Patents by Inventor Pavel Cheben

Pavel Cheben has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8503839
    Abstract: A waveguide cores consisting of a subwavelength grating permits transmission of light without diffraction in a discontinuous manner, wherein the energy is provided by field hopping between subwavelength material segments of higher index. The use of alternating segments permits design of waveguides having desired effective index, mode confinement factor, birefringence, polarization mode or mode dispersions, polarization dependent loss, thermal sensitivity, or nonlinear optical coefficient. An optical system comprises a waveguide having such a core, clad on at least one side, extending between two ends, and wavelength-limiting optical components in optical communication with the ends.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: August 6, 2013
    Assignee: National Research Council of Canada
    Inventors: Pavel Cheben, Przemek J. Bock, Jens H. Schmid, Dan-Xia Xu, Adam Densmore, Siegfried Janz
  • Patent number: 8351043
    Abstract: A spectrometer has a multi-input aperture for admitting an input wavefront and an array of multiple waveguide structures terminating at the multi-input aperture. The input wavefront is incident on each of the waveguide structures, which provide a dispersive function for the input wavefront. Interferometers are formed by elements of the waveguide structures. The interferometers have different optical path length differences (OPDs). The interferometers provide a wavelength responsive output for spatially extended light sources. The output of the interferometers is detected with a detector array. The spectrometer has an improved etendue, and in some embodiments very high resolution.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: January 8, 2013
    Assignee: National Research Council of Canada
    Inventors: Pavel Cheben, Siegfried Janz, Miroslaw Florjanczyk, Dan-Xia Xu
  • Publication number: 20120183250
    Abstract: A waveguide cores consisting of a subwavelength grating permits transmission of light without diffraction in a discontinuous manner, wherein the energy is provided by field hopping between subwavelength material segments of higher index. The use of alternating segments permits design of waveguides having desired effective index, mode confinement factor, birefringence, polarization mode or mode dispersions, polarization dependent loss, thermal sensitivity, or nonlinear optical coefficient. An optical system comprises a waveguide having such a core, clad on at least one side, extending between two ends, and wavelength-limiting optical components in optical communication with the ends.
    Type: Application
    Filed: January 13, 2012
    Publication date: July 19, 2012
    Inventors: Pavel CHEBEN, Przemek J. BOCK, Jens H. SCHMID, Dan-Xia XU, Adam DENSMORE, Siegfried JANZ
  • Publication number: 20100290037
    Abstract: Methods and devices related to a sensor element for use in the detection and monitoring of molecular interactions. The sensor element uses a silicon-on-insulator wafer optically coupled to a silicon prism. The wafer has a thin silicon film top layer, a silicon substrate layer, and a buried silicon dioxide layer sandwiched between the silicon film and substrate layers. The wafer is coupled to the prism on the wafer's substrate side while the interactions to be monitored are placed on the wafer's silicon film side. An incident beam is directed at the prism and the incident angle is adjusted until the beam optically couples to the silicon film's optical waveguide mode. When this occurs, a decrease in the intensity of the reflected beam can be detected. The molecular interactions affect the phase velocity or wave vector of the propagating mode. Similarly, instead of measuring the incident angle at which optical coupling occurs, the phase of the reflected beam may be measured.
    Type: Application
    Filed: August 15, 2007
    Publication date: November 18, 2010
    Applicant: NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Dan-xia Xu, Adam Densmore, Andre Delage, Pavel Cheben, Siegfried Janz
  • Patent number: 7778499
    Abstract: Methods and devices relating to a sensor for use in detecting and monitoring molecular interactions. A silicon waveguide sensing element is provided along with a layer of silicon. A silicon oxide layer is also provided between the waveguide element and the layer of silicon. The sensing element is adjacent to an aqueous solution in which the molecular interactions are occurring. A light beam travelling in the silicon waveguide creates an evanescent optical field on the surface of the sensing element adjacent to the boundary between the sensing element and the aqueous medium. Molecular interactions occurring on this surface affect the intensity or the phase of the light beam travelling through the waveguide by changing the effective refractive index of the medium. By measuring the effect on the intensity, phase, or speed of the light beam, the molecular interactions can be detected and monitored in real time.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: August 17, 2010
    Assignee: National Research Council of Canada
    Inventors: Siegfried Janz, Pavel Cheben, Andre Delage, Adam Densmore, Dan-Xia Xu
  • Publication number: 20100165351
    Abstract: Methods and devices relating to sensors and sensor blocks for use in detecting and monitoring molecular interactions. A silicon waveguide sensing element is provided along with a layer of silicon. A silicon oxide layer is also provided between the waveguide element and the layer of silicon. The sensing element is adjacent to an aqueous solution in which the molecular interactions are occurring. A light beam travelling in the silicon waveguide creates an evanescent optical field on the surface of the sensing element adjacent to the boundary between the sensing element and the aqueous medium. Molecular interactions occurring on this surface affect the intensity or the phase of the light beam travelling through the waveguide by changing the effective refractive index of the medium. By measuring the effect on the intensity, phase, or speed of the light beam, the molecular interactions can be detected and monitored in real time. Various configurations using this sensor technology is also disclosed.
    Type: Application
    Filed: April 9, 2008
    Publication date: July 1, 2010
    Inventors: Dan-Xia Xu, Adam Densmore, Andre Delage, Pavel Cheben, Siegfried Janz
  • Publication number: 20100110443
    Abstract: A spectrometer has a multi-input aperture for admitting an input wavefront and an array of multiple waveguide structures terminating at the multi-input aperture. The input wavefront is incident on each of the waveguide structures, which provide a dispersive function for the input wavefront. Interferometers are formed by elements of the waveguide structures. The interferometers have different optical path length differences (OPDs). The interferometers provide a wavelength responsive output for spatially extended light sources. The output of the interferometers is detected with a detector array. The spectrometer has an improved etendue, and in some embodiments very high resolution.
    Type: Application
    Filed: March 20, 2008
    Publication date: May 6, 2010
    Applicant: NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Pavel Cheben, Siegfried Janz, Miroslaw Florjanczyk, Dan-Xia Xu
  • Patent number: 7680371
    Abstract: An interface device for performing mode transformation in optical waveguides includes an optical waveguide core for propagating light of a particular wavelength or a plurality of wavelengths. The optical waveguide core terminates in a subwavelength grating configured to change the propagation mode of the light. The subwavelength grating has a pitch sufficiently less than the wavelength of the light to frustrate diffraction. The device can thus serve as an optical coupler between different propagating media, or as an anti-reflective or high reflectivity device.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: March 16, 2010
    Assignee: National Research Council of Canada
    Inventors: Pavel Cheben, Siegfried Janz, Dan-Xia Xu, Jens Schmid, Adam Densmore, Jean Lapointe
  • Publication number: 20080292236
    Abstract: Methods and devices relating to a sensor for use in detecting and monitoring molecular interactions. A silicon waveguide sensing element is provided along with a layer of silicon. A silicon oxide layer is also provided between the waveguide element and the layer of silicon. The sensing element is adjacent to an aqueous solution in which the molecular interactions are occurring. A light beam travelling in the silicon waveguide creates an evanescent optical field on the surface of the sensing element adjacent to the boundary between the sensing element and the aqueous medium. Molecular interactions occurring on this surface affect the intensity or the phase of the light beam travelling through the waveguide by changing the effective refractive index of the medium. By measuring the effect on the intensity, phase, or speed of the light beam, the molecular interactions can be detected and monitored in real time.
    Type: Application
    Filed: September 13, 2007
    Publication date: November 27, 2008
    Inventors: Siegfried Janz, Pavel Cheben, Andre Delage, Adam Densmore
  • Publication number: 20080193080
    Abstract: An interface device for performing mode transformation in optical waveguides includes an optical waveguide core for propagating light of a particular wavelength or a plurality of wavelengths. The optical waveguide core terminates in a subwavelength grating configured to change the propagation mode of the light. The subwavelength grating has a pitch sufficiently less than the wavelength of the light to frustrate diffraction. The device can thus serve as an optical coupler between different propagating media, or as an anti-reflective or high reflectivity device.
    Type: Application
    Filed: October 18, 2007
    Publication date: August 14, 2008
    Applicant: NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Pavel Cheben, Siegfried Janz, Dan-Xia Xu, Jens Schmid, Adam Densmore, Jean Lapointe
  • Publication number: 20080193079
    Abstract: An interface device for performing mode transformation in optical waveguides includes an optical waveguide core for propagating light of a particular wavelength. The optical waveguide core terminates in a subwavelength grating configured to change the propagation mode of the light. The subwavelength grating has a pitch sufficiently less than the wavelength of the light to frustrate diffraction. The device can thus serve as an optical coupler between different propagating media, or as an anti-reflective or high reflectivity device.
    Type: Application
    Filed: February 13, 2007
    Publication date: August 14, 2008
    Applicant: NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Pavel Cheben, Siegfried Janz, Dan-Xia Xu, Jens Schmid, Adam Densmore, Jean Lapointe
  • Patent number: 7376308
    Abstract: The multichannel waveguide device includes an array of waveguides located in a plane. Each waveguide channel has a redirecting element for redirecting a guided wave out of said plane, or vice versa. The redirecting elements are staggered in the direction of the waveguides so as to transform a one-dimensional array of in-plane waves into a two-dimensional array of out-of-plane waves, or vice versa.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: May 20, 2008
    Assignee: National Research Council of Canada
    Inventors: Pavel Cheben, Siegfried Janz, Boris Lamontagne, Dan-Xia Xu
  • Patent number: 7376305
    Abstract: An Echelle grating has alternate first (1a) and second (1b) sets of facets (1). The first set of facets (1a) is operative to reflect incident light (4) for diffraction and the second set of facets (1b) extends between adjacent facets of the first set (1a). Only the first set of facets (1a) is metallized to enhance reflection. The second set of facets (1b) is left unmetallized. This configuration reduces polarization dependent loss (PDL).
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: May 20, 2008
    Assignee: Enablence Inc.
    Inventors: Andre Delage, Boris Lamontagne, Kokou Dossou, Siegfried Janz, Pavel Cheben, Lynden Erickson, Dan-Xia Xu, Sylvain Charbonneau
  • Patent number: 7317535
    Abstract: A spectroscopic method and system for the spectral analysis of an optical signal directed to a wavelength dispersive component having two interleaved dispersive devices. For a single wavelength, the optical signal exiting the interleaved dispersive devices includes two wavefronts generally disposed at an angle to one another and producing an interference pattern. The interference pattern is detected and subsequently analyzed via a Fourier transform to produce the optical spectrum of the input beam. The method and system are applicable in a planar waveguide environment, in reflection and transmission geometries.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: January 8, 2008
    Assignee: National Research Council of Canada
    Inventors: Pavel Cheben, Ian Powell, Siegfried Janz, Dan-Xia Xu
  • Patent number: 7272276
    Abstract: An optical performance monitor for measuring the performance of optical networks has an echelle grating for demultiplexing an input beam into a plurality of wavelengths that are focused onto an array of divided output waveguides. Each divided output waveguide is positioned to receive a corresponding demultiplexed wavelength from the echelle grating or other waveguide multiplexer device. The divided output waveguides laterally separate the corresponding demultiplexed wavelength into a first and second portions. A detector array is positioned to receive the respective portions of the demultiplexed wavelengths and by comparing their relative intensity it is possible to detect any drift in the nominal wavelengths of the channels.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: September 18, 2007
    Assignee: Enablence Inc.
    Inventors: Matt Pearson, Lynden Erickson, John Miller, Siegfried Janz, Dan-Xia Xu, Pavel Cheben, Andre Delage, Boris Lamontagne, Sylvain Charbonneau
  • Patent number: 7194177
    Abstract: In order to make a photonic device incorporating a waveguide, a waveguide is formed with a predetermined geometry. Birefringence is then controlled by determining the amount of stress induced within the waveguide.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: March 20, 2007
    Assignee: National Research Council of Canada
    Inventors: Dan-Xia Xu, Pavel Cheben, Dan Dalacu, Siegfried Janz
  • Patent number: 7163769
    Abstract: A photosensitive material, suitable for image-wise recording, e.g., holographic recording of data or other information, comprises an organic species in an organic-inorganic matrix, the organic species comprising a material having a refractive index which changes upon exposure to actinic radiation. The organic-inorganic matrix may be an organically modified glass. The photo-sensitive material may be made using the sol-gel process.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: January 16, 2007
    Inventors: Pavel Cheben, Maria Luisa Calvo
  • Publication number: 20060209411
    Abstract: An Echelle grating has alternate first (1a) and second (1b) sets of facets (1). The first set of facets (1a) is operative to reflect incident light (4) for diffraction and the second set of facets (1b) extends between adjacent facets of the first set (1a). Only the first set of facets (1a) is metallized to enhance reflection. The second set of facets (1b) is left unmetallized. This configuration reduces polarization dependent loss (PDL).
    Type: Application
    Filed: November 26, 2002
    Publication date: September 21, 2006
    Inventors: Andre Delage, Boris Lamontagne, Kokou Dossou, Siegfried Janz, Pavel Cheben, Lynden Erickson, Dan-Xia Xu, Sylvain Charbonneau
  • Publication number: 20060055935
    Abstract: A spectroscopic method and system for the spectral analysis of an optical signal directed to a wavelength dispersive component having two interleaved dispersive devices. For a single wavelength, the optical signal exiting the interleaved dispersive devices includes two wavefronts generally disposed at an angle to one another and producing an interference pattern. The interference pattern is detected and subsequently analyzed via a Fourier transform to produce the optical spectrum of the input beam. The method and system are applicable in a planar waveguide environment, in reflection and transmission geometries.
    Type: Application
    Filed: September 9, 2005
    Publication date: March 16, 2006
    Inventors: Pavel Cheben, Ian Powell, Siegfried Janz, Dan-Xia Xu
  • Publication number: 20050196114
    Abstract: In order to make a photonic device incorporating a waveguide, a waveguide is formed with a predetermined geometry. Birefringence is then controlled by determining the amount of stress induced within the waveguide.
    Type: Application
    Filed: September 29, 2004
    Publication date: September 8, 2005
    Applicant: National Research Council of Canada
    Inventors: Dan-Xia Xu, Pavel Cheben, Dan Dalacu, Siegfried Janz