Patents by Inventor Mingdeh Chien

Mingdeh Chien 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: 6186631
    Abstract: A unitary two-section semiconductor optical amplifier including a first active region, a second active region, and a passive region integrally connected between the first and second active regions to minimize optical loss therebetween. The arrangement of the two-section semiconductor optical amplifier is advantageous in that the gain in the first active region may be increased in order to maintain a substantially constant input power level to the second active region over a relatively wide dynamic range of input power levels to the first active region.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: February 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Robert E. Behringer, Kevin F. Dreyer, Chih-Hsiao Chen, Mingdeh Chien, Uziel Koren, Barry I. Miller