高功率激光装置的多路红外激光脉冲波形测量系统由光纤取样耦合、传输、合束、光电转换和数据采集处理单元构成，采用缩束与光学成像系统的光纤耦合方法克服了高功率激光束长距离传输后的指向漂移，针对正弦调频脉冲输出，实验和理论分析了测试光路存在像差、测试空间不同位置时间特性差异和传感器带宽等因素对测试的影响。实验结果表明，采用光纤取样的时间波形测量方式可以准确地反映基频调频脉冲全口径积分波形的轮廓从而实现基频调频脉冲波形监测。

The configuration and principle of the temporal profile measurement system are introduced, which are used for multi-beam infrared laser of the high power laser facility. The system is composed of sampling and coupling, fiber transmission, multiplexing coupler, photoelectric conversion and data acquisition unit. The reduced beam and optics imaging method are adopted in sampling of optical fiber in order to solve the problem of the great drift of beams. Because of the laser beam of sinusoidal frequency modulation, the influence of the temporal profile on measurement is systematically evaluated. Optical aberration caused by diagnostic system, the temporal characteristic of different regions, and the bandwidth of sensor are analyzed experimentally and theoretically. The experimental results show that the measurement system of temporal profile based on optical fiber can provide the profile of integral entirely beam of frequency modulation, and monitor the profile reliability.