Journal
IEEE PHOTONICS JOURNAL
Volume 12, Issue 1, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2019.2957538
Keywords
Optical fiber sensors; Temperature sensors; Optical fiber polarization; Sensitivity; Temperature measurement; Interference; Twist; temperature; temperature compensation
Funding
- National Key R&D Program of China [2018YFF01011800]
- National Natural Science Foundation of China [61775070]
- Fundamental Research Funds for the Central Universities [2017KFYXJJ032]
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A new optical fiber twist sensor with temperature compensation mechanism is designed and experimentally demonstrated. The main structure of this twist sensor is a torsion perturbation point cascaded with single mode-multimode-single mode (SMS) fiber structure. The experimental results show that the twist sensor has ability to distinguish the twist direction with sensitivities of 9.5 pm/degrees and 34.7 pm/degrees at the chosen dips in the range from -100 degrees (CCW) to 140 degrees (CW). Furthermore, the temperature response characteristic of the sensor is also researched through experiment. Temperature sensitivities of 71.8 pm/degrees C and 65.2 pm/degrees C can be obtained at the same dips in the range from 20 degrees C to 75 degrees C. In addition, the temperature's influence can be compensated with post-measurement calculation through the cross-matrix. The theoretical resolutions of twist and temperature simultaneous measurement are +/- 0.084 degrees and +/- 0.32 degrees C, respectively.
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