Patents by Inventor Xian L. Yeh

Xian L. Yeh 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).

  • Fiber optic connector housing
    Patent number: 5515469
    Abstract: A fiber optic RF signal distribution system has a plurality of antenna stations, each station including an RF antenna. A central RF signal distribution hub receives and transmits signals external to the system. A pair of optical fibers connects each antenna station directly to the distribution hub with the connections being in a star configuration. A connectorized laser module permits direct coupling of a distributed feedback semiconductor laser to the end of each optical fiber without an intervening connector. The module accepts an APC connector with the angled end of its optical fiber in an aperture plane in a connector housing. A distributed feedback laser is mounted in the connector housing with a lens for illuminating the aperture plane and hence, the end of the fiber at an acute angle to the axis of the fiber. Furthermore, the illumination is defocused at the aperture plane for loose optical coupling to the fiber and minimized reflection to the DFB laser.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: May 7, 1996
    Assignee: Ortel Corporation
    Inventors: Harold A. Zarem, Xian L. Yeh, Henry A. Blauvelt, Israel Ury
  • Low cost optical fiber RF signal distribution system
    Patent number: 5457557
    Abstract: A fiber optic RF signal distribution system has a plurality of antenna stations, each station including an RF antenna. A central RF signal distribution hub receives and transmits signals external to the system. A pair of optical fibers connects each antenna station directly to the distribution hub with the connections being in a star configuration. A connectorized laser module permits direct coupling of a distributed feedback semiconductor laser to the end of each optical fiber without an intervening connector. The module accepts an APC connector with the angled end of its optical fiber in an aperture plane in a connector housing. A distributed feedback laser is mounted in the connector housing with a lens for illuminating the aperture plane and hence, the end of the fiber at an acute angle to the axis of the fiber. Furthermore, the illumination is defocused at the aperture plane for loose optical coupling to the fiber and minimized reflection to the DFB laser.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: October 10, 1995
    Assignee: Ortel Corporation
    Inventors: Harold A. Zarem, Xian L. Yeh, Henry A. Blauvelt, Israel Ury