基于金纳米笼的1106 nm被动调<i>Q</i> Nd: GAGG激光器

张斌; 李颖; 刘丙海

doi:10.11884/HPLPB202032.200127

基于金纳米笼的1106 nm被动调Q Nd: GAGG激光器

doi: 10.11884/HPLPB202032.200127

1.
山东大学信息科学与工程学院，济南 250100
2.
山东交通技师学院，山东临沂 276021

基金项目: 山东省自然科学基金项目（ZR2019MF043）

详细信息

作者简介:
张　斌（1993—），男，博士研究生，主要从事调Q和锁模固体激光器及固体拉曼激光器的研究；bin-zhang@mail.sdu.edu.cn

中图分类号: TN248.1
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出版历程
- 收稿日期: 2020-05-17
- 修回日期: 2020-08-04
- 刊出日期: 2020-09-29

1106 nm Q-switched Nd:GAGG laser using gold nanocages as saturable absorbers

1.
School of Information Science and Engineering, Shandong University, Ji’nan 250100, China
2.
Shandong Traffic Technician College, Linyi 276021, China

摘要

摘要: 成功制备了金纳米笼溶液并将其作为饱和吸收体，实现了中心波长为1106 nm的Nd:GAGG激光器的调Q运转。在输出镜透过率为3%的激光器中，在泵浦功率6.70 W下获得的最大平均输出功率为98 mW，此时对应的脉冲重复率为206 kHz，最短脉冲宽度为436 ns；在输出镜透过率为7%的激光器中，当泵浦功率为7.69 W时，得到的最大平均输出功率为121 mW，最短脉冲宽度为370 ns，对应的脉冲重复率为170 kHz。实验结果证明了金纳米笼在近红外波段激光器中用作饱和吸收体的巨大潜力。
- 金纳米笼 /
- 饱和吸收体 /
- 被动调Q /
- 1106 nm /
- Nd:GAGG激光器
Abstract: Using gold nanocages (GNCs) as saturable absorbers (SAs), passively Q-switched Nd:GAGG lasers at 1106 nm were demonstrated. For the laser at T = 3%, the maximum output power of 98 mW was received under the pump power of 6.70 W, with the shortest pulse width of 436 ns and the pulse repetition rate of 206 kHz. Q-switched pulse with the shortest pulse duration of 370 ns, pulse repetition rate of 170 kHz was achieved at transmittance T＝7% under the pump power of 7.69 W with the maximum average output power of 121 mW. These results indicate a great potential of the GNCs as SA in the near-infrared lasers.
- gold nanocages /
- saturable absorber /
- passively Q-switched /
- 1106 nm /
- Nd:GAGG laser

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图 1 金纳米笼的实验表征

Figure 1. Experimental characterization of the GNCs

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图 2 金纳米笼的非线性光学特性

Figure 2. Nonlinear optical properties of the as-prepared GNCs SA

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图 3 金纳米笼为饱和吸收体的Nd:GAGG被动调Q激光器实验装置图

Figure 3. Schematic of diode-pumped GNCs-SA Q-switched Nd:GAGG laser

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图 4 Nd:GAGG激光器输出功率与泵浦功率的关系曲线

Figure 4. Output power characteristics versus pump power of the Nd:GAGG lasers

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图 5 脉冲宽度和重复频率随泵浦功率的变化关系

Figure 5. Change of pulse repetition rate and pulse width with pump power

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图 6 Nd:GAGG被动调Q激光器的单脉冲波形和脉冲序列

Figure 6. Single pulse profiles and pulse trains of GNCs Q-switched Nd:GAGG lasers

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表 1 用GNRs和GNCs作为SA的1106 nm被动调Q激光器

Table 1. Property of the passively Q-switched laser at 1106 nm using GNCs and GNRs as saturable absorbers

type of GNPs	modulation depth/%	saturation power density/（mW/cm²）	maximum output power/mW	shortest pulse width/ns	repetition rate/kHz	references
GNRs	9	0.022	101	481	100	Feng Chao et al, 2017
GNCs	5.3	1.1	121	370	206	This work

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