Multi-channel FBG frequency division multiplexing sensing system based on EOIM and OFDL

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-11-18 DOI:10.1016/j.optcom.2024.131320

Ruofan Wang , Xuezhi Zhang , Shengliang Zhang , Wenxin Bo , Jiapeng Sun , Kun Liu , Tiegen Liu , Junfeng Jiang

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引用次数: 0

Abstract

This paper introduces a multi-channel fiber Bragg grating (FBG) frequency division multiplexing sensing scheme based on Electro-optic intensity modulator (EOIM) and optical fiber delay line (OFDL), which integrates time-division multiplexing (TDM), spatial division multiplexing (SDM), and frequency division multiplexing (FDM) technologies to create a hybrid multiplexing solution. The scheme employs EOIM to construct optical carriers and utilizes OFDL delay processing for frequency allocation, enabling synchronous monitoring of multiple ultrasonic vibration signals. In the dual-channel experiment, the signal-to-noise ratio (SNR) of the demodulated signals typically exceeds 40 dB, with an optimal SNR reaching 61.8 dB. Additionally, crosstalk suppression between the two signals generally exceeds 30 dB, achieving a maximum of 58.7 dB in ideal conditions. These results, based on the two key indicators of SNR and crosstalk suppression, demonstrate the feasibility and outstanding performance of the proposed multiplexing scheme.

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基于EOIM和OFDL的多通道FBG频分复用传感系统

本文介绍了一种基于电光强度调制器（eim）和光纤延迟线（OFDL）的多通道光纤布拉格光栅（FBG）频分复用传感方案，该方案将时分复用（TDM）、空分复用（SDM）和频分复用（FDM）技术相结合，形成一种混合复用方案。该方案利用EOIM构造光载波，利用OFDL延时处理进行频率分配，实现了对多个超声振动信号的同步监测。在双通道实验中，解调信号的信噪比（SNR）一般超过40 dB，最优信噪比达到61.8 dB。此外，两个信号之间的串扰抑制通常超过30 dB，理想情况下最大可达到58.7 dB。基于信噪比和串扰抑制两个关键指标的结果证明了所提复用方案的可行性和优异的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.