中文摘要：

利用CO2激光脉冲对标准单模光纤（SMF）单向形成较小的几何形变，把部分基模能量耦合到光纤包层，制作了一种新型的在线型Michelson干涉传感器。理论分析了这种几何微扰激发的包层模特性，并利用芯模-包层模较大的热光系数差，把这种传感器应用于高温测量。实验结果表明，这种干涉传感器的温度灵敏度为0．0937nm／℃，并且在800℃温度范围内具有良好的线性和重复性。这种制作简单、结构稳定、体积小和灵敏度高的全光纤在线型Michelson温度传感器将具有较大的潜在应用价值。

英文摘要：

A novel all-fiber inline Michelson interferometer by using CO2 laser pulses to introduce edgedeformation in single mode fiber is demonstrated. The simple fabrication technique can couple a part of light from the core mode into the fiber cladding, and the coupling mechanism is analyzed theoretically. Based on the larger thermal optical coefficient difference between the core mode and the cladding modes, the interferometer can be used for high temperature measurement. The experimental results show that the temperature sensitivity of the sensor could be - 0. 093 7 nm/℃, and it exhibits good linearity and repetition within 800 ℃. Such an all-fiber inline Michelson interferometer with simple fabrication, good stability, small size and high sensitivity may find potential applications in national defense and civilian industry.