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. 22, 2017
Filed:
Jun. 01, 2015
Beijing University of Posts and Telecommunications, Beijing, CN;
Jifang Qiu, Beijing, CN;
Bo Yuan, Beijing, CN;
Jian Wu, Beijing, CN;
Yan Li, Beijing, CN;
Xiaobin Hong, Beijing, CN;
Hongxiang Guo, Beijing, CN;
Jintong Lin, Beijing, CN;
Beijing University of Posts and Telecommunications, Beijing, CN;
Abstract
An apparatus and a method for monitoring in-band OSNR (Optical Signal-to-Noise Ratio) which monitors the in-band OSNR by using two parallel Mach-Zehnder-interferometers with different optical time delays are disclosed. The apparatus and method can be resistant to chromatic dispersion, polarization mode dispersion and polarized noise, can measure the coherence characteristics of the signal without removing the noise, and can be manufactured into a semiconductor integrated device and be applied in the future high-speed optical network.