Patents Represented by Attorney, Agent or Law Firm Paul Davis
  • Patent number: 6922419
    Abstract: A diode-pumped solid-state laser has been invented that provides long Q-switched pulses at high repetition rate with high stability. The laser incorporates Nd:YVO4 as the gain medium.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: July 26, 2005
    Assignee: Spectra Physics Lasers, Inc.
    Inventors: William L. Nighan, Jr., Mark S. Keirstead, Tracy W. Vatter
  • Patent number: 6890474
    Abstract: A method and system are described aimed at substantially increasing the lifetime of sensitive optical elements subjected to high power laser radiation. The lifetime enhancement is accomplished by spatially distributing the laser beam spots both globally and locally according to algorithms that are custom tailored to the subject element as well as the system and application needs. The methods of the invention are particularly well-suited to non-linear crystals used to convert radiation from high repetition rate, diode-pumped laser systems into the UV spectral range, where lifetime requirements are particularly challenging. The methods of the invention further enable effective utilization of available experimental data characterizing the element's performance in combination with a stored library of preferred spot scanning patterns that may be executed on the surface of the element according to the selected algorithm.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: May 10, 2005
    Assignee: Spectra Physics, Inc.
    Inventors: Lukas Gruber, Norman Hodgson, Hanna J. Hoffman, Joerge Angstenberger
  • Patent number: 6826164
    Abstract: A network includes a plurality of antennas coupled to a plurality of base stations. The network can be optical or constructed with RF microwave links. The antennas and base stations are configured to transmit and receive digital signals representing cellular signals and the digital signals are exchanged over the network. A plurality of links couple the plurality of antennas and the plurality of base stations. At least one link of the plurality of links provides multiple transmission paths between at least a portion of the base stations and at least a portion of the antennas.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: November 30, 2004
    Assignee: NEXTG Networks
    Inventors: Sanjay Mani, David Cutrer
  • Patent number: 6826163
    Abstract: A network is provided that includes a plurality of antennas coupled over the network to a plurality of base stations. The network can be optical or constructed with RF microwave links. The base stations are configured to provide cellular transmission. A plurality of links couple the plurality of antennas and the plurality of base stations. At least one link of the plurality of links provides multiple transmission paths between at least a portion of the base stations with at least a portion of the antennas.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: November 30, 2004
    Assignee: NEXTG Networks
    Inventors: Sanjay Mani, David Cutrer
  • Patent number: 6822978
    Abstract: A laser apparatus includes a modelocked laser system with a high reflector and an output coupler that define an oscillator cavity. An output beam is produced from the oscillator cavity. A gain medium and a modelocking device are positioned in the oscillator cavity. A diode pump source produces a pump beam that is incident on the gain medium. A second harmonic generator is coupled to the oscillator cavity. A third harmonic generator that produces a UV output beam, is coupled to the second harmonic generator. A photonic crystal fiber is provided with a proximal end coupled to the laser system. A delivery device is coupled to a distal portion of the photonic crystal fiber.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: November 23, 2004
    Assignee: Spectra Physics, Inc.
    Inventors: James D. Kafka, David E. Spence
  • Patent number: 6812152
    Abstract: A method to obtain contamination free surfaces of a material chosen from the group comprising GaAs, GaAlAs, InGaAs, InGaAsP and InGaAs at crystal mirror facets for GaAs based laser cavities. The crystal mirrors facets are cleaved out exposed to an ambient atmosphere containing a material from the group comprising air, dry air, or dry nitrogen ambients. Any oxides and other foreign contaminants obtained during the ambient atmosphere exposure of the mirror facets are removed by dry etching in vacuum. Thereafter, a native nitride layer is grown on the mirror facets by treating them with nitrogen.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: November 2, 2004
    Assignee: Comlase AB
    Inventors: L. Karsten V. Lindström, N. Peter Blixt, Svante H. Söderholm, Anand Srinivasan, Carl-Fredrik Carlström
  • Patent number: 6779726
    Abstract: A production operation is controlled by electronically scanning and reading printed information at intervals along a component tape. The printed information is continuously scanned and read from the carrier tape portion or the cover tape portion of the component tape as components are removed from the component tape during a production operation. In a production facility, the data from many component tapes is transmitted simultaneously to a production control system where all data is processed. The processed data is used to automatically control a production operation by using the printed information to control resources of the production operation, resources including component inventory, equipment, and facilities.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: August 24, 2004
    Assignee: Solectron Corporation
    Inventor: Mark Easton
  • Patent number: 6749624
    Abstract: A fluid delivery apparatus for introducing a fluid cooling media to a skin surface includes a template with a skin interface surface. An energy delivery device is coupled to the template. A fluid cooling media introduction member is coupled to the template. Resources controllably deliver energy from the energy delivery device to the skin surface. In a related embodiment, the resources are configured to controllably deliver the flowable cooling media to the introduction member. In another embodiment, a sensor is coupled to the resources and to the skin surface.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: June 15, 2004
    Inventor: Edward W. Knowlton
  • Patent number: 6734453
    Abstract: A photonic device includes a silicon semiconductor based superlattice. The superlattice has a plurality of layers that form a plurality of repeating units. At least one of the layers in the repeating unit is an optically active layer with at least one species of rare earth ion.
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: May 11, 2004
    Assignee: Translucent Photonics, Inc.
    Inventors: Petar B. Atanackovic, Larry R. Marshall
  • Patent number: 6733490
    Abstract: A method of monitoring and controlling the sub-threshold laser treatment of a patient's retina. Sensors are located on a patient to measure focal electroretinograms (FERG). A stimulating beam is delivered onto the patient's retina. A pre-treatment FERG signal is collected. Treatment FERG signals are collected while treating the retina with a sub-threshold laser treatment. A difference is determined between the pre-treatment and treatment FERG signals. The difference is used to control the termination of the treatment.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: May 11, 2004
    Assignee: Iridex Corporation
    Inventors: Benedetto Falsini, Giorgio Dorin
  • Patent number: 6734387
    Abstract: A micro-machining apparatus includes a mode-locked, infrared laser system with a high reflector and an output coupler that define an oscillator cavity which produces an output beam. A gain medium and a mode locking device are positioned in the oscillator cavity. A diode pump source produces a pump beam that is incident on the gain medium. A second harmonic generator is coupled to the oscillator cavity. A third harmonic generator is coupled to the second harmonic generator and produces a UV output beam. An output beam directing apparatus directs the output beam to a polymeric surface of an article. At least a portion of the polymeric material is micro-machined by the output beam.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: May 11, 2004
    Assignee: Spectra Physics Lasers, Inc.
    Inventors: James D. Kafka, Mingwei Li
  • Patent number: 6697390
    Abstract: A laser system includes a high reflector and an output coupler that define a laser oscillator, which produces a fundamental beam. A harmonic generator is positioned to receive at least a portion of the fundamental beam and produce a harmonic beam. The harmonic generator is configured to operate at a temperature selected to provide a least amount of change of a selected parameter of the harmonic beam for the longest period of time. Harmonic beam parameters can include the size and location of the harmonic beam waist, and the divergence of the harmonic beam.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: February 24, 2004
    Assignee: Spectra Physics Lasers, Inc.
    Inventors: James D. Kafka, Alan B. Petersen, Karl Markert
  • Patent number: 6688071
    Abstract: An anchor rod having at least one section provided with ribs or other raised portions or profiling and a threaded section at one or both ends, and having a variable transition section between the threaded section(s) and the profiled section; and a method of making the anchor rod.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: February 10, 2004
    Assignee: Connector Vinkeveen B.V.
    Inventors: Hermanus Johannes Josef Evers, Robertus Cornelis Maria Van Rijn
  • Patent number: 6671425
    Abstract: The present invention relates to an integrated light source having first and second optical waveguides defining a first optical coupling region for coupling light therebetween. At least one of the optical waveguides includes a gain medium configured to emit light upon irradiation. The light source also includes a first acoustic wave source to subject the first optical coupling region to acoustic waves having a longitudinal frequency &ohgr;AC1, whereby a frequency of light propagating along one of the first and second waveguides differs from a frequency of light propagating along the other waveguide by an amount by an amount &ohgr;AC1.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: December 30, 2003
    Assignee: CeLight
    Inventors: Jacob B. Khurgin, Nadejda Reingand, Isaac Shpantzer, Israel Smilanski, Pak Shing Cho
  • Patent number: 6665328
    Abstract: An optically pumped laser has a gain medium positioned inside of an optical resonator cavity and disposed about a resonator optical axis. An optical pumping source is positioned outside of the optical resonator cavity. A reflective coupler with a coupler body, and an interior volume passing therethrough is positioned proximal to the optical pumping source. Light from the pumping source passes into an entrance aperture of the reflective coupler to an exit aperture of the reflective coupler positioned distal to the optical pumping source. The interior volume of the reflective coupler is bounded by a reflective surface, an entrance aperture and the exit aperture, and is substantially transparent to radiation from the optical pumping source. The reflective surface has a high reflectivity matched to radiation from the optical pumping source.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: December 16, 2003
    Assignee: Spectra Physics, Inc.
    Inventors: Jason D. Henrie, William L. Nighan, Jr.
  • Patent number: 6551310
    Abstract: An ablation catheter system and method of use is provided to endoscopically access portions of the human esophagus experiencing undesired growth of columnar epithelium. The ablation catheter system and method includes controlled depth of ablation features and use of either radio frequency spectrum, non-ionizing ultraviolet radiation, warm fluid or microwave radiation, which may also be accompanied by improved sensitizer agents.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: April 22, 2003
    Inventors: Robert A. Ganz, Brian D. Zelickson, Roger A. Stern
  • Patent number: 6540391
    Abstract: An optical system is provided for use with a target site and includes a laser source producing an output beam and a reflector. A beam splitter is positioned to receive the output beam and splits the output beam into a first beam incident on the reflector and a second beam incident on at least one point of the target site. The reflector is adjustably positioned and movable along the reference optical path moveable along the reference optical path to change a length of the reference optical path.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: April 1, 2003
    Assignee: Iridex Corporation
    Inventors: Paolo Lanzetta, Giorgio Dorin
  • Patent number: 6535541
    Abstract: A vertical cavity apparatus includes first and second mirrors, a substrate, first and second active regions and a plurality of individual active regions. Each of an individual active region is positioned between the first and second active regions. A first oxide layer is positioned between the first mirror and the second mirror. A plurality of tunnel junctions are positioned between the first and second mirrors.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: March 18, 2003
    Assignee: Bandwidth 9, Inc
    Inventors: Julien Boucart, Constance Chang-Hasnain, Michael Jansen, Rashit Nabiev, Wupen Yuen
  • Patent number: 6532096
    Abstract: A Finite Impulse Response (FIR) filter for suppressing ringing in tunable, or adjustable, members of MEMS devices is described. In embodiments of the invention, the FIR filter includes staggered proportional plus delay filters, or posicast filters. The FIR filter of the present invention is applicable to an adjustable mechanical member in a MEMS device which can be modeled as single mode second order system characterized by a resonance frequency &ohgr;0 and damping constant &zgr;<<1, i.e., a highly underdamped, single mode, second order system.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: March 11, 2003
    Assignee: Bandwidth 9, Inc.
    Inventors: Bereket Berhane, Dan Guthrie, David Walker
  • Patent number: D470816
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: February 25, 2003
    Assignees: Spectra Physics, Inc., Laser Drive, Inc.
    Inventors: Philip C. Thackray, Micki Downey