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A new fiber self-mixing temperature sensor with phase compensation for harmonic vibrations
Optical Fiber Technology ( IF 2.7 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.yofte.2020.102336
Yunkun Zhao , Youze Chen , Junfeng Zhou , Yuanyang Zhao , Desheng Zhu , Yourui Tu , Benli Yu , Liang Lu

Abstract A new fiber temperature sensor is proposed based on dual-longitudinal mode laser self-mixing interference effect in a distributed Bragg reflector fiber laser. The temperature analytical model is established by use of the three-mirror cavity model and the interference superposition theory of the multi-longitudinal mode laser. It is indicated that this preferable model is sufficient to real-time track the change of the self-mixing signal waveform resulting from the ambient temperature variation by means of the phase compensation method and the waveform separation phenomena. Furthermore, the experimental measurements show that the relative error can be lower to 1.43% corresponding to 4.95 × 10-4 m/°C of the temperature sensitivity ranging from 20.14 to 46.02 °C. It has demonstrated that the measured results are in good consistent with the reference values, thereby which this sensor proves capable of measuring ambient temperature with high sensitivity and accuracy.

中文翻译:

一种具有谐波振动相位补偿的新型光纤自混合温度传感器

摘要 基于分布式布拉格反射型光纤激光器中的双纵模激光自混合干涉效应,提出了一种新型光纤温度传感器。利用三镜腔模型和多纵模激光器干涉叠加理论建立了温度解析模型。表明该优选模型足以通过相位补偿方法和波形分离现象实时跟踪环境温度变化引起的自混合信号波形的变化。此外,实验测量表明,相对误差可以低至 1.43%,对应于 20.14 至 46.02 °C 的温度灵敏度的 4.95 × 10-4 m/°C。
更新日期:2020-10-01
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