Cost-effective high-spatial-resolution photon-counting optical time-domain reflectometry at 850  nm

2018 ◽  
Vol 57 (30) ◽  
pp. 8824 ◽  
Author(s):  
Bin Li ◽  
Qiang Zhou ◽  
Ruiming Zhang ◽  
Junyi Li ◽  
Heng Zhou ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Time Domain ◽  
High Spatial Resolution ◽  
Photon Counting ◽  
Cost Effective ◽  
Time Domain Reflectometry ◽  
Optical Time Domain Reflectometry ◽  
Optical Time

scholarly journals Sub-Meter Spatial Resolution Phase-Sensitive Optical Time-Domain Reflectometry System Using Double Interferometers

2018 ◽  
Vol 8 (10) ◽  
pp. 1899 ◽  
Author(s):  
Shengwen Feng ◽  
Tuanwei Xu ◽  
Jianfen Huang ◽  
Yang Yang ◽  
Lilong Ma ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Time Domain ◽  
Time Domain Reflectometry ◽  
Bilateral Filtering ◽  
Rayleigh Backscattering ◽  
Detection Frequency ◽  
Optical Time Domain Reflectometry ◽  
Phase Sensitive ◽  
Optical Time ◽  
Phase Generated Carrier

An improved phase-sensitive optical time-domain reflectometry (φ-OTDR) system with sub-meter spatial resolution is demonstrated. Two Michelson interferometers (MIs) with different path length differences are used in the proposed system. One is 10 m, the other is 9.2 m. Two Rayleigh backscattering phase traces with different spatial resolution are obtained by a phase generated carrier (PGC) algorithm at adjacent times. After using differencing and adaptive 2-D bilateral filtering algorithms, a 0.8-m spatial resolution over 2 km is achieved. Experimental results indicate that the system shows an extraordinary linearity as high as 99.94% with amplitude-modulation and acquires a detection frequency from 5 to 500 Hz.

Dispersion independent long-haul photon-counting optical time-domain reflectometry

2020 ◽  
Vol 45 (9) ◽  
pp. 2640 ◽  
Author(s):  
Bin Li ◽  
Ruiming Zhang ◽  
Yong Wang ◽  
Hao Li ◽  
Lixing You ◽  
...  
Keyword(s):  
Time Domain ◽  
Photon Counting ◽  
Time Domain Reflectometry ◽  
Optical Time Domain Reflectometry ◽  
Optical Time
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