On-Chip Sub-Picometer Continuous Wavelength Fiber-Bragg-Grating Interrogator  

作　　者：Yuan ZHUANG Jun ZOU Jiqiang ZHANG Lu ZHANG Jiahe ZHANG Leixin MENG Qing YANG 

机构地区：[1]Research Center for Humanoid Sensing,Zhejiang Lab,Hangzhou 311121,China [2]ZJU-Hangzhou Global Scientific and Technological Innovation Center,Hangzhou 310014,China [3]State Key Laboratory of Modern Optical Instrumentation,College of Optical Science and Engineering,International Research Center for Advanced Photonics,Zhejiang University,Hangzhou 310058,China

出　　处：《Photonic Sensors》2024年第1期73-84,共12页光子传感器（英文版）

基　　金：This work wasssupported by the National Natural Science Foundation of China(Grant Nos.62020106002 and 61735017);Innovation Project of Zhejiang Laboratory(Grant No.2021MG0AL01);the Youth Foundation of Zhejiang Laboratory(Grant No.2020MC0AA08);Major Scientific Research Project of Zhejiang Laboratory(Grant No.2019MC0AD02);National Key Basic Research Program of China(Grant No.2021YFC2401403).

摘　　要：Miniaturized fiber-Bragg-grating(FBG)interrogators are of interest for applications in the areas where weight and size controlling is important,e.g.,airplanes and aerospace or in-situ monitoring.An ultra-compact high-precision on-chip interrogator is proposed based on a tailored arrayed waveguide grating(AWG)on a silicon-on-insulator(SOI)platform.The on-chip interrogator enables continuous wavelength interrogation from 1544 nm to 1568 nm with the wavelength accuracy of less than 1 pm[the root-mean-square error(RMSE)is 0.73 pm]over the whole wavelength range.The chip loss is less than 5 dB.The 1×16 AWG is optimized to achieve a large bandwidth and a low noise level at each channel,and the FBG reflection peaks can be detected by multiple output channels of the AWG.The fabricated AWG is utilized to interrogate FBG sensors through the center of gravity(CoG)algorithm.The validation of an on-chip FBG interrogator that works with sub-picometer wavelength accuracy in a broad wavelength range shows large potential for applications in miniaturized fiber optic sensing systems.

关 键 词：Fiber optic sensing on-chip interrogator arrayed waveguide grating center of gravity 

分 类 号：TN253[电子电信—物理电子学]