Article
Multidisciplinary Sciences
Juntao Tian, Lili Zhao, Zhiyong Li, Jintian Bian, Qing Ye, Hai Wang, Rongqing Tan
Summary: This study presents a high efficiency Ho:YAG laser based on a narrow linewidth tunable 1.91 μm laser. A tunable Tm:YLF laser is used as the pump source, with a continuous tunable wavelength range from 1906.04 to 1908.83 nm and a linewidth of less than 0.41 nm. By changing the operating temperature of the VBG, the tunable Tm:YLF laser is achieved. The output power of the Ho:YAG laser ranges from 21.04 to 23.53 W, with a slope efficiency between 64.08 and 68.26% at a pump power of 39.8 W. The study shows that fine-tuning the pump wavelength is an effective way to improve the slope efficiency and output power of the Ho:YAG laser at room temperature.
SCIENTIFIC REPORTS
(2023)
Article
Optics
Gaoyou Liu, Shuyi Mi, Ke Yang, Disheng Wei, Junhui Li, Baoquan Yao, Chao Yang, Tongyu Dai, Xiaoming Duan, Lixin Tian, Youlun Ju
Summary: A high-power switched two-stage Ho:YAG MOPA system was demonstrated using Tm:YLF lasers. A new method was introduced to improve beam quality by rotating and swapping spatial axial directions of pump beams. High power output was achieved by employing two parallel second-stage Ho:YAG amplifiers. Additionally, a ZnGeP2 MOPA system was demonstrated using the Ho:YAG MOPA as the pump source, achieving high power output with good beam quality.
Article
Optics
Jimeng Gao, Qunlong Long, Qingwen Han, Lei Wang, Zhaopeng Xu, Yefei Mao
Summary: We demonstrated a compact and efficient Ho:YAG slab laser intra-cavity pumped by a Tm:YLF slab laser for the first time. The maximum power of 32.1 W with an optical-to-optical efficiency of 52.8% was obtained in the Tm:YLF laser operation. In the intra-cavity pumped Ho:YAG laser operation, an output power of 12.7 W at 2122 nm was obtained, with beam quality factors M2 of 1.22 and 1.11 in the vertical and horizontal directions, respectively. The RMS instability was measured to be lower than 0.1%. To the best of our knowledge, this was the maximum power for the Tm-doped laser intra-cavity pumped Ho-doped laser with near-diffraction-limited beam quality.
Article
Optics
Shang Wang, Zhenhua Cong, Junliang Liu, Xingyu Zhang, Zhigang Zhao, Zhaojun Liu
Summary: A high-efficiency ultrafast laser amplifier based on thin-rod Yb:YAG was demonstrated, achieving >50% efficiency and the highest average power operation. Additionally, pulse compression was conducted using a chirped volume Bragg grating.
Article
Engineering, Electrical & Electronic
Weiwei Huang, Chuanyong Ren, Fei Wang, Jun Wang, Deyuan Shen, Dingyuan Tang
Summary: We report on the high power and narrow linewidth laser operation of a home-developed high optical quality Tm:YAG ceramic. By directly pumping the Tm3+ ion to the upper energy level of the 2μm laser transition using a high power 1620 nm fiber Raman laser, the laser achieved high efficiency and narrow linewidth output.
IEEE PHOTONICS JOURNAL
(2022)
Article
Optics
Jacek Kwiatkowski, Jaroslaw Sotor
Summary: The translation presents a Ho:YAG laser's performance and characteristics, achieving dual-wavelength laser emission through adjustments of different parameters, while maintaining a high optical-to-optical conversion efficiency.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Yue Song, Zhi-Min Wang, Yong Bo, Feng-Feng Zhang, Yi-Xuan Zhang, Nan Zong, Qin-Jun Peng
Summary: In this study, a high-power continuous-wave ultraviolet laser at 378 nm was successfully demonstrated using an intracavity frequency-doubled Alexandrite laser and 638 nm fiber-coupled laser diodes as the pump source. The maximum output power reached 2.55 W, marking the highest power for CW frequency-doubled Alexandrite lasers to date. The optical-to-optical conversion efficiency from the 638 nm pump laser to 378 nm UV laser was measured to be 7.9%.
Article
Optics
Jinfang Yang, Zhaohua Wang, Jiajun Song, Xianzhi Wang, Renchong Lu, Jiangfeng Zhu, Zhiyi Wei
Summary: We report on a high-power diode-pumped Yb:KGW mode-locked laser with a semiconductor saturable absorber mirror (SESAM). The laser generates high average output power, narrow pulse width, high peak power, and exhibits good power stability.
CHINESE OPTICS LETTERS
(2022)
Article
Optics
Shuaihao Ji, Zhongyu Wang, Shuhua Huang, Chenyao Shen, Jiazhen Lin, Bo Xiao, Qichen Feng, Huiying Xu, Zhiping Cai
Summary: We present the first green fiber laser based on in-band pumping, addressing the impact of the pumping mechanism on output characteristics and introducing a new pumping strategy to improve visible fiber laser performance. We demonstrate the highest power output of 0.52 W using a single-wavelength 532 nm solid-state laser as the pump source, and achieve dual-wavelength excitation with a maximum power output of 0.72 W.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Wiktor Walasik, Robert Tench, Jean-Marc Delavaux, Eric Lallier
Summary: The design and performance of a 2 μm dual-stage polarization maintaining holmium-doped fiber amplifier (HDFA) operating in both continuous-wave (CW) and pulsed regime is reported. The amplifier, pumped at 1860 nm, achieved over 1W of output power at 2051 nm and 2090 nm signal wavelengths in CW mode, and delivered up to 200W of peak power and 10 μJ of pulse energy in pulsed mode with excellent stability.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Chuan-Peng Qian, Ting Yu, Jing Liu, Yu-Yao Jiang, Si-Jie Wang, Xiang-Chun Shi, Xi-Sheng Ye, Wei-Biao Chen
Summary: A narrow pulse-width long-wave infrared ZGP OPO pumped by a Ho:YAG MOPA was demonstrated, achieving a minimum pulse width of 12 ns and a maximum average output power of 73.1 W.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
Xiangrui Meng, Xugang Zhang, Xiaoming Chen, Xingwang Luo, Junzhi Ye, Lei Zhang, Qingsong Gao, Baole Lu
Summary: In this paper, a continuous-wave Nd:YAG InnoSlab laser at 1319 nm with high output power and high beam quality is demonstrated. The maximum output power of 170 W at 1319-nm single wavelength is obtained with an optical-to-optical efficiency of 15.3% and a corresponding slope efficiency of 26.7%. The beam quality factors of M2 are 1.54 and 1.78 in the horizontal and vertical directions, respectively. This is the first report on Nd:YAG 1319-nm InnoSlab lasers with such high output power and good beam quality.
Article
Optics
Hangbin Xie, Jianing Zhang, Fei Wang, Deyuan Shen, Jun Wang, Dingyuan Tang
Summary: We report on the high-power operation of an approximately 1.6 μm Er:Y2O3 ceramic laser using a low-scattering-loss, 0.25 at.% Er3+-doped ceramic sample fabricated in-house via a co-precipitation process. The laser is in-band pumped by an Er, Yb fiber laser at 1535.6 nm and generates 10.2 W of continuous-wave (CW) output power at 1640.4 nm with a slope efficiency of 25%. This is the first demonstration of an approximately 1.6 μm Er:Y2O3 laser at room temperature. The prospects for further scaling of the output power and lasing efficiency via low Er3+ doping and reduced energy-transfer upconversion are discussed.
Article
Optics
Xin Cheng, Zhiquan Lin, Xuezong Yang, Shuizhen Cui, Xin Zeng, Huawei Jiang, Yan Feng
Summary: This study investigates high-power continuous-wave single-frequency Er-doped fiber amplifiers at 1560 nm using in-band and core pumping of a 1480 nm Raman fiber laser. Both co- and counter-pumping configurations are experimentally studied. The co-pumped setup achieves output power up to 59.1 W and 90% efficiency in the fundamental mode and linear polarization, while the counter-pumped configuration yields less power and efficiency due to additional loss. The amplifier shows identical performance in terms of laser linewidth and relative intensity noise up to 10 MHz for both setups.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2023)
Article
Optics
Tarcio de Almeida Vieira, Felipe Maia Prado, Niklaus Ursus Wetter
Summary: This study demonstrates laser emission at the 1053 nm transition of Nd:YLF4 using diode-side-pumping at 863 nm. The laser configuration achieves the highest slope efficiency reported for the Nd:YLF4 medium, close to the quantum limit.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jingru Ji, Haotian Wang, Jie Ma, Jun Guo, Jianing Zhang, Dingyuan Tang, Deyuan Shen
Summary: In this study, we present a narrow linewidth SH fiber laser that utilizes two tapered fibers and a high-Q MgF2 crystalline whispering-gallery-mode resonator. By controlling the feedback from the drop port, stable single longitudinal mode (SLM) operation of multi-mode fiber lasers is achieved. The experimental results demonstrate a stable single-frequency fiber laser with ultra-low white frequency noise and instantaneous linewidth. This compact, controllable, and all-fiber configuration for ultra-narrow linewidth laser is of great significance in various applications.
Article
Optics
Hangbin Xie, Jianing Zhang, Fei Wang, Deyuan Shen, Jun Wang, Dingyuan Tang
Summary: We report on the high-power operation of an approximately 1.6 μm Er:Y2O3 ceramic laser using a low-scattering-loss, 0.25 at.% Er3+-doped ceramic sample fabricated in-house via a co-precipitation process. The laser is in-band pumped by an Er, Yb fiber laser at 1535.6 nm and generates 10.2 W of continuous-wave (CW) output power at 1640.4 nm with a slope efficiency of 25%. This is the first demonstration of an approximately 1.6 μm Er:Y2O3 laser at room temperature. The prospects for further scaling of the output power and lasing efficiency via low Er3+ doping and reduced energy-transfer upconversion are discussed.
Article
Engineering, Electrical & Electronic
Weiwei Huang, Chuanyong Ren, Fei Wang, Jun Wang, Deyuan Shen, Dingyuan Tang
Summary: We report on the high power and narrow linewidth laser operation of a home-developed high optical quality Tm:YAG ceramic. By directly pumping the Tm3+ ion to the upper energy level of the 2μm laser transition using a high power 1620 nm fiber Raman laser, the laser achieved high efficiency and narrow linewidth output.
IEEE PHOTONICS JOURNAL
(2022)
Article
Chemistry, Organic
Shi-Qiang Li, Wei Yan, Liu-Jun He, Ming Zhang, Dian-Yong Tang, Hong-yu Li, Zhong-Zhu Chen, Zhi-Gang Xu
Summary: A novel method for constructing naturally occurring spiroindolines with potential anti-cancer properties was developed, which can control the configuration of multiple chiral centers simultaneously.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Optics
Wang Fei, Ding Manman, Shen Deyuan, Wang Jun, Tang Dingyuan
Summary: 3 micron lasers with Er-doped gain media have wide applications and potential for high efficiency, with research focusing on optimizing doping concentration and material parameters for improved laser performance.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2022)
Article
Physics, Applied
Manman Ding, Xuanxi Li, Fei Wang, Deyuan Shen, Jun Wang, Dingyuan Tang, Heyuan Zhu
Summary: This study reports on the high-power and room temperature operation of an Er:Y2O3 ceramic laser based on home-developed high optical quality ceramic samples. By optimizing the pumping method and resonator design, a high slope efficiency was achieved.
APPLIED PHYSICS EXPRESS
(2022)
Article
Materials Science, Ceramics
Haohao Ji, Hetuo Chen, Buhao Zhang, Xiaojian Mao, Yu Liu, Jian Zhang, Shiwei Wang
Summary: In this study, transparent AlON ceramics were successfully fabricated using the direct ink writing method from water-based ceramic slurry. By optimizing the solids loading and adjusting the printability and water content, high optical and mechanical properties were achieved. The effects of sintering temperature and dwell time on the ceramics' properties were systematically studied.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Yexin Hu, Yanru Zhang, Xing Fu, Dianyong Tang, Hui Li, Ping Hu, Liangfang Zhu, Changwei Hu
Summary: The presence of NaCl in water inhibits the degradation of fructose and reduces the formation of unwanted byproducts, but promotes the formation of soluble humins.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Materials Science, Ceramics
Mengwei Liu, Jin Zhao, Shunzo Shimai, Dan Han, Jian Zhang, Shiwei Wang
Summary: In this study, transparent MgAl2O4 ceramics were successfully shaped by using polyacrylic acid (PAA) as a dispersant and gelling agent. Spinel slurries were prepared using ball-milling method, and the gelling occurred at room temperature without any other organic additive. A novel in situ characterization method was also developed to investigate the strengthening process of wet green body and guide the demolding.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Yuchen Bai, Hongyang Zhao, Xiaodong Xu, Jian Zhang, Shiwei Wang
Summary: This study focuses on the importance of Ho-doped sesquioxide as a laser gain medium for 2 micron wavelength band laser applications, along with the structural and spectral properties of the material. Transparent ceramics with high transmittance were successfully prepared using specific methods. The addition of ZrO2 did not significantly affect the spectroscopic properties of the ceramics.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Engineering, Manufacturing
Haohao Ji, Jin Zhao, Jie Chen, Shunzo Shimai, Jian Zhang, Yu Liu, Dianzi Liu, Shiwei Wang
Summary: Material extrusion enables the fabrication of multi-material and complex-shaped high-performance components. A novel experimental approach using rotational rheology test and capillary rheology test was proposed to evaluate the printability of inks. Criteria of storage modulus and extrusion stress were introduced to assess the success of printable inks. Capillary extrusion experiments provided insights into suppressing the appearance of bubbles.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Chemical
Huixing Yang, Wei Li, Yangyang Jiang, Qiuming Wei, Linlin Hou, Zhiliang Wu, Qinyu He, Yinzhen Wang, Dingyuan Tang
Summary: The proper design of photocatalysts is crucial for improving the performance of photocatalytic decomposition of water and degradation of pollutants. In this study, a composite material CdS-DETA@g-C3N5 was synthesized by combining nitrogen-rich carbon nitride with CdS-DETA, which exhibited significantly higher hydrogen evolution rate and OFLX degradation rate compared to other catalysts. The enhancements in performance were attributed to the enhancement of energy band bending, construction of a built-in electric field, and retention of high redox carriers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Manman Ding, Xuanxi Li, Fei Wang, Jun Wang, Deyuan Shen, Dingyuan Tang, Heyuan Zhu
Summary: This paper reports on the single-longitudinal-mode and tunable operation of an Er:Y2O3 ceramic laser at around 2.7 μm using intracavity Fabry-Perot etalons combined with a birefringent filter. The laser is pumped with a high brightness, narrow linewidth diode source at around 980 nm and achieves a linearly polarized output power of over 240 mW at 2717 nm for an absorbed pump power of 5.1 W. The demonstrated wavelength tuning range spans from 2708.6 nm to 2741.2 nm, with output powers of over 220 mW throughout the tuning range.
IEEE PHOTONICS JOURNAL
(2023)
Article
Optics
Xiao Hu, Jun Guo, Jun Wang, Jie Ma, Luming Zhao, Seongwoo Yoo, Dingyuan Tang
Summary: This work reports the formation of novel soliton molecules (SMs) in a fiber laser with near-zero group velocity dispersion (ZGVD), involving the binding of bright and dark solitons. These stable bound states are formed due to the incoherent cross-phase modulation of light, resembling multi-atom molecules in chemistry. The research findings offer insights into the dynamics of large SM complexes and may have potential applications in large-capacity transmission and all-optical information storage.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Yuyuan Jiang, Jian Zhou, Bowen Lou, Jing Liu, Yanhua Xu, Junqing Zhao, Lei Li, Dingyuan Tang, Deyuan Shen
Summary: Tapered fiber and D-shaped fiber are two widely investigated devices for evanescent-field interactions with external materials. In this study, the local nonlinearities of these fibers were thoroughly investigated. It was found that the local nonlinear effect in the tapered fiber becomes appreciable as it shrinks, while the D-shaped fiber itself has negligible local nonlinearity. However, after coating with black phosphorus quantum dots, the D-shaped fiber exhibits a larger modulation depth compared to any of the coated tapered fibers of different thicknesses/lengths. The study also provides a theoretical analysis on the origin of saturable absorption with evanescent-field-based structures.
