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发表时间：2015-01-01

发表刊物：光学精密工程

期号：4

页面范围：956-964

ISSN号：1004-924X

摘要：According to microwave network theory, a coaxial photonic band gap crystal strain sensor was proposed based on a variable insulating layer. The model of the coaxial photonic band-gap crystal sensor was provided, and the relationship between the peak frequency of band gap and the electric length of the crystal was deduced. The structural size and the material parameters of the coaxial photonic band gap crystal sensor under a certain demand were designed. The S parameters were calculated, and they are well coincided with that from a simulation. The method for improving the sensitivity and quality factor of the sensor was analyzed and an experimental platform was set up. The experimental result shows that when the strain changes from 0 μΕ to 10 000 μΕ, the peak frequency of the band gap is changed from 2.450 GHz to 2.432 GHz, in which the frequency shift is 18 MHz, and the sensitivity is 1.8 kHz/μΕ. The simulation results coincide with the experimental one, and validate the feasibility of the designing method of the strain sensor. ©, 2015, Chinese Academy of Sciences. All right reserved.

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