脉冲/连续高功率激光光斑分布阵列探测器

通过测量发射到远场的激光功率密度时空分布给出所需要的到靶总功率、光束质量、桶中功率、功率时间曲线等关键指标参数，是目前准确评价激光系统性能的重要技术手段。介绍了一种基于光电探测器阵列实现近红外脉冲激光功率密度时空分布的测量方法，可以实现900~1700 nm波长、动态范围大于2000倍的激光光斑参数测量。该阵列探测器具有测量面积大、单元一致性好、测量精度高等特点，并可同时实现脉冲和连续激光参数测试要求。给出了阵列探测器的总功率测量结果，测量值与激光器输出功率偏差在5%以内，且激光光斑分布测量结果准确可靠。该阵列探测器已在多套激光系统的参数测试中得到成功应用，可以作为响应波段内的脉冲/连续激光光斑参数测试一种有效技术方案。

Detector array for measuring spot distribution of high power continuous and pulsed laser

It is an important technical means to accurately evaluate the performance of laser system by measuring the spatio-temporal distribution of laser power density emitted to the far field and obtaining the key index parameters such as total power on the target, beam quality, power in the bucket and power-time curve. A method for measuring the spatio-temporal distribution of near infrared pulse laser power density based on photodetector array is introduced. The detector array can be used to measure laser spot parameters in the wavelength range of 900 nm to 1700 nm with dynamic range more than 2000 times. The detector array has the characteristics of good unit consistency and high measurement accuracy, large measurement area, and can meets the needs of pulse and continuous laser parameter measurement. The experimental results for performance of the detector array indicate that the deviation between the measured value and the laser output power is less than 5%, and the measurement results of laser spot distribution are accurate and reliable. The detector array has been successfully applied in the parameter test of several laser system, can be used as an effective technical scheme for the measurement of pulse and continuous laser spot parameters in response band.