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学者姓名：李强
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Abstract ：
We report what we believe to be a novel circular-clad large- size rectangular core crystalline waveguide Yb:YAG laser. The waveguide has a rectangular core of Yb:YAG with 400 x 400 mu m2 and a thin rod-shaped cladding of Er:YAG with a diameter of 1.2 mm and a length of 65 mm. The circular-clad structure has improved the pump absorption efficiency of the waveguide. A concave-convex cavity is designed to overcome the power limitation of thermal lens effect on the large-size rectangular core single-mode waveguide. A waveguide oscillator obtains a 1030 nm laser with an average power of 110 W and a beam quality factor of Mx2xMy2 =1.07 x 1.05, with optical-optical efficiency and slope efficiency of 54% and 67%, respectively. The laser performance is attributed to the double-clad structure and the good thermal management. The results confirm that the waveguide has high potential in power expansion and pulse laser amplification. (c) 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
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| GB/T 7714 | Li, Shuai , Huang, Yukun , Nie, Xiaolu et al. High-efficiency and high-brightness circular-clad , large-size, rectangular core crystalline waveguide Yb:YAG laser [J]. | OPTICS LETTERS , 2025 , 50 (5) : 1665-1668 . |
| MLA | Li, Shuai et al. "High-efficiency and high-brightness circular-clad , large-size, rectangular core crystalline waveguide Yb:YAG laser" . | OPTICS LETTERS 50 . 5 (2025) : 1665-1668 . |
| APA | Li, Shuai , Huang, Yukun , Nie, Xiaolu , Zhao, Ding , Zhu, Zhanda , Lei, Hong et al. High-efficiency and high-brightness circular-clad , large-size, rectangular core crystalline waveguide Yb:YAG laser . | OPTICS LETTERS , 2025 , 50 (5) , 1665-1668 . |
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Abstract ：
We report an effective method to reduce the impact of polarization state changes caused by thermal birefringence in intra-cavity frequency-doubled laser. The laser consists of a diode side pumped Nd:YAG module, an acousto-optic modulator Q-switch, and an LBO crystal used for SHG generation in 532 nm laser. The effect of thermal birefringence originated by the Nd:YAG rod with concave-shape end surfaces on SHG efficiency is compensated by the insertion of a lambda/8 plate into the cavity. At the repetition frequency of 9 kHz, the 532 nm laser achieves a maximum output power of 23.8 W, a pulse duration of 60 ns (FWHM), and a beam quality factor of Mx 2 x My 2 = 1.52 x 1.43. Compared with the lambda/4 plate and without plate, the maximum average power of the laser with the lambda/8 plate has increased by 22.7% and 66.4%, respectively, the beam quality factor has also been greatly improved correspondingly. This method provides a new solution for lasers to compensate thermally induced birefringence.
Keyword ：
intra-cavity frequency doubling intra-cavity frequency doubling power escalation power escalation birefringence compensation birefringence compensation
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| GB/T 7714 | Li, Shuai , Fang, Zijun , Peng, Majun et al. Power scaling of intra-cavity Nd:YAG/LBO laser at 532 nm by birefringence compensation [J]. | LASER PHYSICS LETTERS , 2024 , 21 (8) . |
| MLA | Li, Shuai et al. "Power scaling of intra-cavity Nd:YAG/LBO laser at 532 nm by birefringence compensation" . | LASER PHYSICS LETTERS 21 . 8 (2024) . |
| APA | Li, Shuai , Fang, Zijun , Peng, Majun , Zhu, Zhanda , Lei, Hong , Li, Qiang . Power scaling of intra-cavity Nd:YAG/LBO laser at 532 nm by birefringence compensation . | LASER PHYSICS LETTERS , 2024 , 21 (8) . |
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| GB/T 7714 | Li, Guotai , Han, Jiakun , Li, Shuai et al. Nonlinear-mirror mode-locked crystal waveguide laser by intracavity fourth-harmonic loss modulation (vol 48, pg 6064, 2024) [J]. | OPTICS LETTERS , 2024 , 49 (7) : 1810-1810 . |
| MLA | Li, Guotai et al. "Nonlinear-mirror mode-locked crystal waveguide laser by intracavity fourth-harmonic loss modulation (vol 48, pg 6064, 2024)" . | OPTICS LETTERS 49 . 7 (2024) : 1810-1810 . |
| APA | Li, Guotai , Han, Jiakun , Li, Shuai , Zhao, Jing , Zhu, Zhanda , Hui, Yongling et al. Nonlinear-mirror mode-locked crystal waveguide laser by intracavity fourth-harmonic loss modulation (vol 48, pg 6064, 2024) . | OPTICS LETTERS , 2024 , 49 (7) , 1810-1810 . |
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Abstract ：
本发明公开了一种基于热键合技术的铒镱共掺磷酸盐玻璃增益介质分层导热的结构，通过利用散热片与水冷系统，有效的解决了传统高功率侧面泵浦铒镱玻璃的热效应问题，通过热键合技术将增益介质与散热片键合在一起，降低了增益介质内部温度梯度，从而提高增益介质内的泵浦吸收功率密度，最终提高了输出功率。本发明具有体积小，结构紧凑，成本低等优点。易于实现一体化与小型化。
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| GB/T 7714 | 李强 , 吕游 , 雷訇 et al. 一种基于热键合技术的铒镱共掺磷酸盐玻璃增益介质分层导热的结构 : CN202310263066.9[P]. | 2023-03-17 . |
| MLA | 李强 et al. "一种基于热键合技术的铒镱共掺磷酸盐玻璃增益介质分层导热的结构" : CN202310263066.9. | 2023-03-17 . |
| APA | 李强 , 吕游 , 雷訇 , 韩雪 , 惠勇凌 , 朱占达 . 一种基于热键合技术的铒镱共掺磷酸盐玻璃增益介质分层导热的结构 : CN202310263066.9. | 2023-03-17 . |
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Abstract ：
一种镱双浓度掺杂钇铝石榴石的平面波导激光放大器属于固体激光放大器技术领域。本发明公开了一种可实现高功率、高效率的双掺杂Yb : YAG平面波导激光放大器，本发明芯层增益材料采用双掺杂浓度的Yb : YAG，降低波导入射端的芯层掺杂浓度减小热效应，增加后端增益介质掺杂浓度增加泵浦吸收，提高了增益介质的泵浦吸收均匀性，减小增益介质端面的温度梯度，改善热效应。制备方式采用键合技术，使得平面波导放大器整体结构更加简单紧凑，本发明的双掺杂Yb : YAG平面波导具有较大的功率体积比，易于实现小型化、大功率的工程应用。
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| GB/T 7714 | 雷訇 , 刘建港 , 李强 et al. 一种镱双浓度掺杂钇铝石榴石的平面波导激光放大器 : CN202310434150.2[P]. | 2023-04-21 . |
| MLA | 雷訇 et al. "一种镱双浓度掺杂钇铝石榴石的平面波导激光放大器" : CN202310434150.2. | 2023-04-21 . |
| APA | 雷訇 , 刘建港 , 李强 , 惠勇凌 , 朱占达 . 一种镱双浓度掺杂钇铝石榴石的平面波导激光放大器 : CN202310434150.2. | 2023-04-21 . |
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Abstract ：
High slope efficiency 3 mu m laser output exceeding Stokes limit is demonstrated in Er:YAG crystals with lower doping concentration at room temperature. Based on cyclic cascaded cavity, several parameters affecting slope efficiency are optimized. Under the optimized configuration, slope efficiencies up to 36.5% and 37.2%, exceeding the Stokes efficiency of 33%, are achieved in 10at.% and 25at.% Er:YAG crystals, respectively. The realization of high slope efficiency paves the way for improving the average power of 3 mu m lasers.
Keyword ：
Er Er Cyclic cascade Cyclic cascade YAG crystals YAG crystals Mid -infrared lasers Mid -infrared lasers
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| GB/T 7714 | Wang, Sibo , Tian, Ye , Qu, Bo et al. High slope efficiency 3?m Er:YAG cyclic cascade pulsed lasers [J]. | OPTICS AND LASER TECHNOLOGY , 2023 , 158 . |
| MLA | Wang, Sibo et al. "High slope efficiency 3?m Er:YAG cyclic cascade pulsed lasers" . | OPTICS AND LASER TECHNOLOGY 158 (2023) . |
| APA | Wang, Sibo , Tian, Ye , Qu, Bo , Zhu, Zhanda , Hui, Yongling , Lei, Hong et al. High slope efficiency 3?m Er:YAG cyclic cascade pulsed lasers . | OPTICS AND LASER TECHNOLOGY , 2023 , 158 . |
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Abstract ：
We present a dual-wavelength laser source obtained by spectral beam combining of two solid-state Nd:YAG pulsed lasers. The central wavelengths were locked at 1061.5 and 1064.6 nm. The output energy was the sum of the energy of the individually locked Nd:YAG lasers. The beam quality M2 of the combined beam is 2.8 x 2.2, which is nearly the same as that of a single Nd:YAG laser beam. This work should be helpful to provide an effective dual-wavelength laser source for applications. (c) 2023 Optica Publishing Group
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| GB/T 7714 | Zhu, Zhanda , Wu, Weichong , Wang, Luda et al. Dual-wavelength laser source by spectral beam combining of two Nd:YAG pulse lasers [J]. | APPLIED OPTICS , 2023 , 62 (8) : 1939-1942 . |
| MLA | Zhu, Zhanda et al. "Dual-wavelength laser source by spectral beam combining of two Nd:YAG pulse lasers" . | APPLIED OPTICS 62 . 8 (2023) : 1939-1942 . |
| APA | Zhu, Zhanda , Wu, Weichong , Wang, Luda , Hui, Yongling , Lei, Hong , Li, Qiang . Dual-wavelength laser source by spectral beam combining of two Nd:YAG pulse lasers . | APPLIED OPTICS , 2023 , 62 (8) , 1939-1942 . |
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Abstract ：
Cascaded mid-infrared (MIR) Er : YAG pulsed lasers at room temperature are reported. The characteristic wavelength of the cascaded emission is experimentally observed to be 1469 nm, and that of the excited-state absorption is determined as 1676 nm. Er: YAG crystals with doping concentrations (atomic number fractions) of 7.5% and 10% are adopted to compare the MIR output energy under the cascade and non-cascade conditions. For the Er: YAG with a doping concentration of 7. 5 , the maximum single pulse energy of MIR laser increases from 0.62 mJ (non-cascade) to 0. 99 mJ (cascade), increasing by about 59. 7%, and for Er : YAG with a doping concentration of 10%, that increases from 1. 04 mJ (non-cascade) to 1. 51 mJ (cascade), increasing by about 45.2%. The experimental results confirm the existence of cascade output at room temperature in low-doped Er: YAG crystals. The cascade is helpful to improve the single pulse energy of the mid-infrared laser.
Keyword ：
Er3+ laser Er3+ laser excited-state absorption excited-state absorption mid-infrared laser mid-infrared laser lasers lasers cascade cascade
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| GB/T 7714 | Wang Sibo , Tian Ye , Qu Bo et al. Experimental Exploration of Er: YAG Cascaded Pulsed Laser at Room Temperature [J]. | ACTA OPTICA SINICA , 2022 , 42 (9) . |
| MLA | Wang Sibo et al. "Experimental Exploration of Er: YAG Cascaded Pulsed Laser at Room Temperature" . | ACTA OPTICA SINICA 42 . 9 (2022) . |
| APA | Wang Sibo , Tian Ye , Qu Bo , Zhu Zhanda , Hui Yongling , Lei Hong et al. Experimental Exploration of Er: YAG Cascaded Pulsed Laser at Room Temperature . | ACTA OPTICA SINICA , 2022 , 42 (9) . |
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Abstract ：
Large core diameter crystal waveguides can absorb higher power pump light and achieve higher output power. At the same time, the peak power density in the core layer is relatively low during mode-locking operation, and the accumulation of nonlinear effects is reduced. Based on this, a passively mode-locked picosecond laser based on Yb: YAG large core diameter crystal square waveguide is constructed. In the experiment, firstly, the high mirror is used instead of the semiconductor saturable absorption mirror (SESAM), and the position and angle of the crystal waveguide are adjusted to match the pump light with the waveguide core layer under higher pump power. Then, the angle of the spherical mirror is carefully adjusted to couple the signal light into the waveguide core layer to minimize the loss in the cavity. The designed laser adopts a folded cavity structure, and achieves an average power of 10.2 W, pulse width of 65 ps, repetition rate of 30.15 MHz, and single pulse energy of 0.34 mu J without dispersion compensation device.
Keyword ：
crystal waveguide crystal waveguide lasers lasers semiconductor saturable absorption mirror semiconductor saturable absorption mirror mode locked laser mode locked laser solid-state laser solid-state laser
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| GB/T 7714 | Li Shuai , Li Guotai , Zhang Kailun et al. Semiconductor Saturable Absorption Mirror Mode-Locked Laser Based on Large Core Size Crystal Waveguide [J]. | ACTA OPTICA SINICA , 2022 , 42 (10) . |
| MLA | Li Shuai et al. "Semiconductor Saturable Absorption Mirror Mode-Locked Laser Based on Large Core Size Crystal Waveguide" . | ACTA OPTICA SINICA 42 . 10 (2022) . |
| APA | Li Shuai , Li Guotai , Zhang Kailun , Zhu Zhanda , Hui Yongling , Lei Hong et al. Semiconductor Saturable Absorption Mirror Mode-Locked Laser Based on Large Core Size Crystal Waveguide . | ACTA OPTICA SINICA , 2022 , 42 (10) . |
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Abstract ：
本发明提出一种基于大数据的居民点出行碳排放的核算方法，所述方法主要包括：利用出租车轨迹大数据测算出租车碳排放量；根据出租车轨迹的上、下车点及其步行范围内的POI，确定出租车轨迹的出行类型；将轨迹碳排放汇总至居民点，获得居民点的出行碳排放。本发明充分挖掘出租车大数据的各种时间、空间信息，从出租车轨迹大数据当中筛选出符合要求的通勤样本进行碳排放的计算；所获得的通勤样本的准确性、实时性、普适性均显著优于传统调研方法。
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| GB/T 7714 | 夏楚瑜 , 李淞 , 薛飞 et al. 一种基于大数据的居民点出行碳排放的核算方法 : CN202210651549.1[P]. | 2022-06-10 . |
| MLA | 夏楚瑜 et al. "一种基于大数据的居民点出行碳排放的核算方法" : CN202210651549.1. | 2022-06-10 . |
| APA | 夏楚瑜 , 李淞 , 薛飞 , 张健 , 李强 . 一种基于大数据的居民点出行碳排放的核算方法 : CN202210651549.1. | 2022-06-10 . |
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