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. 06, 2013
Filed:
Jan. 16, 2009
Yuncai Wang, Taiyuan, CN;
Hucheng He, Taiyuan, CN;
Bingjie Wang, Taiyuan, CN;
Anbang Wang, Taiyuan, CN;
Yuncai Wang, Taiyuan, CN;
Hucheng He, Taiyuan, CN;
Bingjie Wang, Taiyuan, CN;
Anbang Wang, Taiyuan, CN;
Taiyuan University of Technology, Taiyuan, CN;
Abstract
In a method and a corresponding apparatus for performing chaotic optical time domain reflectometer, the chaotic laser signal, generated by the chaotic laser transmitter, is split into probe signal I and reference signal II by a fiber coupler. Through an optical circulator, the probe signal I is launched into the test fiber and the echo light is converted into electrical signal by a photodetector and digitalized by an A/D converter. The reference signal II is converted into electrical signal by a photodetector and digitalized by another A/D converter. Two digital signals received from two A/D converters are correlated in a signal processing device to locate the exact position of faults in fibers. The result output is then displayed on a display device. This invention was developed to overcome the tradeoff problem between resolution and dynamic range of the pulse-based OTDR.