摘要
A new wavelength division multiplexing method for fiber Bragg grating（FBG） sensors based on spectrum profile identification is proposed. In this method, FBGs and tilted FBG（TFBG） sensors are cascaded in a single fiber in one sensing channel. The different spectrum profiles enable the cross-correlation method to demodulate the wavelength. Therefore, the different types of sensors can occupy the same central wavelength band. Using this method, the multiplexing capacity is optimized. Experiment results demonstrate the feasibility of this method and it is useful for applications where large numbers of FBGs are needed.
A new wavelength division multiplexing method for fiber Bragg grating（FBG） sensors based on spectrum profile identification is proposed. In this method, FBGs and tilted FBG（TFBG） sensors are cascaded in a single fiber in one sensing channel. The different spectrum profiles enable the cross-correlation method to demodulate the wavelength. Therefore, the different types of sensors can occupy the same central wavelength band. Using this method, the multiplexing capacity is optimized. Experiment results demonstrate the feasibility of this method and it is useful for applications where large numbers of FBGs are needed.
基金
supported by the National Instrumentation Program of China(No.2013YQ030915)
the National Natural Science Foundation of China(Nos.61227011,61378043,61505139,61475114,and 11004150)
the Tianjin Natural Science Foundation(No.13JCYBJC16200)
the Shenzhen Science and Technology Research Project(No.JCYJ20120831153904083)
the National Basic Research Program of China(No.2010CB327802)
the Soft Science Research and Development Project of the Ministry of Housing and Urban-Rural Development of China(No.2016-K4-087)
