A high temperature real-time accurate monitoring system based on photoelectric oscillation had been proposed and demonstrated. We use the narrow bandwidth characteristics of phase-shifting fiber Bragg grating (PS-FBG) to generate stable photoelectric oscillation signals. After the PS-FBG is ceramic packaged to adapt to and apply to 500 °C high temperature, the wavelength shift caused by temperature change is precisely responded by narrow linewidth PS-FBG, so the change of photoelectric oscillation signal can be monitored in real time with high precision. The experimental results show that the sensitivity is −1.24 GHz/°C and the linearity is −0.99953. The system has a resolution of 0.0083 °C. The test system has excellent potential application value in precise control of high temperature environment such as metal smelting, crystal growth, chemistry and pharmaceutical engineering.

中文翻译：

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基于移相光栅和光电振荡的高温精确监测

提出并论证了一种基于光电振荡的高温实时精确监测系统。我们利用相移光纤布拉格光栅（PS-FBG）的窄带宽特性来产生稳定的光电振荡信号。PS-FBG陶瓷封装后适应并适用于500℃高温，窄线宽PS-FBG精确响应温度变化引起的波长漂移，实时监测光电振荡信号的变化高精度。实验结果表明，灵敏度为-1.24 GHz/°C，线性度为-0.99953。该系统的分辨率为 0.0083 °C。该测试系统在金属冶炼、晶体生长、