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Updated: Feb 4, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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High-Resolution Temperature Sensor Based on Single-Frequency Ring Fiber Laser via Optical Heterodyne Spectroscopy

Liangcheng Duan1, Haiwei Zhang2, Wei Shi3

  • 1Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronics Information Science and Technology (Ministry of Education), School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China. dlc@tju.edu.cn.

Sensors (Basel, Switzerland)
|September 29, 2018
PubMed
Summary

This study presents a high-resolution temperature sensor utilizing optical heterodyne spectroscopy and a narrow-linewidth fiber laser. The sensor achieves a resolution of approximately 5 × 10-3 °C, enabling precise temperature measurements.

Keywords:
fiber optics sensorsheterodyne spectroscopyhigh resolutionsingle-frequency laser

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