Near-infrared Spectra and Laser Parameters of Yb3+ and Na+ Codoped CaF2-SrF2 Crystal

Jie YANG; Jian-bin ZHAO; Yi-yin LIU; Long YANG; Yang-xiao WANG; Li-guo TANG; He FENG; Fang-fang RUAN; Jian-gang ZHENG; Li-he ZHENG; Liang-bi SU

doi:10.37188/CJL.20210358

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Near-infrared Spectra and Laser Parameters of Yb³⁺ and Na⁺ Codoped CaF₂-SrF₂ Crystal

Synthesis and Properties of Materials | 更新时间：2022-04-07

- Near-infrared Spectra and Laser Parameters of Yb³⁺ and Na⁺ Codoped CaF₂-SrF₂ Crystal
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 3, Pages: 341-349(2022)
- 作者机构：
  
  1.云南大学　物理与天文学院，云南省高校光电器件工程重点实验室，云南　昆明　650500
  2.中国科学院　上海硅酸盐研究所，上海　201899
  3.上海大学　材料科学与工程学院，上海　200444
  4.杭州医学院　医学影像学院，浙江　杭州　310053
  5.中国工程物理研究院　激光聚变研究中心，四川　绵阳　621900
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(U1830104;62165017);Science and Technology Commissions of Shanghai Municipality(20501110300);CAS Interdisciplinary Innovation Team(JCTD-2019-12);Instrument Developing and the Strategic Priority Programs of CAS(ZDKYYQ20210002;XDA25020312);Yunnan Province Basic Research Project(202101AT070162);The Opening Project of State Key Laboratory of Transparent Opto-functional Inorganic Materials CAS(KLTOIM202001);Yunnan College Students’ Innovative Entrepreneurial Training Project(202010673075);Graduate Research Innovation Fund Project of Yunnan University
- DOI：10.37188/CJL.20210358
  CLC： O482.31
- Received：14 November 2021，
  
  Revised：04 December 2021，
  
  Published：2022-03
- 稿件说明：
移动端阅览
Jie YANG, Jian-bin ZHAO, Yi-yin LIU, et al. Near-infrared Spectra and Laser Parameters of Yb³⁺ and Na⁺ Codoped CaF₂-SrF₂ Crystal[J]. Chinese journal of luminescence, 2022, 43(3): 341-349.
DOI：

Jie YANG, Jian-bin ZHAO, Yi-yin LIU, et al. Near-infrared Spectra and Laser Parameters of Yb³⁺ and Na⁺ Codoped CaF₂-SrF₂ Crystal[J]. Chinese journal of luminescence, 2022, 43(3): 341-349. DOI： 10.37188/CJL.20210358.

摘要

研究了15%Yb

20%Na∶CaF

-SrF

混晶(Yb

Na∶CaF

-SrF

CaF

∶SrF

=1∶1)的近红外光谱和激光参数特性。研究显示，Yb

Na∶CaF

-SrF

混晶在974 nm处吸收带宽为22 nm，吸收系数为13.09 cm

-1

，吸收截面为0.31×10

-20

。Yb

离子在CaF

-SrF

基质中主发射峰中心波长位于1 010 nm，肩峰中心波长位于1 036 nm，发射带宽为56 nm，在

5/2

→

7/2

能级之间跃迁对应的荧光寿命为228 μs。采用激发波长980 nm时，1 010 nm处发射截面为6.52×10

-20

、1 036 nm处发射截面为4.11×10

-20

，分别是915 nm激发时的1.49倍与1.68倍；实现激光输出波长1 036 nm处达到布居反转时所需要激发的激活粒子数的最小分数

min

为0.34%，在零声子线974 nm处的饱和泵浦功率密度

sat

为290.58 kW·cm

-2

。上述结果表明，Yb

Na∶CaF

-SrF

混晶在近红外波段高能量激光系统中具有潜在应用前景。

Abstract

15%Yb

20%Na∶CaF

-SrF

(Yb

Na∶CaF

-SrF

CaF

∶SrF

=1∶1) single crystal with the ratio of 1∶1 for CaF

and SrF

is characterized by near-infrared spectra followed by the evaluation of laser parameters. The absorption bandwidth centered at 974 nm is 22 nm

together with absorption coefficient of 13.09 cm

-1

and absorption cross section of 0.31×10

-20

. The fluorescence lifetime corresponding to energy transfer channel of

5/2

→

7/2

is measured as 228 μs. The main emission band of Yb

ions in Yb

Na∶CaF

-SrF

host is centered at 1 010 nm with a shoulder band peaked at 1 036 nm. The emission bandwidth under the excitation wavelength of 915 nm is fitted to be 56 nm by using the Lorentz method. The emission cross section reaches 6.52×10

-20

at 1 010 nm and 4.11×10

-20

at 1 036 nm under an excitation wavelength of 980 nm. On the other hand

the emission cross sections get 1.49 times and 1.68 times reduction at 1 010 nm and 1 036 nm under the excitation wavelength of 915 nm when compared with those under the excitation wavelength of 980 nm. Furthermore

the inversion population

min

of 0.34% and the saturation pump power of 290.58 kW·cm

-2

are obtained under the excitation wavelength of 980 nm. It indicates that high dopant level of Yb

in Yb

Na∶CaF

-SrF

single crystal could lead to the potential applications in near-infrared high energy laser system.

关键词

Keywords

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