Patents by Inventor Phillip Coppin

Phillip Coppin 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).

  • Apparatus for generating a comb of optical teeth of different wavelengths
    Patent number: 5153933
    Abstract: Apparatus for generating of a comb having a large number optical teeth and comprises an optical loop (3) including an optical amplifier (5) a frequency shifter (4) and an optical filter (6). A signal from a laser (9) is partially coupled into the loop by a coupler (7) such that a part of it is output at output port (10). The signal in the loop (the feedback signal) is amplified by the amplifier (5) and frequency shifted by the frequency shifter (4) and is then partially coupled out of the loop by coupler (7). The part coupled out of the loop (the output signal) exits via output port (10). This process is repeated to produce the desired number of output signals exiting via output port (10). The signal from the laser (9) may be continuous or pulsed.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: October 6, 1992
    Assignee: British Telecommunications public limited company
    Inventors: David W. Smith, Peter Healey, Ian W. Stanley, Terence G. Hodgkinson, Phillip Coppin