Silicon photonic integrated interrogator for fiber-optic distributed acoustic sensing  

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

机构地区：[1]State Key Laboratory of Advanced Optical Communication System and Networks,Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Photonics Research》2024年第3期465-473,共9页光子学研究（英文版）

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

摘　　要：Distributed acoustic sensing(DAS)technology has been a promising tool in various applications.Currently,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 solution.In this paper,we demonstrate an integrated interrogator for DAS on the silicon-on-insulator(SOI)platform.The design of the chip revolves around a Mach–Zehnder modulator(MZM)transmitter and a dual-quadrature and dualpolarization coherent receiver.The 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 realized.Besides,along 49.0 km sensing fiber,81■strain resolution with 3.78 m SR is achieved.The results show that the integrated interrogator has comparable performance to the discrete DAS system.To 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.

关 键 词：fiber POLARIZATION MODULATOR 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN256[自动化与计算机技术—控制科学与工程]