大口径高能脉冲激光参量测量装置的精度研究

Study on parameter measurement precision of high energy laser beam with large aperture

为了研究高能激光外场特性,研制了一套用于测量大口径高能量脉冲激光参量的测量装置。该装置包括一套自校准系统,能够对其主要系数进行现场校准。采用理论分析和实验研究的方法,对装置的测量原理、性能和结构进行了描述,并对测量误差进行了理论分析,证明了该装置能够同时测量高能激光光强分布和能量值,最后采用校准实验的方法对测量误差进行了验证和分析。该装置对激光脉冲能量和光强分布的测量误差分别为4.5%和5%。结果表明,该装置有较高的测量精度和可靠性,能广泛用于大口径高能量脉冲激光外场测试。

In order to study the field characteristics of high energy laser, a device for measuring parameters of large- caliber high energy pulsed laser was developed. The device includes a set of autocalibration system that can conduct on-site calibration of its main coefficients. The measuring principle, performance and structure of the device were described, and the measurement error was analyzed by theoretical analysis and experimental verification. The equipment can simultaneously measure the laser energy and intensity distribution. Finally, measurement errors were verified and analyzed by the method of calibration experiments. Measurement errors of laser energy and intensity distribution are 4.5% and 5% respectively. The results show that the equipment has excellent precision, reliability and stability, which could be used in field measurement.