Temperature sensitivity enhancement in a standard optical fiber with double coatings at low temperature

被引：1
|
作者：
Lu, Xin [1 ]
Soto, Marcelo A. [1 ]
Thevenaz, Luc [1 ]
机构：
[1] EPFL Swiss Fed Inst Technol, SCI STI LT, Inst Elect Engn, Stn 11, CH-1015 Lausanne, Switzerland
来源：
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS) | 2017年 / 10323卷
关键词：
Fiber optics sensors; distributed fiber sensing; Brillouin scattering; Rayleigh scattering; BRILLOUIN FREQUENCY-SHIFT; GRATING SENSORS; STRAIN;
D O I：
10.1117/12.2264633
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The thermomechanical behavior of a standard optical fiber with double coating is theoretically analyzed at room temperature and similar to 220 K. As the primary coating becomes stiffer at low temperature, the impact of the thermal expansion of the coatings is no longer negligible and contributes to the thermal response of the fiber sensor. The temperature sensitivity enhancement is validated by distributed fiber sensors based on Brillouin scattering and coherent Rayleigh scattering at 220 K; the experimental results agree well with the theoretical analysis.
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页数：4
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