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Title:
ONLINE OPTICAL TIME DOMAIN REFLECTOMETER STRUCTURE, DETECTION SYSTEM, AND DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/056634
Kind Code:
A1
Abstract:
An online optical time domain reflectometer (OTDR) structure, a detection system, and a detection method. In the structure, a light outlet of a narrow-linewidth pulsed laser (101) is connected to a first light inlet (1) of a circulator (102); a second light inlet/outlet (2) of the circulator (102) is used for connecting to an external optical fiber to be detected; a third light outlet (3) of the circulator (102) is connected to an optical filter (103); the optical filter (103) is connected in series between the third light outlet (3) of the circulator (102) and an optical detector (104); a signal output port of the optical detector (104) is connected to a processor (105); the processor (105) is further connected to the narrow-linewidth pulsed laser (101) so as to provide a driving signal for the narrow-linewidth pulsed laser (101). The narrow-linewidth pulsed laser (101) and the optical filter (104) are chosen to be used together, such that only narrowband spectra in a pulsed light wavelength range can be acquired by the optical detector (104) so that the dynamic range and measuring range of the OTDR itself are improved, and furthermore most of reverse ASE in an EDFA system can be filtered so that the dynamic range during online monitoring is improved.

Inventors:
YE ZHIJUN (CN)
XIONG TAO (CN)
YU CHUNPING (CN)
XU HONGCHUN (CN)
YU ZHENYU (CN)
ZHANG JIANTAO (CN)
Application Number:
PCT/CN2017/118232
Publication Date:
March 28, 2019
Filing Date:
December 25, 2017
Export Citation:
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Assignee:
ACCELINK TECH CO LTD (CN)
International Classes:
H04B10/071
Domestic Patent References:
WO2014201057A22014-12-18
Foreign References:
CN107483106A2017-12-15
CN106788694A2017-05-31
CN201876348U2011-06-22
CN101650197A2010-02-17
CN102148643A2011-08-10
CN106500823A2017-03-15
CN102761364A2012-10-31
CN103582808A2014-02-12
Attorney, Agent or Firm:
BEIJING TIAN QI ZHI XIN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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