Fabry-Perot Cavity Based on Hollow-Core Ring Photonic Crystal Fiber for Pressure Sensing

被引:17
|
作者
Ferreira, Marta S. [1 ,2 ]
Bierlich, Joerg [3 ]
Lehmann, H. [3 ]
Schuster, Kay [3 ]
Kobelke, Jens [3 ]
Santos, Jose Luis [1 ,2 ]
Frazao, Orlando [1 ]
机构
[1] INESC Porto, P-4169007 Oporto, Portugal
[2] Univ Porto, Fac Ciencias, P-4169007 Oporto, Portugal
[3] Inst Photon Technol IPHT, D-07745 Jena, Germany
关键词
Interferometry; optical fiber sensor; photonic crystal fiber; REFRACTIVE-INDEX; INTERFEROMETER; LASER; SENSORS; AIR;
D O I
10.1109/LPT.2012.2222368
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
An interferometric Fabry-Perot cavity based on hollow-core ring photonic crystal fiber (HCR-PCF) for pressure sensing is proposed. The sensing head is formed by splicing a small section of HCR-PCF to standard single mode fiber. The spectral response depends on the cavity length due to the geometry of the HCR-PCF. The sensing head is subjected to methane pressure variations, where it exhibits a sensitivity of 0.82 nm/MPa. Its response to nitrogen pressure variation is also studied. The sensing head's intrinsic sensitivity to the nitrogen refractive index variations inside the hollow-core is also estimated. Finally, temperature measurement is performed and a sensitivity of 3.77 pm/degrees C is obtained for temperatures below 200 degrees C.
引用
收藏
页码:2122 / 2124
页数:3
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