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硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (11): 3768-3776.

所属专题: 玻璃

• 玻璃光纤 • 上一篇    下一篇

Nb2O5对Nd3+掺杂锗酸盐玻璃光谱性能的影响

蒋晓琦1,2, 孙焰1, 王亚飞1, 王欣1, 陈树彬1, 胡丽丽1, 师彦春3, 郭爱民3   

  1. 1.中国科学院上海光学精密机械研究所,高功率激光单元技术实验室,上海 201800;
    2.上海大学,材料科学与工程学院,上海 201900;
    3.中信金属股份有限公司,北京 100004
  • 收稿日期:2022-08-16 修订日期:2022-09-20 出版日期:2022-11-15 发布日期:2022-12-12
  • 通信作者: 王 欣,博士,高级工程师。E-mail:xinwang@siom.ac.cn
  • 作者简介:蒋晓琦(1997—),男,硕士研究生。主要从事光学玻璃方面的研究。E-mail:jiangxiaoqi@siom.ac.cn
  • 基金资助:
    中信铌钢发展奖励基金(2021310034000559)

Effect of Nb2O5 on Spectral Properties of Nd3+ Doped Germanate Glass

JIANG Xiaoqi1,2, SUN Yan1, WANG Yafei1, WANG Xin1, CHEN Shubin1, HU Lili1, SHI Yanchun3, GUO Aimin3   

  1. 1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China;
    2. School of Materials Science and Engineering, Shanghai University, Shanghai 201900, China;
    3. Citic Metal Co., Ltd., Beijing 100004, China
  • Received:2022-08-16 Revised:2022-09-20 Online:2022-11-15 Published:2022-12-12

摘要: 蓝光激光器在彩色激光显示、高密度光储存、海洋资源探测、水下通信以及生物科技等领域具有广泛的应用前景。目前较为成熟的Yb3+掺杂光纤激光器倍频后仅能获得~490 nm蓝绿光,因此如何得到接近450 nm的纯蓝光激光器是目前急需解决的问题。Nd3+:4F3/24I9/2能级跃迁产生的0.9 μm光经倍频后可获得~450 nm光,并可应用于蓝光激光器,但该跃迁产生的光所占荧光分支比较低。本文系统研究了1%(质量分数)Nd2O3掺杂50GeO2-(20-x)PbO-15BaO-15ZnO-xNb2O5(x%=0%,2.5%,5%,10%,15%,摩尔分数)玻璃的吸收光谱、荧光光谱和荧光寿命,计算了相应的Judd-Ofelt强度参数以及增益带宽。研究发现,Nb2O5的加入会使Nd3+在900 nm荧光峰的吸收截面、发射截面、有效线宽和荧光分支比增加。当Nb2O5浓度为10%(摩尔分数)时,Judd-Ofelt强度参数Ω2=5.91×10-20 cm2,光谱质量参数χ=1.01,荧光分支比为42.9%。综上所述,Nb2O5能提高Nd3+ 0.9 μm的荧光分支比,从而倍频获得纯蓝光(450 nm),有利于蓝光激光器的发展及应用。

关键词: Nd3+, Nb2O5浓度, 锗酸盐玻璃, 光谱特性, Judd-Ofelt强度参数, ~0.9 μm荧光

Abstract: Blue laser has a wide range of application prospects in the fields of color laser display, high-density optical storage, exploration of marine resource, underwater communication and biomedical sciences, etc. However, the relatively mature Yb3+ doped fiber laser can only obtain blue green (~490 nm) laser after frequency doubling. Therefore, it is an urgent issue to obtain a pure blue laser close to 450 nm. The 0.9 μm fluorescence generated by the 4F3/24I9/2 level transition of Nd3+ can obtain the pure blue laser output of ~450 nm after frequency doubling, which has excellent application potential in the field of blue laser. However, the fluorescence generated by this transition occupies a low fluorescence branching raito. In this paper, the absorption spectrum, fluorescence spectrum and fluorescence lifetime of 1% (mass fraction) Nd2O3 doped 50GeO2-(20-x)PbO-15BaO-15ZnO-xNb2O5 (x%=0%, 2.5%, 5%, 10%, 15%,mole fraction) glass were systematically studied, and the corresponding Judd-Ofelt intensity parameters and gain bandwidth were calculated. It is found that the 900 nm absorption cross section, emission cross section, effective linewidth and fluorescence branching ratio of Nd3+ increase with the doping of Nb2O5. When the concentration of Nb2O5 is 10% (mole fraction), Judd-Ofelt intensity parameter Ω2=5.91×10-20 cm2, the spectral quality parameter χ=1.01, and the fluorescence branching ratio is 42.9%. In summary, 0.9 μm fluorescence branching ratio of Nd3+ can be raised by Nb2O5, so as to obtain pure blue light (450 nm) by frequency doubling, which is beneficial to the development and application of blue laser.

Key words: Nd3+, Nb2O5 concentration, germanate glass, spectral property, Judd-Ofelt intensity parameter, ~0.9 μm fluorescence

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