Heterodyne-Based Interrogation of FBGs Temporally and Spectrally Multiplexed in Bus Topology

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-02-13 DOI:10.1109/LPT.2025.3540904

Takahiro Matsumoto;Keiji Kuroda

引用次数: 0

Abstract

This letter reports on the interrogation of fiber Bragg gratings (FBGs) arranged in a bus topology. By applying time- and wavelength-division multiplexing techniques, FBGs incorporated within a branch are distinguished spectrally and FBGs incorporated within different branches are distinguished temporally, respectively. This hybrid multiplexing method allows the number of FBG sensor heads to be increased. A heterodyne detection technique is used to increase the signal-to-noise ratio of the weak reflection signals. Reflections from six FBGs with two peak wavelengths are observed simultaneously as beat oscillations.

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这封信报告了对光纤布拉格光栅（fbg）布置在总线拓扑结构的研究。通过采用时分复用技术和波分复用技术，分别对分支内合并的光纤光栅进行频谱区分，对不同分支内合并的光纤光栅进行时间区分。这种混合复用方法允许增加FBG传感器头的数量。采用外差检测技术提高了弱反射信号的信噪比。六个具有两个峰值波长的fbg的反射同时被观察到为热振荡。

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

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.