Patents Examined by John Ngo
  • Patent number: 5832150
    Abstract: A fiber optic coupler for coupling an asymmetrical beam such as provided by a laser diode into a fiber optic cable. The coupler comprises at least one fiber optic cable having a longitudinally-formed approximately flat entrance facet and a cylindrical curved reflective surface formed on a first end. The curved reflective surface defines a line focus proximate to the entrance facet. A support structure situates the entrance facet proximate to the laser diode so that the line focus is approximately aligned with the narrow output aperture of the laser diode. The fiber optic cable may have any cross-section, such as circular, rectangular, or square. The fiber optic cable also includes a main body for receiving and transmitting the coupled laser radiation, and an output end having an approximately flat exit facet for outputting the laser radiation.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: November 3, 1998
    Assignee: Laser Power Corporation
    Inventor: Graham W. Flint
  • Patent number: 5832153
    Abstract: An optical system is provided for coupling light from one optical waveguide to another. By offsetting the parallel optical axes of two GRIN lenses by a minimum of 50 .mu.m there is a significant reduction in unwanted effects from reflections. Furthermore etalon effects present in many optical coupling systems having parallel inwardly facing end-faces are reduced. The invention obviates the costly solution of for slanting one of the inwardly end-faces of the lens.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: November 3, 1998
    Inventor: Gary Stephen Duck
  • Patent number: 5832165
    Abstract: A step-gradient composite waveguide for evanescent sensing in fluorescent binding assays comprises a thick substrate layer having one or more thin film waveguide channels deposited thereon. In one embodiment, the substrate is silicon dioxide and the thin film is silicon oxynitride. Specific binding molecules having the property of binding with specificity to an analyte are immobilized on the surface of the thin film channels. In preferred embodiments, the composite waveguide further includes light input coupling means integrally adapted to the thin film channels. Such light coupling means can be a grating etched into the substrate prior to deposition of the thin film, or a waveguide coupler affixed to the upper surface of the thin film. The waveguide coupler has a thick input waveguide of high refractive index which receives the laser light through one end and propagates it by total internal reflection.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: November 3, 1998
    Assignee: University of Utah Research Foundation
    Inventors: W. Monty Reichert, James N. Herron, Douglas A. Christensen, Hsu-Kun Wang
  • Patent number: 5828801
    Abstract: In a light signal switching device including an input optical fiber via which a light signal is received. There are provided first and second output optical fibers each being doped with a rare-earth element, first and second pumping sources inputting exciting lights to the first and second output optical fibers, a drive controller driving the first and second pumping sources so that one of the exciting lights is applied to one of the first and second output optical fibers via which the light signal received from the input optical fiber is output.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: October 27, 1998
    Assignee: Fujitsu Limited
    Inventor: Hiroshi Sakamoto
  • Patent number: 5825962
    Abstract: An optical fiber splice housing is provided for connection to a distribution frame adjacent to the rear of an optical fiber raceway unit. The splice housing comprises a cabinet having a front end defining a cabinet height and a cabinet width and a rear end defining a rear facing opening. The front end of a cabinet is adapted for connection to a distribution frame adjacent the rear side of the raceway member, and the cabinet height is not greater than the raceway height while the cabinet width is not greater than the raceway width. The splice housing can therefore be connected to a distribution frame adjacent to the rear side of a raceway unit without using additional vertical space in the frame and access to a splice tray mounted on the splice tray shelf can be had through the rear facing opening of the cabinet.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: October 20, 1998
    Assignee: Siecor Corporation
    Inventors: Mark D. Walters, Kevin L. Morgan, Robert W. Dennis
  • Patent number: 5825955
    Abstract: A diversion connector is disclosed for mating with an optical fiber of an associated fiber optic transmission means. The connector includes a body having an end face for mating with the associated fiber optic transmission means, the end face traversing the optic axis. A fiber section is mounted in the body and includes a front fiber end and a rear fiber end. The front fiber end is adapted for mating with an end of the optical fiber of the associated fiber optic transmission means. The rear fiber end is at an angle to the optic axis to prevent light energy transmitted by the optical fiber from being reflected back toward the fiber and to protect an operator's eyes from the transmitted light energy.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: October 20, 1998
    Assignee: Molex Incorporated
    Inventors: Scot A. Ernst, Igor Grois, Aleksandr Kats, Ilya Makhlin, Michael J. Pescetto
  • Patent number: 5825950
    Abstract: An optical isolator for passing light in a forward direction with greater intensity than reverse directed light, is provided. The device includes a conventional isolating means having at least two birefringent crystals, and a non-reciprocal rotating element disposed between the two crystals. The isolating means is disposed between two substantially collimating GRIN lenses, and a thermally expanded core (TEC) output optical fiber is coupled to one of the two lenses and an optical fiber having a thermally expanded core optically coupled to the other of the two collimating lenses. Unwanted reflected incident light is poorly coupled into the input TEC optical fiber due the angle of incidence at the fiber end.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: October 20, 1998
    Assignee: JDS Fitel Inc.
    Inventor: Yihao Cheng
  • Patent number: 5822472
    Abstract: The invention relates to a process for determing lumnescence with a planar dielectric optical sensor platform which consists of a transparent substrate to which a thin transparent waveguiding layer is applied, which sensor platform is provided with a coupling grating for the input-coupling of the excitation light and the refractive index of the substrate is lower than the refractive index of the waveguiding layer, by briging a liquid sample as superstrate into contact with the layer, and measuring the luminescence produced by substances having luminescence properties in the sample, or by substances having luminescence properties immobilized on the layer, optoelectronically. The invention also relates to the use of the process in quantitative affinity sensing and to the use thereof for the quantitative determination of luminescent constituents in optically turbid solutions, and to sensor platform for carrying out the process.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: October 13, 1998
    Assignee: Novartis Corporation
    Inventors: Burkhard Danielzik, Gert Ludwig Duveneck, Martin Heming, Dieter Neuschafer, Johannes Segner
  • Patent number: 5822482
    Abstract: A method of packaging a fiber optic coupler formed of a plurality of optical fibers having a coupled region at which electromagnetic waves are coupled therebetween and at least one lead portion extending from the coupled region. A protective body is provided having a receiving space therein. The coupled region and a portion of the at least one lead portion are positioned within the receiving space. A slack in the at least one lead portion is created by affixing two points of the portion of the at least one lead portion to said protective body. The slack is created between the two points.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: October 13, 1998
    Assignee: Honeywell Inc.
    Inventors: Randal A. Atkeisson, Karl A. Fetting
  • Patent number: 5822484
    Abstract: An optical groundwire includes an organizer made of glass fibers held together in a matrix. A plurality of core tubes containing optical fibers are retained within the organizer. A plurality of conductors are wrapped about the organizer to form a sheath.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: October 13, 1998
    Assignee: Lucent Technologies Inc.
    Inventor: Candido John Arroyo
  • Patent number: 5822473
    Abstract: An optical device for sensing properties in an environment such as the presence of a substance or chemical in the zone to be monitored using optical components integrated on a microchip base or substrate. A preferred embodiment introduces a method for fabricating a miniature microchip chemical sensor by integrating a GaAs LED 14 with a polyimide waveguide 48 and a silicon photosensor 16 on the same chip. Light 18 is emitted at the edge of the GaAs LED 14. A portion of the light propagates is detected by a PIN diode 16. A chemical sensitive material 50 is coated on top of a polyimide waveguide 48. When the gas or chemical to which the material is sensitive appears, the light transmitted from the polyimide to air increases, thus the total signal sensed by the photodetector decreases, whereby the change in light signal indicates detection.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: October 13, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory Anton Magel, Terrance Gus McDonald, Jau-Yuann Yang, Han-Tzong Yuan
  • Patent number: 5818986
    Abstract: An optical planar waveguide wavelength division demultiplexer for separating multiple wavelengths received in a wavelength division multiplexed communication system is disclosed, with each wavelength launched into a separate output waveguide channel. Wavelength separation is performed by wavelength-selective angular back-reflection from Bragg gratings, which are fabricated into the channel junctions of the planar germania-enriched silica waveguide by applying short wavelength light past a mask. A second Bragg reflection, reflecting the same wavelength as the first Bragg grating, is introduced into each output channel circuit, in order to attenuate residual backscattered light at non-desired wavelengths. The Bragg grating is extended beyond the channel junctions into the merged channel for greater reflectivity, if required, for the double Bragg grating geometry.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: October 6, 1998
    Inventors: Charles K. Asawa, Mike H. Asawa, Jane K. Asawa
  • Patent number: 5818991
    Abstract: An optical coupling arrangement consist of a pair of strip-type optical waveguide end segments extending alongside one another and having ends arranged at a small distance from each other so that crosstalk can occur. In order to suppress the crosstalk at a point spaced from the ends of each of the end segments, the segments are arranged so that the distance from one another increases from the distance at the end as the distance from the end along said segments increases.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: October 6, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Reinhard Maerz, Gerhard Heise
  • Patent number: 5818990
    Abstract: An encapsulated optocomponent (1) comprises a single-crystal silicon wafer (3) and waveguides (9) located thereon, which at least partly are manufactured by means of process methods taken from the methods for manufacturing electronic integrated circuits. The waveguides (9) extend from an edge of the optoelectronic component (1) to an optoelectronic, active or passive component (11) attached to the surface of the silicon wafer (3). Over the region for connecting the waveguides (9) to the optoelectronic component (11) a transparent plastics material is molded (17), for instance an elastomer, having a refractive index adjusted to improve the optical coupling between the waveguides (9) and the optoelectronic component (11). The molding (17) covers advantageously all of said component (11) to also reduce thermal stresses between it and an exterior, protective layer (19) of a curable plastics material. The molded layer (17) can also cover the whole area of the waveguides (9) to form an upper cladding thereof.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: October 6, 1998
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Odd Steijer, Paul Eriksen, Hans Moll, Jan .ANG.ke Engstrand, Goran Palmskog, Mats Janson, Pia Tinghag
  • Patent number: 5818998
    Abstract: A lightweight display system (10) includes an output matrix (34) of output terminals (28) of optical conductors (30) supported on a preferably flexible substrate (16) by terminal housings (20). Optical conductors (30) are collated into an input matrix (34) that receives light containing a source image (39) from projector (40). Light propagates through optical conductors (30) and exits output terminals (28) to form an enlarged display image (31) that corresponds to the source image. Preferred embodiments of display screen (12) are collapsible and facilitate transportation and reassembly.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: October 6, 1998
    Assignee: Inwave Corporation
    Inventors: Laura Lee Harris, Jeff Olsen
  • Patent number: 5815614
    Abstract: An improved optical switch having a first optical fiber and a plurality of N optical fibers. The first optical fiber forms an optical path with any one of the N optical fibers by an alignment of a longitudinal axis of an end of the first optical fiber with a longitudinal axis of an end of the one of N optical fibers. A switch in optical path is performed by a relative movement of the first optical fiber with respect to the N optical fibers for a realignment of the longitudinal axis of the end of the first optical fiber with a longitudinal axis of an end of another one of the N optical fibers.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: September 29, 1998
    Assignee: E-Tek Dynamics, Inc.
    Inventor: Jing-Jong Pan
  • Patent number: 5815625
    Abstract: The object of the present invention is to provide an absorber glass for FOP having a broad absorption band which extends from ultraviolet region through visible region to near infrared region. The absorber glass of the present invention contains 18 to 40% by weight of SiO.sub.2 and not smaller than 20% by weight of FeO and Fe.sub.2 O.sub.3 in total.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: September 29, 1998
    Assignee: Hamamatsu Photonics K.K.
    Inventor: Takeo Sugawara
  • Patent number: 5812716
    Abstract: An optical module and a temperature control method therefor, wherein the optical module includes a light-emitting device, an optical waveguide, a cooling device for cooling the light-emitting device, and a package for containing the light-emitting device, one end portion of the optical waveguide and the cooling device, and wherein the light-emitting device and the optical waveguide are optically coupled to each other. The optical waveguide has a grating section formed at the one end portion contained in the package for selectively reflecting only light with a fixed wavelength, and the cooling device cools the grating section in addition to the light-emitting device.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: September 22, 1998
    Assignee: The Furukawa Electric Co., Ltd.
    Inventor: Isamu Ohishi
  • Patent number: 5812712
    Abstract: A light source system for fiberoptic networks is presented. The system has a laser light source, an optical circulator, an optical fiber section having at least one fiber Bragg grating, and an output port. The optical circulator receives light through its first port and passes the light to the circulator's second port and light received through the second port is passed to the circulator's third port. The first port is connected to the light source. The optical fiber section is connected to the second port and the fiber Bragg grating has a reflectivity centered about a predetermined wavelength. The third port, which is unconnected to the light source, is connected to the output port of the system. Light from the output port has the predetermined wavelength with significantly reduced ASE.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: September 22, 1998
    Assignee: E-Tek Dynamics, Inc.
    Inventor: Jing-Jong Pan
  • Patent number: RE35935
    Abstract: A fiber optic terminus assembly for use in a fiber optic connector is disclosed in which a gripper element and a radially deformable ferrule are compressed into gripping engagement with the optical fiber portion of an optical cable. A terminus body and a contact sleeve engage the outer layer of the optical cable and the ferrule and position the fiber at a preselected distance from a lens surface.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: October 27, 1998
    Assignee: Labinal Components and Systems, Inc.
    Inventors: Nellie L. Cabato, LeRoy Tabb, Nicholas Volinic, Laurence N. Wesson