams disposed in a common plane of travel. First reflective facets and second reflective facets are provided, the first reflective facets being oriented so as to deflect the optical beams
6849170 Process for making microdevice with movable microplatform February 1, 2005
A process for making a microdevice that includes the steps of providing a base member and selectively electroforming a support member for supporting a microplatform with respect to the base member. The process also includes the steps of selectively electroforming the microplatform and fo
6795611 Light coupling between a light source and an optical waveguide September 21, 2004
A coupling technique for the side coupling of light from a light source into a waveguide is provided. A transversal groove is made into a section of the waveguide, extending into the target light guiding region. A coupling element is coupled to the light source at one of its end to r
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