标题：Miniature interrogator for multiplexed FBG strain sensors based on a thermally tunable microring resonator array
作者：Yang, Fan; Zhang, Wenjia; Zhao, Shuangxiang; Liu, Qingwen; Ta, Jifang; He, Zuyuan
作者机构：[Yang, Fan; Zhang, Wenjia; Zhao, Shuangxiang; Liu, Qingwen; He, Zuyuan] Shanghai Jiao Tong Univ, Dept Elect Engn, State Key Lab Adv Opt Commun Syst & 更多
通讯作者：Zhang, Wenjia;Zhang, WJ
通讯作者地址：[Zhang, WJ]Shanghai Jiao Tong Univ, Dept Elect Engn, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China.
摘要：We present a high-resolution and miniature multi-wavelength Fiber Bragg Grating (FBG) interrogator based on a thermally tunable microring resonator (MRR) array. A phase detection method using dithering signals is exploited to generate an antisymmetric error signal curve, which is utilized for the feedback locking of the MRR with the FBG sensor. Dynamic strain sensing of both single FBG and multiple FBGs are experimentally demonstrated, with a dynamic strain resolution of 30 n epsilon/root Hz over 100 Hz to 1 kHz. The proposed interrogator shows the great improvements in both resolution and wavelength accuracy compared with the reported MRR-based interrogators and is promising for scalable multiplexed sensing applications. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement