High-precision temperature sensor

The invention relates to a high-precision temperature sensor and belongs to the technical field of optical fiber sensors. The high-precision temperature sensor mainly comprises a pumping source (1), an optical wavelength division multiplexer (2), an Er-doped fiber (3) and the like. The high-precision temperature sensor provided by the invention uses a sinusoidal signal as a modulating signal, cannot produce high-frequency interference and has the characteristics of more reliable work, high sensing precision and wide application range. 本发明的种高精度温度传感器属于光纤传感器技术领域。其主要结构有泵浦源(1)、光波分复用器(2)、掺铒光纤(3)等。本发明用正弦信号作为调制信号，不会产生高频干扰，具有工作更可靠、传感精度高、应用范围广等特点。