Hollow-Core-Fiber-Based Interferometer for High-Temperature Measurements

被引：31

作者：

Zhang, Zhe ^{[1
]}

Liao, Changrui ^{[1
]}

Tang, Jian ^{[1
]}

Wang, Ying ^{[1
]}

Bai, Zhiyong ^{[1
]}

Li, Zhengyong ^{[1
]}

Guo, Kuikui ^{[1
]}

Deng, Mi ^{[1
]}

Cao, Shaoqing ^{[1
]}

Wang, Yiping ^{[1
]}

机构：

[1] Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ, Coll Optoelect Engn, Shenzhen 518060, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2017年 / 9卷 / 02期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Hollow-core fiber; interferometer; temperature sensor; REFRACTIVE-INDEX; BRAGG GRATINGS; HIGH-SENSITIVITY; PHASE MASK; LASER; SENSOR;

D O I：

10.1109/JPHOT.2017.2671437

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：

We report a new fiber optic sensor for temperature measurement at a temperature range of up to 900 degrees C with excellent stability and repeatability. The sensing head is comprised of a short hollow-core fiber segment spliced between two single-mode fibers using a commercial splicer. Optical power from the lead-in fiber is partly coupled to silica cladding of the hollow-core fiber with the remainder propagating in air core by short distance. The two beams are then re-coupled to the core of the lead-out fiber, owing to the offset splicing joint. Due to the effective index difference between the two beams, an interference pattern in the transmission spectrum is obtained. The distinct thermo-optic coefficients between silica and air result in a high-temperature sensitivity of 41 pm/ degrees C, and the enclosed structure ensures its immunity to the external refractive index.

引用

页数：9

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