Patents by Inventor Leif G. Fredin

Leif G. Fredin 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).

  • Patent number: 7024085
    Abstract: Optical systems are disclosed which include one or more components such as an optical multiplexer, an optical demultiplexer, and, an optical amplifier. An optical device is included in the optical system and is configured to communicate with the optical component(s). The optical device includes a substrate proximate to which is disposed a first waveguide array. A second waveguide array is also provided that is disposed proximate the substrate so that a portion of the second waveguide array intersects a portion of the first waveguide array at a predetermined angle, so that a junction is formed. An index of refraction associated with the junction can be varied so that desirable effects can be implemented concerning optical signals transmitted through the waveguides.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: April 4, 2006
    Assignee: Finisar Corporation
    Inventors: Terry L. Markwardt, Leif G. Fredin, Ray T. Chen, Ram Sivaraman
  • Publication number: 20040218855
    Abstract: Optical systems are disclosed which include one or more components such as an optical multiplexer, an optical demultiplexer, and, an optical amplifier. An optical device is included in the optical system and is configured to communicate with the optical component(s). The optical device includes a substrate proximate to which is disposed a first waveguide array. A second waveguide array is also provided that is disposed proximate the substrate so that a portion of the second waveguide array intersects a portion of the first waveguide array at a predetermined angle, so that a junction is formed. An index of refraction associated with the junction can be varied so that desirable effects can be implemented concerning optical signals transmitted through the waveguides.
    Type: Application
    Filed: June 3, 2004
    Publication date: November 4, 2004
    Inventors: Terry L. Markwardt, Leif G. Fredin, Ray T. Chen, Ram Sivaraman
  • Patent number: 6778736
    Abstract: An optical device with at least one junction formed by an intersection of at least two waveguides may be used to tap, and/or attenuate an optical signal. The waveguides may be formed from various materials such as polymers and other combinations of monomers. Internal reflection produced at each junction between the waveguides in response to heating from a thin film electrode will direct a portion of an optical signal from one of the waveguides to another waveguide. Internal reflection at each junction may be used to selectively tap and/or attenuate power level of an optical signal.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: August 17, 2004
    Assignee: Finisar Corporation
    Inventors: Terry L. Markwardt, Leif G. Fredin, Ray T. Chen, Ram Sivaraman
  • Publication number: 20020131712
    Abstract: An optical device with at least one junction formed by an intersection of at least two waveguides may be used to tap, and/or attenuate an optical signal. The waveguides may be formed from various materials such as polymers and other combinations of monomers. Internal reflection produced at each junction between the waveguides in response to heating from a thin film electrode will direct a portion of an optical signal from one of the waveguides to another waveguide. Internal reflection at each junction may be used to selectively tap and/or attenuate power level of an optical signal.
    Type: Application
    Filed: March 14, 2002
    Publication date: September 19, 2002
    Inventors: Terry L. Markwardt, Leif G. Fredin, Ray T. Chen, Ram Sivaraman