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:
Nov. 20, 2018
Filed:
Jun. 29, 2016
Huawei Technologies Co., Ltd., Shenzhen, CN;
Yansui Huang, Shenzhen, CN;
Enbo Zhou, Shenzhen, CN;
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
The present invention provides a fiber-cut detection method, apparatus, and system. When a fiber cut occurs, power of input signal light decreases quickly at a fiber-cut location. When the fiber-cut location is relatively far away from an amplifier, pump light consumption of the input signal light in the remaining fiber reduces due to reduction of the input signal light, which causes an increase of remaining pump optical power in the fiber and an increase of an actual gain value of the amplifier. A gain-locking function of the amplifier works, which decreases pump power of the pump light and maintains a gain of the amplifier unchanged basically. Output optical power of the amplifier decreases quickly with decrease of input optical power, and when power of an output optical signal decreases to power that is lower than preset power of the output optical signal, it is determined that a fiber cut occurs.