Acta Optica Sinica, Volume. 29, Issue 12, 3282(2009)
A Study on Miniature Interferometer Strain Sensor Based on EFPI
A miniature extrinsic Fabry-Perot (F-P) interferometer (EFPI) sensor is fabricated by using simple etching and fusing method. The cavity is formed by wet chemical etching of multi-mode fiber (MMF) in hydrofluoric acid based solutions,then it is fused to the end of a single-mode fiber (SMF) to form a extrinsic F-P structure. Experiment results show that this kind of EFPI sensor has a high sensitivity to strain,but a low sensitivity to temperature. The strain sensitivity is about 0.00095 nm /μ ε. This kind of fiber sensor has many advantages,such as easy fabrication,high-repetition and mass-production,which offers great potential for sensing applications and especially for strain measurements in health monitoring of civil engineering structure.
Get Citation
Copy Citation Text
Li Kun, Wen Hongqiao, Li Hui. A Study on Miniature Interferometer Strain Sensor Based on EFPI[J]. Acta Optica Sinica, 2009, 29(12): 3282
Category: Fiber Optics and Optical Communications
Received: Nov. 20, 2008
Accepted: --
Published Online: Dec. 23, 2009
The Author Email: Kun Li (likunwz126@126.com)