Silicon photonic integrated interrogator for fiber-optic distributed acoustic sensing

作     者：ZHICHENG JIN JIAGENG CHEN YANMING CHANG QINGWEN LIU ZUYUAN HE ZHICHENG JIN;JIAGENG CHEN;YANMING CHANG;QINGWEN LIU;ZUYUAN HE

作者机构：State Key Laboratory of Advanced Optical Communication System and NetworksDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2024年第12卷第3期

页      面：465-473页

核心收录：

学科分类：070207[理学-光学] 07[理学] 080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China(62005163 U2239203) 

主　　题：fiber polarization modulator 

摘      要：Distributed acoustic sensing(DAS)technology has been a promising tool in various ***,the large size and relatively high cost of DAS equipment composed of discrete devices restrict its further popularization to some degree,and the photonic integration technology offers a potential *** this paper,we demonstrate an integrated interrogator for DAS on the silicon-on-insulator(SOI)*** design of the chip revolves around a Mach–Zehnder modulator(MZM)transmitter and a dual-quadrature and dualpolarization coherent *** integrated interrogator supports multiple DAS schemes,including the time-gated digital optical frequency domain reflectometry(TGD-OFDR),which is adopted for system performance evaluation.59■strain resolution in 12.1km sensing fiber with 1.14 m spatial resolution(SR)is ***,along 49.0 km sensing fiber,81■strain resolution with 3.78 m SR is *** results show that the integrated interrogator has comparable performance to the discrete DAS *** the best of our knowledge,this is the first dedicated on-chip DAS interrogator,which validates the effectiveness of the blend of photonics integration and DAS technology.