Patents Assigned to JDS Uniphase Inc.
  • Patent number: 7362972
    Abstract: An optical transmitter for sending supervisory data signals and line data signals as a composite optical signal through an optical fiber link is disclosed. The transmitter may take the form of a transmitter, transceiver or transponder and includes circuitry for receiving incoming line data bit rate information for varying and or controlling the modulation index by varying the supervisory carrier frequency amplitude in dependence upon the line data bit rate.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: April 22, 2008
    Assignee: JDS Uniphase Inc.
    Inventors: Gabriel Yavor, Jerry Zeng, Yuan Lin
  • Patent number: 7359053
    Abstract: An array of optical elements for processing a spatially dispersed optical beam including monitoring optical elements for determining the position of the optical beam in the array is disclosed. The monitoring optical elements have a width that varies in ay direction normal to the array axis, enabling the determination of the beam position across the monitoring elements in both x and y directions. The monitoring optical elements are preferably disposed in the end portions of the array for the beam tilt determination. The optical elements can be e.g. liquid crystal pixels or micro-mirrors.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: April 15, 2008
    Assignee: JDS Uniphase Inc.
    Inventors: Steven Harold Moffat, Stephen Robert de Hennin, Martin Matthews, David William Charles Markin, Philip Duggan
  • Patent number: 7302131
    Abstract: A micro-electro-mechanical (MEMs) mirror device for use in an optical switch is disclosed. A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment of the present invention electrostatic charges, which build up on exposed dielectric surfaces causing the mirror's angular position to drift over time, are minimized by positioning the hot and ground electrodes at different levels separated by a vertical surface, and placing the dielectric material on the vertical surface.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: November 27, 2007
    Assignee: JDS Uniphase Inc.
    Inventors: Yuan Ma, Graham McKinnon, John Michael Miller
  • Patent number: 7302132
    Abstract: A micro-electro-mechanical (MEMs) mirror device for use in an optical switch is disclosed. A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment of the present invention specially designed for wavelength switching applications, a greater range of arcuate motion for a mirror mounted thereon is provided by enabling the platform to rotate about two perpendicular axes.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: November 27, 2007
    Assignee: JDS Uniphase Inc.
    Inventors: John Michael Miller, Yuan Ma, Barrie Keyworth, Mohiuddin Mala, Graham McKinnon
  • Patent number: 7253906
    Abstract: A method for the rapid measurement of polarization dependent properties of an optical device under test uses a novel technique to generate light in four different polarization states in which each state is individually sensed at a different interference frequency. The device for executing this method includes a Mach-Zehnder interferometer (M-Z) having a reference arm and a signal arm. In the signal arm, a device called a “polarization state frequency multiplexer” (PSFM) splits the light into four ports, transforms each part into one of four predetermined polarization states and then combines the light in the different polarization states together. The combined light is then passed through the device under test and combined/interfered with the light propagating through the reference arm at the output of the M-Z interferometer.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: August 7, 2007
    Assignee: JDS Uniphase Inc.
    Inventors: Thomas Friessnegg, Yi Liang, John C. Martinho
  • Patent number: 7203413
    Abstract: A micro-electro-mechanical (MEMs) mirror device for use in an optical switch is disclosed. A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment of the present invention electrostatic charges, which build up on exposed dielectric surfaces causing the mirror's angular position to drift over time, are minimized by positioning the hot and ground electrodes at different levels separated by a vertical surface, and placing the dielectric material on the vertical surface.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: April 10, 2007
    Assignee: JDS Uniphase Inc.
    Inventors: Yuan Ma, Graham McKinnon, John Michael Miller
  • Patent number: 7184665
    Abstract: A chromatic dispersion compensator in a single-pass and a double-pass version is disclosed. In a single-pass version, the compensator has a diffractive grating for spatially separating an input optical signal into spatially spaced frequency components and a MEMS array of separate phase shifters, each for imparting an independent phase shift to a channel containing a range of the spatially spaced frequency components. In a double-pass version, a retroreflector is disposed to effect a double pass of the light beam through the grating and the phase shifters. The arrangement is effecting in reducing chromatic dispersion of the optical signal.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: February 27, 2007
    Assignees: JDS Uniphase Inc., JDS Uniphase Corporation
    Inventors: Valentine N. Morozov, Sheldon McLaughlin, Thomas Ducellier
  • Patent number: 7167650
    Abstract: A method and an apparatus are provided to demultiplex an optical signal having a plurality of channels at a predetermined channel spacing having demultiplexing means with a frequency spacing larger than the predetermined channel spacing for receiving the optical signal and for dividing the optical signal by wavelength into a plurality of wavelength streams broader than the predetermined channel spacing, time domain demultiplexing means for receiving one of the plurality of wavelength streams and for dividing the one of the plurality of wavelength streams into a plurality of time domain demultiplexed wavelength streams, and optical filtering means for demultiplexing one of the plurality of time domain demultiplexed wavelength streams into a single channel. Advantageously, splitting means are provided to split the optical signal into sub-signals before launching them into the demultiplexing means.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: January 23, 2007
    Assignee: JDS Uniphase Inc.
    Inventor: Mark Farries
  • Patent number: 7167613
    Abstract: A micro-electro-mechanical (MEMS) mirror device for use in an optical switch is disclosed. A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment of the present invention the spacing between electrodes is increased without effecting the fill factor of the mirrors by interlacing two sets of tilting platforms, whereby the reflecting portions of both sets of tilting platforms are adjacent one another, while the non-reflecting portions of adjacent platforms are remote from each other.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: January 23, 2007
    Assignee: JDS Uniphase Inc.
    Inventors: John M. Miller, Wenlin Jin, Barrie Keyworth, Pierre D. Wall
  • Patent number: 7162118
    Abstract: A single-sided optical switching device for functioning as a dual switch wherein individual switches share common switching means is disclosed. The individual switches have separate ports and share common switching means formed by a moveable refractor, a single lens and a stationary reflector, wherein the movable refractor is positionable between the lens and the stationary reflector for redirecting light within ports of individual switches. An embodiment of the device provides a single-sided dual 2×2 bypass switch comprising a single lens and a single switching element.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: January 9, 2007
    Assignee: JDS Uniphase Inc.
    Inventor: Paul Colbourne
  • Patent number: 7120364
    Abstract: The invention relates to optical communications using techniques for providing efficient high speed polarization bit interleaving. One common architecture for high-speed time-division-multiplexing employs two modulators having a same bit rate, wherein two separately modulated streams of data bits are combined into a high-speed single serial stream of data bits, instead of providing a single higher-cost higher-speed modulator. The present invention has found with the availability of fast data modulators, that polarization bit interleaving can be employed more efficiently for higher speed data transmission in optical network systems by providing an optical modulator including a single data modulator, rather than multiplexing different data streams from different modulators.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: October 10, 2006
    Assignees: JDS Uniphase Corporation, JDS Uniphase Inc.
    Inventors: George Kovar, Edmond J. Murphy, Richard Habel, Jozef Finak
  • Patent number: 7110635
    Abstract: A micro-electro-mechanical (MEMs) mirror device for use in an optical switch is disclosed. A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment of the present invention specially designed for wavelength switching applications, a greater range of arcuate motion for a mirror mounted thereon is provided by enabling the platform to rotate about two perpendicular axes.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: September 19, 2006
    Assignee: JDS Uniphase Inc.
    Inventors: John Michael Miller, Yuan Ma, Barrie Keyworth, Mohiuddin Mala, Graham McKinnon
  • Patent number: 7110637
    Abstract: A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment the range of angular motion of a MEMs device's platform is increased by reducing the field strength, i.e. the force per unit area, that is sensed at the outer free ends of the platform. Ideally two-step electrodes are provided with a lower step positioned beneath the outer free end of the platform.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: September 19, 2006
    Assignee: JDS Uniphase Inc.
    Inventors: Yuan Ma, Mohiuddin Mala, John Michael Miller
  • Patent number: 7081996
    Abstract: An isolated polarization beam splitter or combiner, for joining light from different inputs into one common port, and for dividing a beam of light into orthogonal polarizations. In both modes of operation, the splitter/combiner provides isolation preventing transmission of light in a reverse direction. As a splitter, a beam of light is separated through a birefringent material into sub-beams of orthogonal polarization components, and each sub-beam is passed through a non-reciprocal polarization rotator to rotate the polarization so that a reflected beam, or other counter-transmitted light cannot return on the same path through the birefringent material to the source. As a combiner, two separate beams of light are launched with known orthogonal polarizations into a first birefringent material, passed through a non-reciprocal polarization rotator and then combined as orthogonal polarizations into a single output port.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: July 25, 2006
    Assignees: JDS Uniphase Corporation, JDS Uniphase, Inc.
    Inventors: Gonzalo Wills, Pierre D. Wall, Kok-Wai Chang, Fahong Jin, Xinglong Wang
  • Patent number: 7039267
    Abstract: The invention provides an optical switch having a pair of opposed optical arrays, each optical array including a fixed mirror and a plurality of independently tiltable mirrors, at least one input port for launching a beam of light into the optical switch, said input port being disposed within a respective optical array, at least two output ports for selectively receiving a beam of light from an optical path between the at least one input port and a selected one of the at least two output ports, said at least two output ports being disposed within a respective opposed optical array, and an ATO element having optical power disposed between the pair of opposed optical arrays. The pair of opposed optical arrays is disposed in respective focal planes of the ATO element. Preferably, the ATO element has a focal length equal to a Rayleigh range of a beam of light incident thereon.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: May 2, 2006
    Assignee: JDS Uniphase Inc.
    Inventors: Thomas Ducellier, Ian Powell, Stephen David Shaw
  • Patent number: 7014326
    Abstract: A wavelength blocker including an input port for launching an input beam of light, first dispersing means for dispersing the input beam of light according to wavelength, an array of independently addressable elements for selectively blocking a portion of the dispersed beam of light, second dispersing means for receiving the passed dispersed beam of light and for producing a single multiplexed beam of light therefrom, and an output port for transmitting a modified output beam of light. The array of independently addressable elements are designed such that the wavelength blocker is capable of blocking a variable number of non-consecutive channels without significantly affecting the unblocked channels.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: March 21, 2006
    Assignees: JDS Uniphase Corporation, JDS Uniphase Inc.
    Inventors: David John Danagher, Thomas Ducellier, Robert I. MacDonald, Jasvinder Obhi, Barrie Keyworth, Paul H. Beckwith, W. John Tomlinson
  • Patent number: 7007835
    Abstract: A method for solder bonding a photodiode or an array of photodiodes to a substrate, the photodiode(s) tilted at a predetermined angle, uses a pair solder bumps placed on a photodiode chip opposite a corresponding pair of solder pads placed on the substrate. When the photodiode chip is placed on the substrate, with the solder bumps therebetween, the solder is melted and undergoes a reflow over the surface of the pads. The shape of the pads and the location of the solder bumps on the pads causes the surface tension of the solder to tilt the chip by pulling it to one side.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: March 7, 2006
    Assignees: JDS Uniphase Corporation, JDS Uniphase Inc.
    Inventors: Philip Deane, Neil Teitelbaum
  • Patent number: 7010188
    Abstract: A micro-electro-mechanical (MEMs) mirror device for use in an optical switch is disclosed. A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment of the present invention specially designed for wavelength switching applications, a greater range of arcuate motion for a mirror mounted thereon is provided by enabling the platform to rotate about two perpendicular axes.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: March 7, 2006
    Assignee: JDS Uniphase Inc.
    Inventors: John Michael Miller, Yuan Ma, Barrie Keyworth, Wenlin Jin, David R. Hess
  • Patent number: 6983090
    Abstract: A high-resolution tunable optical filter uses a dispersive element in a double pass configuration. The double pass configuration is provided by a reflective quarter-wave plate that conveniently reduces polarization dispersion loss (PDL) of the filter. The filter also includes a fibre tube for supporting an input optical fibre and an output optical fibre, and a lens having an optical axis, which is disposed such that a focal point thereof is substantially at one of the input and output optical fibres. To provide increase resolution the filter is tuned by rotating the reflective quarter-wave plate. To provide high power capabilities the fibre jackets of the input and output fibres are optionally stripped back. To provide a symmetrical spectral response the fibre tube is optionally mounted at an angle to the optical axis of the lens.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: January 3, 2006
    Assignee: JDS Uniphase Inc.
    Inventors: John Weber, Xiang Zhu, Shane H. Woodside
  • Patent number: RE39934
    Abstract: An optical attenuator for attenuating a collimated beam of light propagating along an optical path while preserving the composition of polarization of the collimated beam of light is disclosed. The optical attenuator comprises a beam attenuator for attenuating a portion of the collimated beam of light when a portion of the beam attenuator is disposed within the optical path. The beam attenuator has a cross section along a plane perpendicular to the direction of propagation of the collimated beam of light of the portion of the attenuator in the shape of a wedge. The attenuation is varied using a controller for moving the beam attenuator in order to vary a size of the portion of the wedge within the optical path.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: December 4, 2007
    Assignee: JDS Uniphase, Inc.
    Inventors: John O. Smiley, Robert Laflamme