Patents by Inventor Michael J Wale

Michael J Wale 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 power measurement in photonic integrated devices
    Patent number: 6614213
    Abstract: A photonic integrated device includes a waveguide of semiconductor material and a detector for measuring optical power of light traveling along the waveguide. The detector which is monolithically integrated into the device measures a photocurrent on an electrode which has been generated in the waveguide by two photon absorption.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: September 2, 2003
    Assignee: Bookham Technology p.l.c.
    Inventors: Neil D Whitbread, Andrew C Carter, Michael J Wale
  • Device for generating feedback signals to regulate optical monitoring circuits (PLL)
    Patent number: 5467414
    Abstract: An optical device for generating a modulated, phase controlled RF carrier by combining a modulated optical carrier signal having a first frequency with an unmodulated optical reference signal having a second frequency. The modulated and unmodulated signals are polarized on orthogonal axes and are transmitted in a single optical waveguide. Modulation of the optical carrier is performed, for example, by means of an integrated optical device which modulates only one polarization direction.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: November 14, 1995
    Assignees: Deutache Aerospace AG, GEC-Marconi, Ltd.
    Inventors: Wolfram Birkmayer, Michael J. Wale, Colin Edge