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5 November 2020 Edge characteristic analysis of demodulation structure based on micro-ring resonator in fiber Bragg grating sensing system
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Proceedings Volume 11569, AOPC 2020: Optical Information and Network; 115690G (2020) https://doi.org/10.1117/12.2580025
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China
Abstract
The edge demodulation structure consisting of a micro-ring resonator and an asymmetric M-Z interferometer is proposed and investigated for applications in sensing system. According to the linear conversion between wavelength and intensity in the demodulation principle, the parameters affecting the linear region of spectral response are analyzed theoretically. Numerical analysis shows that the ratio of δ to ΔΦ is 0.5 is the best premise to realize wavelength demodulation. The accuracy decreases with the increase of coupling coefficient K, but the demodulation range is improved. The change of coupling angle k1 and k2 makes the waveform shrink according to a certain rule, thus changing the detection sensitivity. Meanwhile, the demodulation performance improves as the transmission factor α increases.
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Jing He, He You, Qi Zhang, Xiangjun Xin, and Jinlong Zhang "Edge characteristic analysis of demodulation structure based on micro-ring resonator in fiber Bragg grating sensing system", Proc. SPIE 11569, AOPC 2020: Optical Information and Network, 115690G (5 November 2020); https://doi.org/10.1117/12.2580025
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