为探索光纤布拉格光栅在高能激光参数测量方面的应用,通过实验和数值模拟研究分析了其在高能激光辐照下的响应特性。通过解传热方程,获得了光纤布拉格光栅在高能激光辐照下的热响应特性。利用一个光纤光栅解调仪,记录了光纤布拉格光栅在高能激光辐照下的波长漂移现象。实验结果表明:在一定的功率密度范围内,光纤布拉格光栅的最大波长漂移与其所受的辐照功率密度成线性关系,该结果与理论模拟相符。 In order to explore the application of fiber Bragg gratings in the measurement of high-energy laser parameters, the response characteristics under high-energy laser irradiation were analyzed through experiments and numerical simulation. By solving the heat transfer equation, the thermal response characteristics of fiber Bragg gratings under high-energy laser irradiation are obtained. Using a fiber grating demodulator, the wavelength shift of fiber Bragg gratings under high-energy laser irradiation was recorded. The experimental results show that the maximum wavelength shift of a fiber Bragg grating linearly depends on the irradiation power density under a certain power density range. The result is consistent with the theoretical simulation.