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Laser safety evaluation for high-energy laser interaction with solids

机译：激光安全评估高能激光相互作用与固体

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摘要

Laser safety regulating the deployment of kW-class high-energy laser (HEL) technologies in outdoor applications can rapidly cause significant planning and operations issues due to the ranges involved. Safety templates based on a simplistic approach of assuming a continuous wave laser beam incident on a highly reflective totally flat solid surface of infinite size can easily result in ranges of tens of kilometers for kW-class lasers. Due to the complexity of HEL-matter interactions, the assumptions underlying the aforementioned approach are, however, deemed inappropriate. We identify a more suitable approach, which assumes a time-variant reflection pattern as well as a change in the variance of beam divergence as it reflects from the target's surface. Based on experimental results, we instead propose to assess the nominal ocular hazard distance by applying the American National Standard Institute rules for time-variant multipulse laser exposure and using measured divergence angles from the target's surface. The resulting safety templates, thus, exhibit a higher fidelity with respect to the behavior of the reflection patterns while reducing the hazard zones.
机译：激光安全调节百级高能量激光器（HEL）技术在户外应用中的部署可以迅速引起涉及范围的重要规划和运营问题。基于一种简单方法的安全模板，假设在无限尺寸的高反射性完全平坦的固体表面上的连续波激光束可以容易地导致kW级激光器的数十公里范围。由于HEL-物质相互作用的复杂性，然而，上述方法的假设是视认为不恰当。我们识别更合适的方法，该方法假设时间变体反射模式以及光束发散方差的变化，因为它从目标表面反射。根据实验结果，我们建议通过应用美国国家标准研究所的时变多孔激光暴露，并使用来自目标表面的测量的偏差角度来评估名义上眼影距离。因此，由此产生的安全模板在减少危险区域的同时，对反射模式的行为表现出更高的保真度。

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