Patents by Inventor Robert R. Cullen

Robert R. Cullen 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).

  • Temperature compensator for faraday rotator
    Patent number: 6252708
    Abstract: A micro-fabrication method of manufacturing optical assemblies and a temperature compensated optical isolator. The manufacturing method employs a lamination procedure to create an array of optics-receiving micro-fixtures. The method is well adapted for the automated manufacturing of optical assemblies. Desirably, the method provides for high speed, high volume production, thereby advantageously, maintaining low manufacturing costs. The isolator utilizes a bimetallic element to rotate a polarization element of the isolator in response to temperature variations. The isolator maintains an effectively constant isolation over a substantially wide temperature range. Advantageously, the isolator is simple, compact and a viable solution to a wide range of optical applications.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: June 26, 2001
    Assignee: Horizon Photonics, Inc.
    Inventors: Robert R. Cullen, Richard J. Sweeney, Henry Ty
  • Method of microfabrication
    Patent number: 6126775
    Abstract: A temperature compensated optical isolator and a method of manufacturing optical assemblies. The isolator utilizes a bimetallic element to rotate a polarization element of the isolator in response to temperature variations. The isolator maintains an effectively constant isolation over a substantially wide temperature range. Advantageously, the isolator is simple, compact and a viable solution to a wide range of optical applications. The manufacturing method employs a lamination procedure to create an array of optics-receiving micro-fixtures. The method is well adapted for the automated manufacturing of optical assemblies. Desirably, the method provides for high speed, high volume production, thereby advantageously, maintaining low manufacturing costs.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: October 3, 2000
    Assignee: Horizon Photonics, LLC
    Inventors: Robert R. Cullen, Richard J. Sweeney
  • Optical isolator in an optical fiber feedthrough
    Patent number: 5325456
    Abstract: An optical fiber feedthrough is characterized by an isolator disposed completely within the feedthrough tube.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: June 28, 1994
    Assignee: E.I. Du Pont de Nemours and Company
    Inventors: Robert R. Cullen, Joseph A. Perrotto, David R. Thompson