量子电子学报 ›› 2023, Vol. 40 ›› Issue (1): 79-84.doi: 10.3969/j.issn.1007-5461.2023.01.009

• 激光技术与器件 • 上一篇    下一篇

γ 射线辐照对 Cr 掺杂 MgAl2O4 晶体光谱特征的影响

孙贵花1∗ , 张庆礼1 , 罗建乔1 , 高进云1 , 刘文鹏1 , 李加红1,2 , 陈迎迎1,2   

  1. ( 1 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 安徽省光子器件与材料重点实验室, 安徽 合肥 230031; 2 中国科学技术大学, 安徽 合肥 230026 )
  • 收稿日期:2021-04-23 修回日期:2021-07-13 出版日期:2023-01-28 发布日期:2023-01-28
  • 通讯作者: E-mail: ghsun@aiofm.ac.cn E-mail:E-mail: ghsun@aiofm.ac.cn
  • 作者简介:孙贵花 ( 1984 - ), 女, 山东人, 博士, 副研究员, 主要从事晶体生长及性能方面的研究。 E-mail: ghsun@aiofm.ac.cn
  • 基金资助:
    先进激光技术安徽省实验室主任基金 (AHL20220ZR04)

Effect of γ-ray irradiation on spectral characteristics of Cr-doped MgAl2O4 crystal

SUN Guihua 1∗ , ZHANG Qingli 1 , LUO Jianqiao 1 , GAO Jinyun 1 , LIU Wenpeng 1 , LI Jiahong 1,2 , CHEN Yingying 1,2   

  1. ( 1 Anhui Provincial Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China )
  • Received:2021-04-23 Revised:2021-07-13 Published:2023-01-28 Online:2023-01-28

摘要: 为评估辐照对 Cr:MgAl2O4 晶体光谱特性的影响, 采用辐照剂量为 100 Mrad 的 60Co γ 射线照射抛光后 的 Cr: MgAl2O4 晶体样品片, 测量了辐照前后的拉曼光谱、透射光谱和荧光特性, 并对辐照前后光谱变化的原因 进行了分析。研究结果表明: 样品的拉曼振动峰值的位置和强度都受到辐照的影响, 但振动峰的数量没有改变; 由于色心的吸收, 辐照后 250∼600 nm 波长范围内的透射率均明显降低; 辐照前后样品的荧光发射峰位一致, 但 辐照后荧光强度明显降低, 同时辐照后的荧光寿命显著增加。

关键词: 激光晶体, γ 射线辐照, Cr:MgAl2O4 晶体, 光谱性能

Abstract: In order to evaluate the effect of irradiation on the spectral properties of Cr:MgAl2O4 crystal, Raman spectra, transmittance spectra and fluorescence properties of the polished Cr:MgAl2O4 crystal were measured before and after γ irradiation with a dose of 100 Mrad, and the mechanism of the irradiation effect were analyzed. The results show that the position and intensity of Raman vibration peak are both affected by irradiation, but the number of vibration peaks does not change. And due to the absorption of color center, the transmittance in the wavelength range of 250-600 nm decreases obviouslyafter γ irradiation. The fluorescence emission peaks of the samples after irradiation are consistent with those of before irradiation, while the fluorescence emission intensity decreases significantly and the fluorescence lifetime increases significantly after irradiation. 

Key words: laser crystal, γ irradiation, Cr:MgAl2O4 crystal, spectral properties

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