OTDR based on Brillouin dynamic grating in an e-core two-mode fiber for simultaneous measurement of strain and temperature distribution

被引：0
作者：
Kim, Yong Hyun [1 ]
Song, Kwang Yong [1 ]
机构：
[1] Chung Ang Univ, Dept Phys, Seoul 06974, South Korea
来源：
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS) | 2017年 / 10323卷
关键词：
Two-mode fiber; stimulated Brillouin scattering; distributed measurement; dynamic grating; POLARIZATION-MAINTAINING FIBER; FREQUENCY-SHIFT; OPTICAL-FIBER; DISCRIMINATION; SCATTERING; BACKSCATTER; SENSOR;
D O I：
10.1117/12.2267466
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：
Discriminative measurement of strain and temperature distribution is experimentally demonstrated by optical time-domain reflectometry of Brillouin dynamic grating (BDG-OTDR) in an elliptical core two-mode fiber (e-core TMF). The acoustic waves generated by the amplified spontaneous Brillouin scattering of LP01 mode in x-polarization are used to reflect the LP11 mode in x-and y-polarizations. Distribution maps of intermodal birefringence between the LP01 and LP11 modes with two different polarizations are measured to separate strain and temperature induced spectral shift of the BDG in a 95 m e-core TMF with 2.0 m spatial resolution. The strain and temperature sensitivities are measured to be -0.082 MHz/mu epsilon and 6.8 MHz/degrees C for the pair of LP01y-LP11x modes, and -0.095 MHz/mu epsilon and 3.9 MHz/degrees C for the pair of LP01x-LP11x modes, respectively.
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页数：4
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