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首页> 外文期刊>Optical fiber technology >Improvement of signal to noise ratio of time domain mutliplexing fiber Bragg grating sensor network with Golay complementary codes
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Improvement of signal to noise ratio of time domain mutliplexing fiber Bragg grating sensor network with Golay complementary codes

机译：利用Golay互补码改善时域复用光纤布拉格光栅传感器网络的信噪比。

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摘要

This paper reports the employment of autocorrelation properties of Golay complementary codes (GCC) to enhance the performance of the time domain multiplexing fiber Bragg grating (TDM-FBG) sensing network. By encoding the light from laser with a stream of non-return-to-zero (NRZ) form of GCC and launching it into the sensing area that consists of the FBG sensors, we have found that the FBG signals can be decoded correctly with the autocorrelation calculations, confirming the successful demonstration of coded TDM-FBG sensor network. OptiGrating and OptiSystem simulators were used to design customized FBG sensors and perform the coded TDM-FBG sensor simulations, respectively. Results have substantiated the theoretical dependence of SNR enhancement on the code length of GCC, where the maximum SNR improvement of about 9 dB is achievable with the use of 256 bits of GCC compared to that of 4 bits case. Furthermore, the GCC has also extended the strain exposure up to 30% higher compared to the maximum of the conventional single pulse case. The employment of GCC in the TDM-FBG sensor system provides overall performance enhancement over the conventional single pulse case, under the same conditions. (C) 2017 Elsevier Inc. All rights reserved.
机译：本文报告了采用Golay互补码（GCC）自相关属性来增强时域复用光纤布拉格光栅（TDM-FBG）传感网络的性能。通过使用非归零（GZ）形式的GCC流对来自激光的光进行编码并将其发射到由FBG传感器组成的传感区域中，我们发现FBG信号可以使用FCC正确解码。自相关计算，证实了编码TDM-FBG传感器网络的成功演示。 OptiGrating和OptiSystem模拟器用于设计定制的FBG传感器并分别执行编码的TDM-FBG传感器模拟。结果证实了SNR增强对GCC编码长度的理论依赖性，与4位的情况相比，使用256位的GCC可以实现大约9 dB的最大SNR提高。此外，与传统的单脉冲情况相比，GCC还使应变暴露扩展了多达30％。在相同条件下，与传统的单脉冲情况相比，在TDM-FBG传感器系统中采用GCC可以提供整体性能增强。 （C）2017 Elsevier Inc.保留所有权利。

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