High-performance in-line Brillouin optical correlation domain analysis

被引：0
|
作者：
Jeong, Ji Ho [1 ]
Song, Kwang Yong [2 ]
Lee, Sang Bae [1 ]
Lee, Kwanil [1 ]
机构：
[1] Korea Inst Sci & Technol, Ctr Optoelect Convergence Syst, Seoul 136791, South Korea
[2] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea
来源：
23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2014年 / 9157卷
关键词：
Fiber optics sensors; fiber optics; Brillouin scattering;
D O I：
10.1117/12.2059168
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a high-performance single-ended correlation-domain Brillouin sensor based on a phase modulation of Brillouin pump and a differential measurement scheme. Large DC noise induced by direct reflection of Brillouin pump was successfully removed by the phase modulation-based differential measurement as well as additional 4-fold enhancement in the spatial resolution. By applying an intentional loss to the end of a sensing fiber one of two correlation peaks within the fiber is suppressed, leading to double enlargement of the measurement range compared to former in-line reflector based systems. In the experimental confirmation a distributed strain measurement with a range of 100 m and a spatial resolution of 5 cm is presented.
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页数：4
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