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Experimental Research on an Optical Fiber Temperature and Stress Sensor Based on the Time Offset

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A novel method to obtain stress and temperature measurements using time offset is presented. The stress and temperature were detected using the second harmonic generation to detect the correlation value between the monitoring and reference optical paths, it is demonstrated that, the correlation value was proportional to the changes of temperature and stress in the monitoring fiber. Experiments result show a maximum temperature error of ±0.1 °C in a temperature range of 20 °C–80 °C, and a maximum stress error of ±1 με in a stress range of 3000–9000 με, and the sensor possessed picosecond order response speed. Measurement experiments of monitoring temperature were carried out on the machine tool. Through the analysis of experimental data, the results indicated that the multi-point temperature variations of the machine tool could be detected by the optical fiber sensor based on optical time offset effectively, the proposed method can detect the multi-point temperature variations synchronously, and it provides a new approach to monitor temperature online based on optical fiber sensor.
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Keywords: OPTICAL FIBER SENSOR; STRESS MEASUREMENT; TIME OFFSET

Document Type: Research Article

Publication date: July 1, 2018

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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