A novel fiber optic ring-down interferometer for sensing |
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| Authors: | Shuna Li Jiansheng Liu Zheng Zheng Xin Li |
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| Institution: | 1. School of Electronic and Information Engineering, Beihang University, 37 Xueyuan Rd, Beijing 100191, China;2. National Key Laboratory for Electronic Measurement Technology, North University of China, 3 Xueyuan Rd, Taiyuan 030051, Shanxi, China |
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| Abstract: | A ring-down interferometer (RDI) based on a modified Mach–Zehnder structure by incorporating a pair of mirrors with very high reflectivity into each of its two arms, respectively is proposed in this paper. Launching a coherent light pulse into the interferometer, in each arm, pulse ring-down occurs between its two mirrors and outputs a chain of pulses. The two chains of pulses from the two arms combine and interfere pulse by pulse at the detector and the difference of the light phase between the two arms will be enlarged linearly in proportion to the times of ring-down. |
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| Keywords: | Optical fibers Sensors Interference Coherence |
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