Patents by Inventor Lothar Mannschke

Lothar Mannschke 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).

  • Optical star coupler
    Patent number: 4838636
    Abstract: The invention relates to an optical star coupler comprising cascaded three-ports, a three-port being formed by branching branch circuits into a center channel, a tapered region being provided at the branch point. The star coupler can be of a compact structure and preferably has a short length.The branch angle between the branching side circuits and the center channel is greater than/equal to 2.5.degree. and the tapered region is reduced.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: June 13, 1989
    Assignee: U.S. Philips Corp.
    Inventor: Lothar Mannschke
  • Optical fiber connection to an optical IC
    Patent number: 4813755
    Abstract: To avoid production-technical and optical problems when connecting optical waveguides to conductor paths leading to the edge of the IC, the connection point is removed from the edge into the lateral face of the optical IC. In that region an optical conductor which extends in the interior of the IC and is connected to the waveguide embedded in the surface by overcoupling, is fed out from the IC.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: March 21, 1989
    Assignee: U.S. Philips Corp.
    Inventor: Lothar Mannschke
  • Arrangement for locating faults in an optical information transmission system
    Patent number: 4660973
    Abstract: In order to locate faults in an optical transmission system, the optical waveguide in the forward transmission path of a repeater is coupled by a beam splitter to an optical waveguide loop at the output of an amplifier. The dividing ratio of the beam splitter is based on the sensitivity of the amplifier in the return transmission path of the repeater. In the return direction the optical waveguide loop is connectable instead of the optical waveguide of the return transmission path.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: April 28, 1987
    Assignee: U.S. Philips Corporation
    Inventor: Lothar Mannschke
  • Optical star coupler
    Patent number: 4566753
    Abstract: The ends of tapered optical waveguides are focused onto one another by means of a graded index rod lens. The tapered tips are connected to the end faces of the lens. The coupling conditions are improved by taking into account the cladding modes emerging from the tapered portions.
    Type: Grant
    Filed: May 22, 1985
    Date of Patent: January 28, 1986
    Assignee: U.S. Philips Corporation
    Inventor: Lothar Mannschke
  • Optical multiplexer
    Patent number: 4535440
    Abstract: Identical coupling conditions are achieved in an integrated optical component by pairs of branch tracks which successively intersect into a central track. Low attenuation values are achieved with angles of incidence of 1.5 degrees.
    Type: Grant
    Filed: July 20, 1983
    Date of Patent: August 13, 1985
    Assignee: U.S. Philips Corporation
    Inventor: Lothar Mannschke
  • Optical multiplexer
    Patent number: 4522461
    Abstract: Radiations of different input light-wave conductors which are provided with tapering parts and are coupled at the center of an end face of a GRIN-rod lens are introduced by this lens into an output light-wave conductor. During the radiation conduction, the radiation emanating at the area of the tapering parts is also taken into account.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: June 11, 1985
    Assignee: U.S. Philips Corporation
    Inventor: Lothar Mannschke
  • Apparatus and method for coupling and decoupling of optical fiber waveguides
    Patent number: 4432601
    Abstract: An apparatus and method for coupling and decoupling of optical radiation, in particular for laser light in optical fiber waveguides. The optical fiber waveguides are positioned in V-grooves and brought to a beam splitter. The beam splitter is adjusted by independent carriage guides and rotary guides, in order to separate a part of the radiation, which is representatively predetermined and required for control purposes.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: February 21, 1984
    Assignee: Te Ka De Felten & Guilleaume Fernmeldeanlagen GmbH
    Inventor: Lothar Mannschke