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:
Aug. 11, 2015
Filed:
May. 09, 2014
Exfo Inc., Quebec, CA;
Mathias Westlund, Lerum, SE;
Henrik Sunnerud, Landvetter, SE;
EXFO Inc., Quebec, CA;
Abstract
There are provided a method and a system for characterizing the CMRR of an ICR under test, which employ highly coherent light from two continuous-wave (CW) single-frequency lasers whose respective optical frequencies mutually differ by an offset defining an 'Intermediate Frequency' (f) in the rf electrical baseband. The method involves the coherent mixing of light from these two lasers in the ICR under test. A 'tone' in the rf electrical baseband at frequency fis generated by the beating of light from the two single-frequency lasers as they interfere on the photodetectors of the ICR. The resulting tone at frequency fin the output electrical signals of the ICR is then detected and analyzed to characterize the CMRR of the ICR.