1.8 mJ高倍率Nd:YAG板条皮秒激光放大器

王金川; 李密; 杜佳林; 汪丹; 李腾龙; 王君涛; 周唐建; 尚建力; 高清松

doi:10.11884/HPLPB202234.210562

1.8 mJ高倍率Nd:YAG板条皮秒激光放大器

doi: 10.11884/HPLPB202234.210562

王金川^{1, 2, 3,},
李密^{1, 2},
杜佳林^{1, 2},
汪丹^{1, 2},
李腾龙^{1, 2},
王君涛^{1, 2, ,},
周唐建^{1, 2},
尚建力^{1, 2},
高清松^{1, 2}

1.
中国工程物理研究院应用电子学研究所，四川绵阳 612900
2.
中国工程物理研究院高能激光科学与技术重点实验室，四川绵阳 612900
3.
中国工程物理研究院研究生院，北京 100088

基金项目: 中国工程物理研究院创新发展基金项目(C-2021-CX20200030)

详细信息

作者简介:
王金川，chuanjinwang718@foxmail.com

通讯作者:
王君涛，wjt_caep@126.com

中图分类号: TN248.1
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- 被引次数: 0
出版历程
- 收稿日期: 2021-12-15
- 修回日期: 2022-02-18
- 网络出版日期: 2022-03-31
- 刊出日期: 2022-06-15

1.8 mJ high magnification Nd:YAG slab picosecond laser amplifier

Wang Jinchuan^{1, 2, 3
,},
Li Mi^{1, 2},
Du Jialin^{1, 2},
Wang Dan^{1, 2},
Li Tenglong^{1, 2},
Wang Juntao^{1, 2
, ,},
Zhou Tangjian^{1, 2},
Shang Jianli^{1, 2},
Gao Qingsong^{1, 2}

1.
Institute of Applied Electronics, CAEP, Mianyang 612900, China
2.
Key Laboratory of Science and Technology on High Energy Laser, CAEP, Mianyang 612900, China
3.
Graduate School of China Academy of Engineering Physics, Beijing 100088, China

摘要

摘要: 设计了一种高倍率的固体皮秒脉冲激光放大器，采用Nd:YAG板条作为激光增益介质。借助板条结构的角度选通结构，搭建了板条五通放大系统，实现了对注入皮秒脉冲激光的高倍率放大。种子源工作在脉冲模式，放大器泵浦源在连续模式工作。皮秒光纤激光器可以在不同的重复频率下工作，脉冲宽度为13.4 ps。种子光经过隔离和耦合系统之后，注入板条的单脉冲能量为25 nJ。当种子源工作重复频率为24.46 MHz时，板条放大器输出平均功率377 W，单脉冲能量15.5 μJ；当种子源工作重复频率为49.8 kHz时，板条放大器输出平均功率89 W，单脉冲能量1.8 mJ，峰值功率为134 MW，放大倍率达到7.2×10⁴。
- 激光器 /
- 皮秒激光 /
- 固体激光器 /
- 高倍率 /
- 五通放大
Abstract: In this study, we design a high-magnification solid-state picosecond pulse laser amplifier in which the gain medium is Nd:YAG slab. We achieve the five-pass amplification of the picosecond pulse laser through the slab multi-angle magnification technology. The seed source works in pulse mode, and the amplifier pump works in continuous mode. Picosecond fiber laser can work at different repetition rates with 13.4 ps pulse duration. After the seed laser passes through the isolation and coupling system, the single-pulse energy injected into the slab is 25 nJ. When repetition frequency of the seed source is 24.46 MHz, the output power is 377 W, the single-pulse energy is 15.5 μJ. When repetition frequency of the seed source is 49.8 kHz, a laser output power of 89 W is obtained with single-pulse energy 1.8 mJ and peak power 134 MW. The magnification is up to 7.2×10⁴.
- laser /
- picosecond laser /
- solid-state laser /
- high magnification /
- five-pass amplification

HTML全文

图 1 Zig-zag板条光路示意图

Figure 1. Optical path of laser beam in zig-zag slab

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图 2 增益区内不同位置处的小信号增益系数

Figure 2. Theoretical result of small signal gain coefficient distribution

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图 3 材料内部功率随位置变化

Figure 3. Power distribution of different positions within slab

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图 4 高倍率激光放大器实验装置示意图

Figure 4. Schematic of experimental setup

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图 5 种子源输出光谱

Figure 5. Spectra of seed laser

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图 6 五通放大系统输出特性曲线

Figure 6. Output characteristic curves of laser of five-pass amplification

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图 7 激光放大系统输出特性曲线

Figure 7. Output characteristic curves of laser amplifier system

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表 1 不同的传播周期与其对应的选通角

Table 1. Incident angle (θ) for different propagation cycle (N)

N θ/(°)

12 45.9
13 42.1
14 38.5
15 34.4
16 31.2
17 28.2
18 25.4
19 23.6

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