Chinese Journal of Lasers, Vol. 47, Issue 9, 0906004 (2020)
3D Printing Optical Fiber Fabry-Perot Cavity Acoustic Emission Sensor
Shen Shi1, Wei Heming1, Wang Jun2, Liu Huanhuan1, Ma Zhangwei1, Chen Na1, Shang Yana1, and Pang Fufei1,*
- 1Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication &Information Engineering, Shanghai University, Shanghai 200444, China;
- 2College of Advanced Vocational Technology, Anshan Normal University, Anshan, Liaoning 114008, China
A novel optical fiber acoustic emission sensor based on extrinsic Fabry-Perot cavity is proposed in this study. Digital optical processing 3D printing technology is used to create an acoustic vibration-sensitive diaphragm, and the structure is based on flexible digital model design and can be formed in one time. It is easy to integrate with the surface of a standard optical fiber ceramic insert. The experimental results show that the fabricated Fabry-Perot sensor exhibits a high extinction ratio. The acoustic emission sensor exhibits a high sensitivity in a frequency range of 600 Hz--2.4 kHz, and the pressure sensitivity is 2.81 mV/Pa at a frequency of 1.6 kHz. The proposed optical fiber acoustic emission sensor based on 3D printing technology is extremely stable and easy to be fabricated, and it has potential in the fields of acoustic emission detection.
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