利用外径不同的常规单模和多模光纤成功制作了一种本征法布里-珀罗干涉型光纤传感器，对其温压响应进行了研究。由材料力学和光弹理论得出了压力响应理论模型，为了增加压力响应灵敏度，在考虑泊松效应导致应变方向的前提下，选择了多模光纤外径较小的结构。实验中传感器采用了经氢氟酸腐蚀外径为120 mm 多模石英光纤，将制作的1 mm 腔长的传感头进行了温度响应实验，温度范围为20 ℃~500 ℃，实验结果表明该传感器对温度有较好的线性响应，光程差响应灵敏度为25 nm/℃，且重复性较好；在常温20 ℃条件下进行了压力响应实验，实验结果表明该传感器具有较好的压力线性响应，其压力响应灵敏度为4.7 nm/MPa。该传感器能够对温度、压力实现较好的响应，同时具备准分布式测量的潜力。

An intrinsic Fabry-Perot interferometric fiber sensor is successfully fabricated by normal single mode fiber and multimode fiber with different outer diameters. Its temperature and pressure response performance is investigated. The pressure responding theoretical model is got by materials mechanics theory and photoelastic theory. Considering the strain direction caused by Poisson effect, the multimode fiber with small diameter is used to improve the pressure sensitivity. In experiments, the diameter of multimode fiber is 120 mm after the fiber is corroded by hydrofluoric acid. The temperature responding experiment is done by this sensor with varied temperature from 20 ℃ to 500 ℃, with 1 mm cavity length. The experiment results show the sensor have a good temperature linear response and repeatability. The temperature sensitivity is 25 nm/℃ . The pressure experiment results are also got at 20 ℃ temperature. The experiment results show the sensor also has a good pressure linear response. The pressure sensitivity is 4.7 nm/MPa in this experiment. This kind of optic fiber sensor can be well responded by temperature and pressure, and with the potential of multiplexing sensors.