Patents by Inventor Ali Guermache

Ali Guermache 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 interferometer
    Patent number: 7254291
    Abstract: One embodiment of an optical interferometer includes a first MMI device coupled to a second MMI device via a waveguide. The first MMI device separates a first signal into a guided portion and a diffused portion. The guided portion is transmitted to the second MMI device through the waveguide. At least part of the diffused portion reflects off a reflector towards the second MMI device and is coupled with the guided portion within either the second MMI device or a part of the waveguide proximal to the second MMI device, forming at least part of a second signal. The difference between the propagation times of the guided portion and the at least part of the diffused portion results in constructive or destructive interference between the two portions, allowing specific channels to be added to or dropped from the first signal.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: August 7, 2007
    Assignee: Avanex Corporation
    Inventors: Jean-Rene Burie, Ali Guermache
  • Optical interferometer
    Publication number: 20060215953
    Abstract: One embodiment of an optical interferometer includes a first MMI device coupled to a second MMI device via a waveguide. The first MMI device separates a first signal into a guided portion and a diffused portion. The guided portion is transmitted to the second MMI device through the waveguide. At least part of the diffused portion reflects off a reflector towards the second MMI device and is coupled with the guided portion within either the second MMI device or a part of the waveguide proximal to the second MMI device, forming at least part of a second signal. The difference between the propagation times of the guided portion and the at least part of the diffused portion results in constructive or destructive interference between the two portions, allowing specific channels to be added to or dropped from the first signal.
    Type: Application
    Filed: September 1, 2005
    Publication date: September 28, 2006
    Inventors: Jean-Rene Burie, Ali Guermache