The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jan. 02, 2007

Filed:

Aug. 23, 2001
Applicants:

Jirapong Lim, Bangkok, TH;

Qingping Yang, Hillingdon, GB;

Phillip Richard Jackson, Wimborne, GB;

Barry Edward Jones, Henley-on-Thames, GB;

Inventors:

Jirapong Lim, Bangkok, TH;

Qingping Yang, Hillingdon, GB;

Phillip Richard Jackson, Wimborne, GB;

Barry Edward Jones, Henley-on-Thames, GB;

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01J 1/04 (2006.01); G01J 1/42 (2006.01); G01J 5/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

Operation of a power-by-light valve () by a source () along an optical fibre () is monitored by means of optical sensors () from which light passes back along fibre () to monitoring and processing units (). The sensors () include fibre bragg gratings () for detecting differential pressure across diaphragms () and for detecting temperature. At the input end, an optical coupler () supplies sensor signals to units () which can control source () via a signal ().


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