Research on the Signal Processing in Optical Fiber Coherent Optical Time Domain Reflectometer Based on Grey Scale Image

2015 ◽  
Vol 42 (3) ◽  
pp. 0305001 ◽  
Author(s):  
赵世琦 Zhao Shiqi ◽  
庞拂飞 Pang Fufei ◽  
贺梦婷 He Mengting ◽  
徐慧 Xu Hui ◽  
王廷云 Wang Tingyun
Keyword(s):  
Signal Processing ◽  
Optical Fiber ◽  
Time Domain ◽  
Optical Time Domain Reflectometer ◽  
Grey Scale ◽  
Optical Time ◽  
Time Domain Reflectometer

scholarly journals Analisis Link Budget Penyambungan Serat Optik Menggunakan Optical Time Domain Reflectometer AQ7275

2018 ◽  
Vol 10 (1) ◽  
pp. 36-40
Author(s):  
Tio Hanif Yanuary ◽  
Lita Lidyawati
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Time Domain ◽  
High Speed ◽  
Fiber Optic ◽  
Light Wave ◽  
Fiber Optic Cable ◽  
Optical Time Domain Reflectometer ◽  
Optical Time ◽  
Time Domain Reflectometer

An optical fiber is a high-speed telecommunication transmission medium. Principally, an optical fiber is made of a very fine glass fiber material, which is able to transmit light waves using light reflection method on the surface of the fiber optics core. An underground installation of the fiber optics makes this device robust from external interferences. However, the fiber optic cable performance should always be checked to maintain performance during data transmission process. One way to test fiber optics cable performance is by using an Optical Time - Domain Reflectometer (OTDR) device. This device sends a light wave from one point of the fiber optics cable. The light wave then returns when reaching the other point of the fiber optic cable while carrying some measurement parameters especially the physical length and attenuation of a fiber optic cable. The evaluation of the fiber optics cable performance requires the preparation, installation, and configuration of the OTDR. In this paper, we conducted evaluation on the performances of fiber optics cable. The data generated by the performed evaluation indicated an occurring attenuation on the fiber optics cable along 64.402 km of its lengths.

scholarly journals Inversion Calculation Analysis of Operational Tunnel Structure Based on the Distributed Optical-Fiber Sensing System

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Jie Zhao ◽  
Jiang Feng ◽  
Liang Ren
Keyword(s):  
Optical Fiber ◽  
Differential Evolution ◽  
Time Domain ◽  
Surrounding Rock ◽  
Optical Time Domain Reflectometer ◽  
Fiber Sensing ◽  
Sensing System ◽  
Optical Fiber Sensing ◽  
Optical Time ◽  
Time Domain Reflectometer

In combination of the actual project in Dalian Baiyun Mountain Tunnel, this paper introduces the principle of fiber optic sensor monitoring system based on optical time domain reflectometer. Then, based on the orthogonal design and even design scheme, this paper carries out a numerical experiment on the tunnel surrounding rock and establishes a regression model of the mapping relation between surrounding rock parameters of operation tunnel and the monitored displacement in order to set the difference between the monitored displacement and the calculated displacement as the fitness function. In the end, this paper carries out parameter identification based on the differential evolution algorithm. Achievements of the study proved that real-time safety warning could be realized inside the tunnel by monitoring the deformation parameters of tunnel vault at real time relying on the optical-fiber sensing system of the optical time domain reflectometer (OTDR). Parameters identification was carried out on the structure with differential evolution according to measured data and selected parameters, and great coincidence was obtained between the measured displacement and the identified parameters displacement, which proved the strong adaptability of the method.

High-Resolution Distributed Optical-Fiber Sensing Techology Based on Direct-Detecting Coherent Optical Time-Domain Reflectometer

2016 ◽  
Vol 36 (1) ◽  
pp. 0106002
Author(s):  
冯凯滨 Feng Kaibin ◽  
宋牟平 Song Muping ◽  
夏俏兰 Xia Qiaolan ◽  
陆燕 Lu Yan ◽  
尹聪 Yin Cong
Keyword(s):  
High Resolution ◽  
Optical Fiber ◽  
Time Domain ◽  
Optical Time Domain Reflectometer ◽  
Fiber Sensing ◽  
Optical Fiber Sensing ◽  
Optical Time ◽  
Distributed Optical Fiber ◽  
Time Domain Reflectometer
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