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Title: Simultaneous distributed vibration and temperature sensing using multicore fiber
Authors: Dang, YL
Zhao, ZY 
Wang, XF
Liao, RL
Lu, C 
Issue Date: 2019
Source: IEEE access, 18 Oct. 2019, v. 7, p. 151818-151826
Abstract: Distributed optical fiber sensing that enables simultaneous vibration and temperature monitoring is demonstrated in this work, which is achieved by implementing polarization optical time-domain reflectometry (P-OTDR) and Raman optical time-domain reflectometry (ROTDR) respectively through space-division multiplexed (SDM) configuration in different cores of a multicore fiber (MCF). Optimized system setup is obtained in the proposed hybrid system, where only one laser source is used, and the generated pulse is shared by the two reflectometers. Owing to the reason that separate interrogation fiber cores are used by the two reflectometers, the proposed hybrid system allows for simultaneous measurements of spontaneous Raman and Rayleigh scattering signals, thus it no longer suffers from the incompatible pump power levels issue, which results from different pump power demands, and hinders the implementation of the hybrid system in single mode fiber due to the fiber nonlinear effects imposed restriction. In addition, in order to extend the sensing range, we also explore the employment of wavelet transform denoising technique in the improvement of signal-to-noise ratio of ROTDR measurement. Eventually, simultaneous distributed vibration and temperature sensing in 5.76 km sensing range with 3 m spatial resolution and 0.57 C temperature uncertainty has been demonstrated. The proposed hybrid sensing system has the outstanding advantage of high reliability, since the cross-sensitivity issue is effectively mitigated, which shows great potential for pipeline monitoring in oil and gas industry.
Keywords: Temperature sensors
Temperature measurement
Optical fiber sensors
Optical fiber polarization
Multicore fiber
Space-division multiplexing
Distributed temperature sensing
Distributed vibration sensing
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE access 
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2019.2948213
Rights: This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see
The following publication Y. Dang, Z. Zhao, X. Wang, R. Liao and C. Lu, "Simultaneous Distributed Vibration and Temperature Sensing Using Multicore Fiber," in IEEE Access, vol. 7, pp. 151818-151826 is available at
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