[2] OU Y, ZHOU C, QIAN L, et al. Large WDM FBG sensor network based on frequency-shifted interferometry[J]. IEEE Photonics Technology Letters, 2017, 29（6）: 535-538.

[3] XIA L, WU Y, RAHUBADDE U, et al. Tdm interrogation of identical weak fbgs network based on delayed laser pulses differential detection[J]. IEEE Photonics Journal, 2018, 10（3）: 1-8.

[5] ZHANG H, FAN D, MA Y, et al. Interrogation of 5000 ultraweak fiber Bragg grating sensors using optical frequency domain reflectometry[J]. Optical Engineering, 2018, 57（10）: 106110-106110.

[6] CHILDS P. An FBG sensing system utilizing both WDM and a novel harmonic division scheme[J]. Journal of Lightwave Technology, 2005, 23（1）: 348-354.

[7] HU C, WEN H, BAI W. A novel interrogation system for large scale sensing network with identical ultra-weak fiber Bragg gratings[J]. Journal of Lightwave Technology, 2014, 32（7）: 1406-1411.

[8] GOTTEN M, LOCHMANN S, AHRENS A, et al. 2000 serial FBG sensors interrogated with a hybrid CDM-WDM scheme[J]. Journal of Lightwave Technology, 2020, 38（8）: 2493-2503

[9] LI D, JIANG Q, SUI Q. Simulation of FBG sensing networks using CDM+ SDM[EB/OL]. （2022-06-06）[2022-06-06]. https://xueshu.baidu.com/usercenter/paper/show?paperid=26c7ffa27456bc9bf9b9056d98259f18&site=xueshu_se.