A novel successive demultiplexing scheme based on optical-CDMA balanced demodulation for FBG sensor systems  

作　　者：董惠娟 武剑 张广玉 

机构地区：[1]School of Mechanical and Electronical Engineering,Harbin Institute of Technology

出　　处：《Chinese Optics Letters》2009年第1期23-25,共3页中国光学快报（英文版）

基　　金：supported by the Harbin Science Research Foundation under Grant No.2003AFQXJ004

摘　　要：In order to increase the multiplexing density of the fiber Bragg gratings （FBGs） for a low cost per-sensor, based on the analysis of the spectrum shadow distortion （SSD）, a novel successive demultiplexing scheme for FBG sensors has been developed. It is based on the optical cade division multiple access （CDMA） balanced demodulation. A high-density multiplexing-demultiplexing system for FBG sensors has been designed, and corresponding simulation carried out has demonstrated that the FBG sensors＇ reflective signals can still be obtained accurately and respectively, even if FBG sensors＇ operating bandwidths heavily overlap. The SSD has been greatly mitigated.In order to increase the multiplexing density of the fiber Bragg gratings （FBGs） for a low cost per-sensor, based on the analysis of the spectrum shadow distortion （SSD）, a novel successive demultiplexing scheme for FBG sensors has been developed. It is based on the optical cade division multiple access （CDMA） balanced demodulation. A high-density multiplexing-demultiplexing system for FBG sensors has been designed, and corresponding simulation carried out has demonstrated that the FBG sensors＇ reflective signals can still be obtained accurately and respectively, even if FBG sensors＇ operating bandwidths heavily overlap. The SSD has been greatly mitigated.

关 键 词：FBG CDMA A novel successive demultiplexing scheme based on optical-CDMA balanced demodulation for FBG sensor systems 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]