描述了一种梳形光纤应变传感器，从理论上导得传感器传输光功率变化和应变之间的线性关系；得到了这种传感器应变灵敏度和梳形结构参数的函数关系。实验得到的结果和理论一致．实验显示出这种传感器没有滞回特性，具有好的单值性、重复性和温度稳定性。 A comb-type optical fiber strain sensor is described, which theoretically leads to a linear relationship between the optical power transmitted by the sensor and the strain. The sensitivity of the sensor is obtained as a function of the comb structure parameters. The experimental results are consistent with the theory. Experiments show that this sensor has no hysteresis characteristics, with good single value, repeatability and temperature stability.