钕玻璃宽带激光放大能量提取效率研究

范广鑫; 隋展; 张彬; 高妍琦

doi:10.11884/HPLPB201931.190095

钕玻璃宽带激光放大能量提取效率研究

doi: 10.11884/HPLPB201931.190095

1.
中国工程物理研究院上海激光等离子体研究所, 上海 201800
2.
四川大学电子信息学院, 成都 610064

基金项目:

科学挑战计划项目 TZ2016005

国家自然科学基金项目 11604317

国家自然科学基金项目 11604318

国家自然科学基金项目 11804321

详细信息

作者简介:
范广鑫(1993—), 男，硕士研究生，从事高功率激光技术应用研究; fgx0792@163.com

中图分类号: 140.3055
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- 被引次数: 0
出版历程
- 收稿日期: 2019-04-09
- 修回日期: 2019-08-26
- 刊出日期: 2019-11-15

Energy extraction efficiency of broad-band laser in neodymium glass laser amplifiers

1.
Shanghai Institute of Laser Plasma, CAEP, Shanghai 201800, China
2.
College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China

摘要

摘要: 基于钕玻璃宽带脉冲激光放大模型，采用数值模拟的方法，研究了钕玻璃放大器对不同输入光通量、不同脉宽以及不同带宽(或波长分布)脉冲激光放大的能量提取效率。计算结果表明，钕玻璃宽带放大能量提取效率随着输入光通量的增加而提高，并最终趋于某一定值。对于以均匀加宽为主的介质，随着带宽的增加，能量提取效率逐渐下降；对于以非均匀加宽为主的介质，随着带宽的增加，能量提取效率先逐渐升高，达到最大值后开始下降。对于均匀加宽与非均匀加宽线宽比为0.1的混合加宽介质，在饱和通量输入条件下，使用宽带激光能够带来大约80%的效率提升。
- 宽带激光 /
- 能量提取效率 /
- 钕玻璃 /
- 放大模型
Abstract: Based on the broad-band pulsed laser amplification model of neodymium glass, the relationship between energy extraction efficiency of the pulsed laser amplification and input fluence, pulse widths and spectral bandwidths (or wavelength distributions) was studied by numerical simulation. The calculation results show that the energy extraction efficiency of the broadband amplification in neodymium glass increases with the increase of the input luminous flux, and finally tends to a certain value. For the medium with uniform broadening, the energy extraction efficiency decreases with the increase of the bandwidth. For the medium with non-uniform broadening, the energy extraction efficiency increases gradually with the increase of the bandwidth, reaching the maximum value, after which it declines. For a mixed widened medium with a uniform widened to non-uniform widened linewidth ratio of 0.1, using a broadband laser can achieve an efficiency improvement of approximately 80% under saturated flux input conditions.
- broadband laser /
- energy extraction efficiency /
- neodymium glass /
- amplification model

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图 1 钕玻璃的谱线加宽机制

Figure 1. Spectral line broadening mechanism of neodymium glass

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图 2 输出能量密度随增益介质长度的变化

Figure 2. Output energy density varies with gain medium length

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图 3 能量提取效率随输入光通量的变化

Figure 3. Energy extraction efficiency varies with input luminous flux

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图 4 能量提取效率随脉宽的变化

Figure 4. Energy extraction efficiency varies with pulse width

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图 5 小信号输入时与饱和通量输入时能量提取效率与Δν_L的关系

Figure 5. Relationship between energy extraction efficiency and Δν_L for small signal input and saturated flux input

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图 6 输出脉冲的光谱与时间波形

Figure 6. Spectral and time waveform of the output pulse

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图 7 小信号输入时与饱和通量输入时能量提取效率与Δν_L的关系

Figure 7. Relationship between energy extraction efficiency and Δν_L for small signal input and saturation flux input

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表 1 N31型钕玻璃的基本参数

Table 1. Basic parameters of N31 neodymium glass

σ/10^－20 cm² τ_rad/μs Δλ_eff/nm n_{1053 nm} τ_p/ns τ_f/ns

3.8 351 25.8 1.535 50 0.25

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参考文献(11)

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