Delay-Line-Free Multi-Channel Chaotic Correlation Fiber Loop Ring Down Sensing

IF 5.9 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Xiaohui Chen;Lingzhen Yang;Juanfen Wang;Bowei Zeng;Xianwei Pan;Yisong Li;Xiaomin Fu;Meiling Wang;Yuxin Bai;Jin Qi
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Abstract

We propose and demonstrate a delay-line-free multi-channel chaotic correlation fiber loop ring down (MCCCFLRD) sensing based on time division multiplexing (TDM). The factors on the number of multiplexing channels are analyzed, such as the coupling ratio of the fiber coupler, the length of the fiber loop cavity, the length of the signal delay line, and the sampling time (ST) of date process system. The feasibility and stability of the demodulation for the multiplexing chaotic signals with delay-line-free are analyzed theoretically. The results show that the proposed chaotic signal demodulation with delay-line-free can reduce the impact of ST of date process system and achieve the maximum multiplexing number of the multi-channels in the fiber loop system. To verify the feasibility of the chaotic signal demodulation with delay-line-free, the four-channel chaotic correlation fiber loop ring down (CCFLRD) sensing is demonstrated experimentally. The peak finding and signal separation algorithm are used to identify the peak of the correlation coefficient of the multiplexing chaotic signals with delay-line-free. The Levenberg–Marquardt algorithm was used to fit the fiber loop ring down (FLRD) curves. The delay-line-free multi-channel FLRD system can improve the sampling accuracy of effective data points and increase the number of multiplexing channels. The signal demodulation of different channels does not interfere with each other in the external environment. The proposed multi-channel chaotic fiber loop sensing system with delay-line-free has the high multiplexing capacity and accuracy.
无延迟线多通道混沌相关光纤环路环下感应
我们提出并演示了一种基于时分复用(TDM)的无延迟线多通道混沌相关光纤环路环路下行(MCCCFLRD)传感。分析了光纤耦合器的耦合比、光纤环路腔的长度、信号延迟线的长度以及数据处理系统的采样时间(ST)等因素对复用通道数的影响。从理论上分析了无延迟线复用混沌信号解调的可行性和稳定性。结果表明,提出的无延迟线混沌信号解调方法可以减少数据处理系统ST的影响,实现光纤环路系统中多通道复用数的最大化。为了验证无延迟线混沌信号解调的可行性,实验验证了四通道混沌相关光纤环路断环(CCFLRD)传感。采用峰值发现和信号分离算法对无延迟线复用混沌信号的相关系数峰值进行识别。采用Levenberg-Marquardt算法拟合光纤环路向下(FLRD)曲线。无延迟线多通道FLRD系统可以提高有效数据点的采样精度,增加复用通道数。不同信道的信号解调在外界环境下互不干扰。所提出的无延迟线多通道混沌光纤环路传感系统具有较高的复用容量和精度。
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来源期刊
IEEE Transactions on Instrumentation and Measurement
IEEE Transactions on Instrumentation and Measurement 工程技术-工程:电子与电气
CiteScore
9.00
自引率
23.20%
发文量
1294
审稿时长
3.9 months
期刊介绍: Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.
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