Patents Assigned to JDS Uniphase Corporation
  • Mesa-type photodetectors with lateral diffusion junctions
    Patent number: 8030684
    Abstract: The present invention relates to a stable mesa-type photodetector with lateral diffusion junctions. The invention has found that without resorting to the complicated regrowth approach, a simple Zn diffusion process can be used to create high-quality semiconductor junction interfaces at the exposed critical surface or to terminate the narrow-bandgap photon absorption layers. The invention converts the epi material layers near or at the vicinity of the etched mesa trench or etched mesa steps into a different dopant type through impurity diffusion process. Preferably the diffused surfaces are treated with a subsequent surface passivation. This invention can be applied to both top-illuminating and bottom-illuminating configurations.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: October 4, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Syn-Yem Hu, Zhong Pan
  • Scalable cladding mode stripper device
    Patent number: 8027555
    Abstract: A cladding mode stripper for stripping cladding modes from an optical fiber is disclosed. The cladding mode stripper includes a reflective base and a block of a transparent material disposed on the reflective base. The block of the transparent material has a groove in its bottom surface for the fiber. The fiber is thermally coupled to the base and optically coupled to the groove in the block, for example using an index matching gel. The cladding mode light is reflected from the reflective base and is absorbed in a cover enclosing the block. An additional thin block of transparent heat-conductive material can be placed between the fiber and the reflective base, to prevent the index matching gel from contacting the reflective surface of the base.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: September 27, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Dahv Kliner, Derek A. Tucker, Juan Lugo
  • Passive network tap for tapping network data
    Patent number: 8027277
    Abstract: A passive full-duplex bidirectional ZPL tap includes first and second network ports and first and second tap ports. A passive signal separator is configured to receive a data stream from at least one of the first or second network port and pass through the data stream and a first signal portion comprising at least the first signal component and a second signal portion comprising at least the second signal component. A first receive only physical interface device (Phy) is configured to receive the first signal portion from the signal separator and provide the first portion to the first tap port and a second receive only Phy is configured to receive the second signal portion from the signal separator and provide the second signal portion to the second tap port.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: September 27, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Greta L. Light, James D. McVey, N. Anders Olsson, A. Michael Lawson
  • Printed magnetic ink overt security image
    Patent number: 8025952
    Abstract: A security image and method of forming said image is disclosed wherein a substrate having an image or indicia thereon is coated with a dilute solution of pigment flakes in an ink or paint. The flakes are subsequently aligned in a magnetic field and are fixed after the field is applied. Most or all of the flakes in a region are aligned so as to be partially upstanding wherein their faces are essentially parallel. Coating the image with flakes yields a latent image which can be clearly seen at a small range of predetermined angles.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: September 27, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Vladimir P. Raksha, Cornelis Jan Delst, Paul G. Coombs, Charles T. Markantes, Alberto Argoitia
  • Communications system, apparatus for creating a sub-channel and method therefor
    Patent number: 8009557
    Abstract: A communications apparatus includes an input for receiving a data stream being transmitted from a first network node to a second network node using a main channel. A processing resource of the communications apparatus identifies data signifying an idle period within the data stream and determines whether the idle period is at least a suitable minimum duration to support initiating transmission of sub-channel data in place of at least part of the data signifying the idle period. Further, the processing resource is arranged to identify when the idle period is not of the suitable minimum duration and a need arises to transmit the sub-channel data within a predetermined period of time. In such circumstances, the processing resource sends a flow control message upstream to the first network node to halt transmissions therefrom, thereby generating the idle period of at least the suitable minimum duration.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: August 30, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Martin Curran-Gray, Slawomir K. Ilnicki, Takashi Hidai
  • Photodiode and method of fabrication
    Patent number: 8008688
    Abstract: The present invention provides a highly reliable photodiode, as well as a simple method of fabricating such a photodiode. During fabrication of the photodiode, a grading layer is epitaxially grown on a top surface of an absorption layer, and a blocking layer, for inhibiting current flow, is epitaxially grown on a top surface of the grading layer. The blocking layer is then etched to expose a window region of the top surface of the grading layer. Thus, the etched blocking layer defines an active region of the absorption layer. A window layer is epitaxially regrown on a top surface of the blocking layer and on the window region of the top surface of the grading layer, and is then etched to form a window mesa.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: August 30, 2011
    Assignee: JDS Uniphase Corporation
    Inventor: Syn-Yem Hu
  • DC coupled driver with active termination
    Patent number: 8009709
    Abstract: A DC coupled driver is described for modulating a vertical cavity surface emitting laser at high speeds with active termination. High speed and low total power dissipation is achieved by improving the driver immunity to pulse reflections, which can arise due to impedance mismatch between the driver output impedance and the VCSEL impedance. The rise and fall times of the driver may be adjusted for particular applications. The driver may be fabricated using a choice of bipolar, NMOS and PMOS technologies.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: August 30, 2011
    Assignee: JDS Uniphase Corporation
    Inventor: David A. Nelson
  • BIAS CONTROL IN AN OPTICAL MODULATOR AND TRANSMITTER
    Publication number: 20110206384
    Abstract: An apparatus and method for controlling bias in an optical modulator is disclosed. The method is particularly applicable to controlling multi-wavelength modulators and wavelength-tunable transmitters. At a calibration stage, a desired optical performance of the modulator is achieved, and an amplitude of a peak-to-peak variation of the output optical signal at a pre-determined amount of dither is stored in a memory as a reference. At operating stage, a controller of the optical modulator adjusts a bias voltage of the modulator until the measured peak-to-peak optical signal variation matches the reference value stored at the calibration stage. For multi-wavelength modulators and tunable transmitters, the calibration is repeated at each wavelength, and corresponding peak-to-peak optical signal variations are stored in the memory.
    Type: Application
    Filed: February 23, 2011
    Publication date: August 25, 2011
    Applicants: JDS Uniphase Corporation
    Inventors: Yuxin ZHOU, Hock Gin Lim
  • Systems and methods for generating network messages
    Patent number: 8005886
    Abstract: A networking system may include a traffic generator. The traffic generator may include a scripting module configured to create a script. The traffic generator may execute the script to send and/or receive network messages within the networking system, which may help test one or more components of the networking system. The script may include one or more entries. An entry may be configured to instruct the traffic generator to send one or more network messages.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: August 23, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Paul G. Jacobsen, Scott A. Guillaudeu, David R. Freeman, Sridhar Krishnamurthy
  • Displaying eye-diagram and digital diagnostic data using network analyzers
    Patent number: 8005133
    Abstract: Methods and apparatuses for displaying information for analyzing a signal transmitted in a communication system. The method can include displaying digital diagnostic data received from a monitoring interface of a transceiver. An eye-diagram for the signal is also displayed. The digital diagnostic data, network protocol analysis results, and/or the eye-diagram can be selectively displayed using a combined unit or stand alone units. Additionally, results of network protocol analysis can also be displayed with the digital diagnostic data and eye diagram.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: August 23, 2011
    Assignee: JDS Uniphase Corporation
    Inventor: Dale Trenton Smith
  • Method and apparatus for depicting throughput on TCP and RLC layer of UMTS system
    Patent number: 8004999
    Abstract: A method of creating a graphical display illustrating throughput of data across a protocol layer. A first graphical indication is displayed which illustrates of the number of data units received, by a protocol layer, for each of a plurality of transmission intervals. A second graphical indication is displayed which illustrated the number of data units output by the protocol layer for each of a plurality of transmission intervals.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: August 23, 2011
    Assignee: JDS Uniphase Corporation
    Inventor: Juergen Voss
  • Historical data management
    Patent number: 8001539
    Abstract: An apparatus and method for managing historical data includes receiving a compiled application program and a declarative specification. An enhancer generates one or more representations of at least one data class defined in the application program based on at least one historical metatag and historical metadata associated therewith from the declarative specification. The enhancer also generates configuring instructions for configuring a database in accordance with the storage representation(s), an enhanced compiled application program including instructions for accessing data in the configured database, and a historical updater program for updating the data in the database based on the historical metadata.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: August 16, 2011
    Assignee: JDS Uniphase Corporation
    Inventor: Kevin Mitchell
  • Contrast compensation of microdisplay panels including a high order waveplate
    Patent number: 7999895
    Abstract: A contrast compensator for improving the panel contrast of liquid crystal (LC) microdisplays having a high-order waveplate configured as an O-plate and supporting a thin film transistor layer is provided. The contrast compensator includes a counter high-order waveplate configured as an O-plate, which has a birefringence opposite in sign to a birefringence of the thin film transistor substrate.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: August 16, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Kim Leong Tan, Nada A. O'Brien
  • OPTICAL TRANSCEIVER WITH POLARITY INVERSION
    Publication number: 20110188863
    Abstract: An optical transceiver that includes a modification that prevents interoperability with standard transceivers, while enabling them to work in the same slots and equipment as standard transceivers, provided that they are interoperating with a similarly modified transceiver on the other end of the optical link. Ideally, the polarity of the data in both the transmit and receive direction is inverted resulting in valid data for a link when a pair of modified modules are used and invalid data when a modified module is used with a standard fiber optic transceiver. The function is otherwise transparent to the host equipment.
    Type: Application
    Filed: January 4, 2011
    Publication date: August 4, 2011
    Applicants: JDS Uniphase Corporation
    Inventors: Thomas Beck MASON, Wei-Chiao Fang
  • Optical network test access point device
    Patent number: 7986884
    Abstract: An optical network test access point (“TAP”) device. In one example embodiment, an optical network TAP device includes a printed circuit board and a plurality of optical receiver modules. The printed circuit board includes a microprocessor, a multiplexer connected to the microprocessor, and a plurality of post amplifiers connected to the multiplexer. Each optical receiver module includes one or more ROSAs. Each ROSA is connected to the multiplexer through one of the plurality of post amplifiers.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: July 26, 2011
    Assignee: JDS Uniphase Corporation
    Inventors: Stephen Nelson, Greta L. Light
  • System and method for constructing transactions from electronic content
    Patent number: 7984187
    Abstract: A system and method for constructing transactions by requesting content from content providers, such as web sites, according to automatically generated content references. From that content and according to user-defined rules, the system can generate other content references, and request and access further content. Statistics can be maintained for each content access. The system and method can be used to test electronic networks, such as wireless communications networks.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: July 19, 2011
    Assignee: JDS Uniphase Corporation
    Inventor: Stephen C. Booth
  • APPARATUS FOR ORIENTING MAGNETIC FLAKES
    Publication number: 20110168088
    Abstract: A printing apparatus includes a magnetic rotatable roller with a smooth even outer surface for aligning magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security features on high-value documents, such as bank notes. Magnetic flakes in the ink are aligned using magnetic portions of the roller, that can be formed by permanent magnets embedded in a non-magnetic roller body, or selectively magnetized portions of a flexible magnetic cover of the roller. In some embodiments, the roller is assembled for a plurality of interchangeable sections, which can include spinning magnets. Selected orientation of the magnetic pigment flakes can achieve a variety of illusive optical effects that are useful for decorative or security applications.
    Type: Application
    Filed: March 28, 2011
    Publication date: July 14, 2011
    Applicant: JDS Uniphase Corporation
    Inventors: Vladimir P. Raksha, Jay M. Holman, Paul G. Coombs, Charles T. Markantes, Roger W. Phillips
  • Wireless “whooper” system for consolidating wireless communication access points and client stations and providing differentiated wireless services
    Patent number: 7974248
    Abstract: A Wireless Whooper system for use in wireless networks is provided with a collection of wireless client stations arranged to transmit and receive wireless streams of information, and wireless Access Points (APs) arranged to wirelessly link with the wireless client stations, each supporting a group of wireless client stations; and a supervisory processing unit (SPU) arranged to monitor and dynamically switch between available wireless APs, forward and transmit streams of information through the wireless networks. Such a supervisory processing unit (SPU) can be installed as a separate control device or integrated within each wireless AP to handle the dynamic switching and routing of streams of information between available wireless APs within the system.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: July 5, 2011
    Assignee: JDS Uniphase Corporation
    Inventor: Farouk M. Zanaty
  • OPTICAL WAVEGUIDE MODULATOR
    Publication number: 20110158576
    Abstract: The invention relates to waveguide optical modulators wherein two or more waveguides are modulated with specific modulation strengths using a single straight signal electrode or a single multi-segment signal electrode. Modulation strengths for each of a plurality of waveguides modulated by a single multi-segment electrode are matched over a wide modulation frequency range. Linearized output characteristics with respect to second and third order distortions arc achieved in one aspect of the invention.
    Type: Application
    Filed: December 29, 2010
    Publication date: June 30, 2011
    Applicant: JDS Uniphase Corporation
    Inventors: Karl KISSA, Gregory J. McBRIEN
  • OPTICAL MODULE WITH FIBER FEEDTHROUGH
    Publication number: 20110158594
    Abstract: A molded ceramic or glass ferrule has at least one longitudinal passage, which enables an optical fiber feed through, sealed into a metal housing with glass solder. The metal material in the housing has a slightly higher coefficient of thermal expansion (CTE) than the ferrule material and the sealing glass so that hermetic seal is maintained by a compression stress applied to the ferrule and sealing glass by the housing at operating conditions. When the housing has to be fabricated from a low CTE material, e.g. metal or ceramic, a metal sleeve and stress relief bracket is used to apply the compression stress.
    Type: Application
    Filed: December 29, 2009
    Publication date: June 30, 2011
    Applicants: JDS Uniphase Corporation
    Inventors: Prasad YALAMANCHILI, Xiangdong Qiu, Reddy Raju, Jihua Du