几种光学材料γ总剂量辐射效应

Total ionizing dose effects of optical materials in solid state laser

摘要:

针对应用于某种全固化激光器的4种关键光学材料Nd:YAG晶体、Cr:YAG晶体、无膜窗口玻璃(UBK7)以及部分反射镀膜玻璃在γ总剂量辐照前后光学特性的变化情况，分析获得了几种光学材料的γ总剂量辐照效应，并对该全固化激光器抗γ总剂量辐射能力进行了预估。实验结果表明：Nd:YAG晶体对γ总剂量辐照敏感，抗辐射性能较差，不宜用于在较强辐射环境下工作的固态激光器设计，而Cr:YAG、无膜窗口玻璃以及部分反射镀膜玻璃γ总剂量辐照后性能参数变化小，抗辐射性能良好，可考虑在较强γ辐射环境下工作的全固化激光器设计选用。

Abstract:

Changes of the transmittance of several optical materials used in some solid state laser design are measured in total ionizing dose irradiation experiment. The radiation effects of these optical materials are obtained through analysis, and the abilities of anti-total ionizing dose irradiation for the solid state laser are estimated. The experimental results indicate that, Nd:YAG is susceptive to theγrays irradiation, which would lead to the decline of laser transmittance and permeability significantly, therefore, Nd:YAG does not meet the requirements of the laser design; while for UBK7，plated UBK7 and Cr:YAG, their transmittance and permeability show little changes underγrays irradiation，and they are suitable for engineering design.