Patents by Inventor Thomas W. Mossberg

Thomas W. Mossberg 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: 10459169
    Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: October 29, 2019
    Assignee: Finisar Corporation
    Inventors: Xiaojie Xu, Thomas W. Mossberg, Tengda Du, Christoph M. Greiner, Dmitri Iazikov
  • Patent number: 10386553
    Abstract: An optical element (transmissive or reflective) includes a transmissive layer comprising two different optical media arranged among discrete volumes arranged along the layer. The discrete volumes are arranged to approximate a desired phase function (typically modulo 2?) and are smaller than an operational wavelength in order to provide a range of phase delays needed to adequately approximate the desired phase function.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: August 20, 2019
    Assignee: FINISAR CORPORATION
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Publication number: 20190219769
    Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.
    Type: Application
    Filed: March 26, 2019
    Publication date: July 18, 2019
    Inventors: Xiaojie XU, Thomas W. MOSSBERG, Tengda DU, Christoph M. GREINER, Dmitri IAZIKOV
  • Publication number: 20190212479
    Abstract: An optical element includes a transmissive layer comprising a multitude of discrete volumes of first and second optical media arranged along the transmissive layer. The discrete volumes are arranged to approximate a desired phase function (typically modulo 2?) and are smaller than an operational wavelength in order to provide a range of phase delays needed to adequately approximate the desired phase function. Effecting at least partial reflow of one or both of the optical media can smooth the morphology of the transmissive layer so as to reduce unwanted diffraction or scattering.
    Type: Application
    Filed: March 17, 2019
    Publication date: July 11, 2019
    Inventors: Dmitri Iazikov, Thomas W. Mossberg, Christoph M. Greiner, John H. Clark
  • Publication number: 20190120999
    Abstract: An optical element includes a transmissive layer arranged on a substrate and made up of discrete volumes of first and second optical media. The layer is between the substrate and another optical medium. The volumes are arranged so that, averaged over a wavelength's distance of an incident optical signal, the effective reflectivities of the two surfaces of the transmissive layer and the effective double-pass phase delay through the transmissive layer are substantially constant across the transmissive layer. The reflectivities and phase delay result in net power reflectivity that differs from that of the substrate in direct contact with the other optical medium. The transmissive layer can be arranged as an anti-reflection layer.
    Type: Application
    Filed: October 10, 2018
    Publication date: April 25, 2019
    Inventors: Dmitri Iazikov, Thomas W. Mossberg, Christoph M. Greiner, David S. Alavi
  • Patent number: 10254450
    Abstract: A method for improving surface accuracy of an optical component comprises: positioning a first surface of the optical component against a reference surface of a reference member; urging together the reference member and the optical component; adhering a second surface of the optical component to a first surface of a support member; and separating the reference member from the optical component while leaving the optical component adhered to the support member. Urging together the reference member and the optical component substantially conforms the surface accuracy of the first surface of the optical component to the surface accuracy of the reference surface of the reference member. Adhering the optical component to the support member and then separating the reference member from the optical component leaves the surface accuracy of the first surface of the optical component substantially in conformance with the surface accuracy of the first surface of the reference member.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: April 9, 2019
    Assignee: LIGHTSMYTH TECHNOLOGIES INC.
    Inventors: Christoph M. Greiner, Thomas W. Mossberg, Dmitri Iazikov
  • Patent number: 10241274
    Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: March 26, 2019
    Assignee: FINISAR CORPORATION
    Inventors: Xiaojie Xu, Thomas W. Mossberg, Tengda Du, Christoph M. Greiner, Dmitri Iazikov
  • Publication number: 20180128948
    Abstract: A reflective optical element includes a reflective surface comprising a multitude of discrete recessed and non-recessed areas arranged along the reflective surface. The discrete areas are arranged to approximate a desired phase function (typically modulo 2?) and are smaller than an operational wavelength in order to provide a range of phase delays needed to adequately approximate the desired phase function. Effecting at least partial reflow of one or more optical media or reflective materials can smooth the morphology of the reflective surface so as to reduce unwanted diffraction or scattering.
    Type: Application
    Filed: October 16, 2017
    Publication date: May 10, 2018
    Inventors: Dmitri Iazikov, Thomas W. Mossberg, Christoph M. Greiner, John H. Clark
  • Publication number: 20170261694
    Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.
    Type: Application
    Filed: March 9, 2017
    Publication date: September 14, 2017
    Inventors: Xiaojie Xu, Thomas W. Mossberg, Tengda Du, Christoph M. Greiner, Dmitri Iazikov
  • Patent number: 9703042
    Abstract: Transmissive diffraction grating(s), reflector(s), and multiple optical sources/receivers are arranged such that each one of multiple optical signals at corresponding different wavelengths co-propagating along a multiplexed beam path would: (i) be transmissively, dispersively diffracted at a multiplexed transmission region of a grating; (ii) propagate between the multiplexed transmission region and multiple demultiplexed transmission regions of a grating undergoing reflection(s) from the reflector(s); (iii) be transmissively, dispersively diffracted at the demultiplexed transmission regions; and (iv) propagate between the demultiplexed transmission regions and the sources/receivers along multiple demultiplexed beam paths.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: July 11, 2017
    Assignee: Finisar Corporation
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Publication number: 20170168202
    Abstract: A optical element (transmissive or reflective) includes a transmissive layer comprising two different optical media arranged among discrete volumes arranged along the layer. The discrete volumes are arranged to approximate a desired phase function (typically modulo 2?) and are smaller than an operational wavelength in order to provide a range of phase delays needed to adequately approximate the desired phase function.
    Type: Application
    Filed: February 27, 2017
    Publication date: June 15, 2017
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Patent number: 9618708
    Abstract: A first transmissive diffraction grating includes a multiplexed transmission region; a second diffraction grating includes multiple demultiplexed transmission regions that are spatially displaced from one another and characterized by average corresponding grating-normal vector direction, grating wavevector magnitude, and grating wavevector direction. The demultiplexed transmission regions differ with respect to at least one of those parameters.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: April 11, 2017
    Assignee: Finisar Corporation
    Inventors: Christoph M. Greiner, Thomas W. Mossberg, Dmitri Iazikov
  • Patent number: 9618664
    Abstract: An optical element (transmissive or reflective) includes a transmissive layer comprising two different optical media arranged among discrete volumes arranged along the layer. The discrete volumes are arranged to approximate a desired phase function (typically modulo 2?) and are smaller than an operational wavelength in order to provide a range of phase delays needed to adequately approximate the desired phase function.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: April 11, 2017
    Assignee: Finisar Corporation
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Publication number: 20170017038
    Abstract: Transmissive diffraction grating(s), reflector(s), and multiple optical sources/receivers are arranged such that each one of multiple optical signals at corresponding different wavelengths co-propagating along a multiplexed beam path would: (i) be transmissively, dispersively diffracted at a multiplexed transmission region of a grating; (ii) propagate between the multiplexed transmission region and multiple demultiplexed transmission regions of a grating undergoing reflection(s) from the reflector(s); (iii) be transmissively, dispersively diffracted at the demultiplexed transmission regions; and (iv) propagate between the demultiplexed transmission regions and the sources/receivers along multiple demultiplexed beam paths.
    Type: Application
    Filed: May 23, 2016
    Publication date: January 19, 2017
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Publication number: 20160306167
    Abstract: A optical element (transmissive or reflective) includes a transmissive layer comprising two different optical media arranged among discrete volumes arranged along the layer. The discrete volumes are arranged to approximate a desired phase function (typically modulo 2?) and are smaller than an operational wavelength in order to provide a range of phase delays needed to adequately approximate the desired phase function.
    Type: Application
    Filed: April 15, 2015
    Publication date: October 20, 2016
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Patent number: 9348091
    Abstract: Transmissive diffraction grating(s), reflector(s), and multiple optical sources/receivers are arranged such that each one of multiple optical signals at corresponding different wavelengths co-propagating along a multiplexed beam path would: (i) be transmissively, dispersively diffracted at a multiplexed transmission region of a grating; (ii) propagate between the multiplexed transmission region and multiple demultiplexed transmission regions of a grating undergoing reflection(s) from the reflector(s); (iii) be transmissively, dispersively diffracted at the demultiplexed transmission regions; and (iv) propagate between the demultiplexed transmission regions and the sources/receivers along multiple demultiplexed beam paths.
    Type: Grant
    Filed: December 20, 2014
    Date of Patent: May 24, 2016
    Assignee: Finisar Corporation
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Patent number: 9310535
    Abstract: An optical diffraction grating includes a substantially transparent grating substrate which has substantially flat first and second surfaces, and a set of grating lines on the first surface characterized by a grating spacing ?. The grating substrate has a temperature-dependent refractive index nsub and is immersed in a medium having a temperature-dependent refractive index nmed. The first and second substrate surfaces are non-parallel and form a dihedral angle ?. The gratings lines are substantially perpendicular to a plane of incidence defined by surface-normal vectors of the first and second surfaces. Variation of a diffraction angle ?d? with temperature, exhibited by the optical diffraction grating at a design wavelength ? and at a design incidence angle ?in in the plane of incidence, is less than that variation exhibited by a reference diffraction grating that has parallel first and second substrate surfaces but is otherwise identical to the optical diffraction grating.
    Type: Grant
    Filed: July 20, 2013
    Date of Patent: April 12, 2016
    Assignee: LightSmyth Technologies Inc.
    Inventors: Christoph M. Greiner, Thomas W. Mossberg, Dmitri Iazikov
  • Patent number: 9297937
    Abstract: A diffraction grating comprises a substrate with a set of protruding ridges and intervening trenches characterized by a ridge spacing ?, width d, and height h. The substrate comprises a dielectric or semiconductor material with a refractive index n1; the first substrate surface faces an optical medium with a refractive index n2 that is less than n1. Each ridge has a metal layer on its top surface of thickness t; at least a portion of the bottom surface of each trench is substantially free of metal. Over an operational wavelength range, ?/2n1<?<?/(n1+n2) can be satisfied. An optical signal can be incident on the diffractive elements from within the substrate at an incidence angle that exceeds the critical angle. The parameters n1, n2, ?, d, h, and t can be selected to yield desired polarization dependence or independence of the diffraction efficiency.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: March 29, 2016
    Assignee: LightSmyth Technologies, Inc.
    Inventors: Christoph M. Greiner, Thomas W. Mossberg, Dmitri Iazikov
  • Publication number: 20150309220
    Abstract: A diffraction grating comprises a substrate (with index nsub) with a surface facing an optical medium (with index nmed<nsub), a dielectric or semiconductor layer of thickness t on the substrate surface (with index nL?nsub), and a set of diffractive elements on the layer (with index nR?nmed). The diffractive elements comprise a set of ridges protruding into the optical medium, which fills trenches between the ridges, and are characterized by a spacing ?, a width d, and a height h. Over an operational wavelength range, ?/2nsub<?<?/(nsub+nmed). An optical signal incident on the diffractive elements from within the substrate at an incidence angle exceeding the critical angle, nsub, nmed, nL, nR, ?, d, h, and t result in wavelength-dependent, first-order diffraction efficiency of the grating greater than a prescribed level over the operational wavelength range for both s- and p-polarized optical signals.
    Type: Application
    Filed: April 28, 2015
    Publication date: October 29, 2015
    Inventors: Christoph M. Greiner, Thomas W. Mossberg, Dmitri Iazikov
  • Publication number: 20150277123
    Abstract: A near-to-eye display system includes a source of modulated light, a proximal optic positionable adjacent an eye of the user to receive the modulated light. The proximal optic has a plurality of groups of optically redirecting regions. The optically redirecting regions are configured to direct a plurality of beams of the modulated light into a pupil of the eye to form a contiguous illuminated portion of the retina of the eye. A first group of the optically redirecting regions receives modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a first portion of the retina. A second group of the optically redirecting regions receives modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a second portion of the retina.
    Type: Application
    Filed: February 3, 2015
    Publication date: October 1, 2015
    Inventors: David CHAUM, Thomas W. Mossberg, John R. Rogers