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.
Patent No.:
Date of Patent:
Oct. 16, 2007
Filed:
Aug. 31, 2005
Gaozhi Xiao, Kanata, CA;
Ping Zhao, Kanata, CA;
Fengguo Sun, Ottawa, CA;
Zhenguo LU, Ottawa, CA;
Zhiyi Zhang, Ottawa, CA;
Chander P. Grover, Gloucester, CA;
Gaozhi Xiao, Kanata, CA;
Ping Zhao, Kanata, CA;
Fengguo Sun, Ottawa, CA;
Zhenguo Lu, Ottawa, CA;
Zhiyi Zhang, Ottawa, CA;
Chander P. Grover, Gloucester, CA;
National Research Council of Canada, Ottawa, ON, CA;
Abstract
A compact interrogator for the simultaneous interrogation of multi wavelength-modulated fiber optical sensors, includes a planar waveguide based demultiplexer receiving input signals from the sensors. An array of detectors is coupled to output waveguides of the demultiplexer corresponding to different nominal wavelengths. A tuning element matches the nominal wavelengths of the output waveguide to the input signals from the respective sensors to find the wavelengths of the individual sensors to be interrogated.