大口径钕玻璃坯片中铂金颗粒的强激光辐照检测

采用输出能量为10 J、脉宽为10 ns、重复频率为10 Hz的Nd:YAG激光器，根据美国NIF、法国LMJ和俄罗斯LUTCH装置的铂金颗粒检测参数，建立了大口径钕玻璃铂金颗粒扫描平台。在此平台上，测试并研究了N31大口径钕玻璃内部的铂金颗粒夹杂物在强激光辐照下的破坏情况。高分辨率光学体视显微镜对铂金颗粒夹杂物破坏后的形貌进行了观测和讨论。初步研究表明，在正常生产工艺条件下生产出的钕玻璃，其内部不存在铂金颗粒夹杂物。当去除铂金的工艺出现异常时，在钕玻璃内部是有可能出现铂金颗粒夹杂物颗粒的。所建立的扫描参数能够将不可见的微颗粒有效地检测出来，从而及时准确反馈除铂金的工艺条件，确保钕玻璃生产的正常进行。

Detection of platinum particles in large diameter Nd:glass blank by high power laser radiation

According to the America's NIF, France's LMJ and Russia's LUTCH device platinum particle detection parameters, a large diameter N31 Nd:glass platinum particle scanning platform was established by using the Nd:YAG laser(10 J, 10 ns, 10 Hz). On this platform, the damage under high power laser irradiation of the inclusion of platinum particles in the large diameter Nd:glass was tested and studied. The morphology of the inclusions in the platinum particles was observed and discussed by using the high resolution optical stereo microscope. Preliminary studies show that Nd:glass produced under normal production conditions does not contain platinum particles when the process of removing platinum inclusions. During production is abnormal, it is possible that platinum inclusions are contained inside the Nd:glass. The scanning parameters established in this paper can effectively detect invisible inclusions, and timely and accurately reflect platinum process conditions to ensure the normal production of Nd:glass.