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学者姓名：宋晏蓉
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摘要 ：
We have demonstrated a high order harmonic mode-locked erbium-doped fiber laser by utilizing 2H-MoTe2 film as a saturable absorber (SA). The SA is synthesized by depositing 2H-MoTe2 film on a D-shaped fiber. The nonlinear optical properties of the 2H-MoTe2 SA are characterized, showing a modulation depth of 14.7% and a saturation intensity of 3 GW cm(-2). Through optimizing the pump power and intra-cavity polarization state, a 171st-order harmonic soliton at 0.9 GHz repetition frequency with a pulse width of 1.06 ps was obtained. The fundamentally mode-locked pulse train had a pulse width of 1.03 ps and a repetition rate of 5.33 MHz. To the best of our knowledge, the 171st-order harmonic soliton is the highest operating repetition frequency that has ever been demonstrated in a 2H-MoTe2 SA mode locked fiber laser. The results indicate the potential of 2H-MoTe2 SA at high repetition rates regimes, which could benefit for future possible application.
关键词 ：
mode-locked fiber laser mode-locked fiber laser 2H-MoTe2 2H-MoTe2 harmonic mode-locking harmonic mode-locking
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| GB/T 7714 | Liu, Hai-Yan , Zhang, Ze-Xin , Xv, Lu-Feng et al. 171st-order harmonic soliton erbium-doped fiber laser based on 2H-MoTe2 saturable absorber [J]. | LASER PHYSICS LETTERS , 2024 , 21 (6) . |
| MLA | Liu, Hai-Yan et al. "171st-order harmonic soliton erbium-doped fiber laser based on 2H-MoTe2 saturable absorber" . | LASER PHYSICS LETTERS 21 . 6 (2024) . |
| APA | Liu, Hai-Yan , Zhang, Ze-Xin , Xv, Lu-Feng , Tian, Jin-Rong , Song, Yan-Rong . 171st-order harmonic soliton erbium-doped fiber laser based on 2H-MoTe2 saturable absorber . | LASER PHYSICS LETTERS , 2024 , 21 (6) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Understanding the mechanism of mode-locking in a laser with high-order transverse mode is important for achieving an ultrashort pulses train under more complicated conditions. So far, mode-locking with high-order transverse mode has not been reported in other lasers except the multimode fiber laser. This paper demonstrates robust mode-locking with high-order transverse mode in a Kerr-lens mode-locked vertical-external-cavity surface-emitting laser for the first time, to the best of our knowledge. While the longitudinal modes are locked, continuous mode-locking accompanied by high-order transverse mode up to TEM40 is observed. The threshold of the mode-locking is only a little bigger than that of the lasing. After the laser oscillation is built up, the mode-locked pulse train can be obtained almost immediately and maintained until the thermal rollover of the laser. Output powers of 717 mW under fundamental mode and 666 mW under high-order transverse mode are achieved with a 4.3 ps pulse duration and 1.1 GHz pulses repetition rate, and some phenomenological explanations to the related characteristics of the mode-locked operation of high-order transverse mode in the vertical-external-cavity surface-emitting laser are proposed.
关键词 ：
mode-locking mode-locking high-order transverse mode high-order transverse mode vertical-external-cavity surface-emitting laser vertical-external-cavity surface-emitting laser
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| GB/T 7714 | Wang, Tao , Liu, Yunjie , Zhu, Renjiang et al. Mode-Locked Operation of High-Order Transverse Modes in a Vertical-External-Cavity Surface-Emitting Laser [J]. | SENSORS , 2024 , 24 (9) . |
| MLA | Wang, Tao et al. "Mode-Locked Operation of High-Order Transverse Modes in a Vertical-External-Cavity Surface-Emitting Laser" . | SENSORS 24 . 9 (2024) . |
| APA | Wang, Tao , Liu, Yunjie , Zhu, Renjiang , Jiang, Lidan , Lu, Huanyu , Song, Yanrong et al. Mode-Locked Operation of High-Order Transverse Modes in a Vertical-External-Cavity Surface-Emitting Laser . | SENSORS , 2024 , 24 (9) . |
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摘要 ：
Realtime spectroscopy access to ultrafast fiber lasers provides new opportunities for exploring complex soliton interaction dynamics. In this study, we employ a time -stretch technique that enables real-time access to both spectral and temporal dynamics, revealing rich nonlinear processes in asynchronous dual wavelength mode -locked pulses in an ultrafast fiber laser. Due to the different group velocities of the two wavelengths, the mode -locked solitons centered at different wavelengths periodically collide with each other. We recorded the entire process of soliton establishment, stabilization, and disappearance, shedding light on the mystery of stable transmission of dual -wavelength mode -locked pulses. These processes were observed for the first time in an ultrafast fiber laser, and the experimental evidence provides important insights into the understanding of nonlinear dynamics in fiber lasers, as well as the potential for improving laser performance for application in dual -comb spectroscopy. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Liu, Haiyan , Xu, Lufeng , Zhang, Zexin et al. Internal motion within ultrafast asynchronous dual wavelength mode-locked lasers [J]. | OPTICS EXPRESS , 2024 , 32 (4) : 6791-6799 . |
| MLA | Liu, Haiyan et al. "Internal motion within ultrafast asynchronous dual wavelength mode-locked lasers" . | OPTICS EXPRESS 32 . 4 (2024) : 6791-6799 . |
| APA | Liu, Haiyan , Xu, Lufeng , Zhang, Zexin , Song, Yanrong , Tian, Jinrong . Internal motion within ultrafast asynchronous dual wavelength mode-locked lasers . | OPTICS EXPRESS , 2024 , 32 (4) , 6791-6799 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
We demonstrated a repetition-rate-tunable self-mode-locked optically pumped semiconductor disk laser (OP-SDL). The highest repetition rate of mode-locked pulses was 6.13 GHz. When using an output mirror with a radius of curvature of 300 mm, the tuning range was from 0.6 GHz to 4.35 GHz. When replaced by an output mirror with a radius of curvature of 50 mm, the tuning range was from 3.13 GHz to 6.13 GHz. The entire tuning process was continuous, and OP-SDL was always in a stable mode-locked working state. To the best of our knowledge, this is the first work to obtain repetition rate of 6.13 GHz and tunable laser in self-mode-locked OP-SDLs. 3.75 GHz was the maximum tuning range of repetition rate at present.
关键词 ：
OP-SDL OP-SDL repetition rate tunable repetition rate tunable Self-mode-locking Self-mode-locking
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| GB/T 7714 | Zhuang, Bihui , Hua, Lingling , Tian, Jinrong et al. 6 GHz Repetition Rate and Tunable Self-Mode-Locked Semiconductor Disk Laser [J]. | IEEE PHOTONICS TECHNOLOGY LETTERS , 2023 , 35 (24) : 1351-1354 . |
| MLA | Zhuang, Bihui et al. "6 GHz Repetition Rate and Tunable Self-Mode-Locked Semiconductor Disk Laser" . | IEEE PHOTONICS TECHNOLOGY LETTERS 35 . 24 (2023) : 1351-1354 . |
| APA | Zhuang, Bihui , Hua, Lingling , Tian, Jinrong , Mao, Lin , Kan, Qiang , Zhao, Lingjuan et al. 6 GHz Repetition Rate and Tunable Self-Mode-Locked Semiconductor Disk Laser . | IEEE PHOTONICS TECHNOLOGY LETTERS , 2023 , 35 (24) , 1351-1354 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
一种提高材料类可饱和吸收体锁模光纤激光器输出稳定性的方法，属于激光技术领域。将材料作为可饱和吸收体应用到锁模光纤激光器中，在不低于20mW泵浦功率下，激光器输出的锁模脉冲处于不稳定状态时，此时利用外部光源对材料可饱和吸收器件进行持续照射，激光器输出锁模脉冲由不稳定状态变为稳定状态。本发明方法简单，且精确可靠。
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| GB/T 7714 | 宋晏蓉 , 许鲁风 , 董自凯 et al. 一种提高材料类可饱和吸收体锁模光纤激光器输出稳定性的方法 : CN202211204757.3[P]. | 2022-09-28 . |
| MLA | 宋晏蓉 et al. "一种提高材料类可饱和吸收体锁模光纤激光器输出稳定性的方法" : CN202211204757.3. | 2022-09-28 . |
| APA | 宋晏蓉 , 许鲁风 , 董自凯 , 田金荣 , 张璐璐 . 一种提高材料类可饱和吸收体锁模光纤激光器输出稳定性的方法 : CN202211204757.3. | 2022-09-28 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Q-switching in a mode-locked laser not only makes the amplitude of every single output pulse unequal, but also limits the time width and peak power of output pulses. This paper investigates the Q-switching in a self-mode-locked semiconductor disk laser numerically and experimentally. By using the delay differential equations for passively mode-locking, conditions of Q-switching in a self-mode-locked semiconductor disk laser are numerically analyzed for the first time. Meanwhile, based on the experimental results, the causes of Q-switching tendency including the change of nonlinear refractive index and the change of soft aperture, are also discussed. Some possible measures to suppress Q-switching instability, i.e., to obtain stable continuous-wave mode-locking in a self-mode-locked semiconductor disk laser are proposed.
关键词 ：
delay differential equations delay differential equations self-mode-locking self-mode-locking Laser excitation Laser excitation semiconductor disk laser semiconductor disk laser Laser mode locking Laser mode locking Semiconductor lasers Semiconductor lasers Q-switching Q-switching Apertures Apertures Delays Delays Refractive index Refractive index Mathematical models Mathematical models
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| GB/T 7714 | Zhang, Peng , Zhu, Renjiang , Wang, Tao et al. Dynamics Simulation and Experimental Investigation of Q-Switching in a Self-Mode-Locked Semiconductor Disk Laser [J]. | IEEE PHOTONICS JOURNAL , 2022 , 14 (5) . |
| MLA | Zhang, Peng et al. "Dynamics Simulation and Experimental Investigation of Q-Switching in a Self-Mode-Locked Semiconductor Disk Laser" . | IEEE PHOTONICS JOURNAL 14 . 5 (2022) . |
| APA | Zhang, Peng , Zhu, Renjiang , Wang, Tao , Wu, Yadong , Tong, Cunzhu , Wang, Lijie et al. Dynamics Simulation and Experimental Investigation of Q-Switching in a Self-Mode-Locked Semiconductor Disk Laser . | IEEE PHOTONICS JOURNAL , 2022 , 14 (5) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The dispersive Fourier transform technique provides feasibility of exploring non-repetitive events and the buildup process in ultrafast lasers. In this paper, we report a new buildup process of dissipative solitons in a simplified mode-locked Yb-doped fiber laser, which includes more complex physics stages such as the Q- switching stage, raised and damped relaxation oscillation stages, noise-like stage, successive soliton explosions stage, and soliton breathing stage. Complete evolution dynamics of noise-like pulse and double pulse are also investigated with dispersive Fourier transform. For the noise-like pulse dynamics process, it will only experience the Q- switching and relaxation oscillation stages. In the case of dissipative soliton and noise-like pulse, the double pulse buildup behavior is manifested as the replication of individual pulses. A weak energy migration occurs between two pulses before reaching steady state. Meanwhile, real-time mutual conversion of the dissipative soliton and noise-like pulse has been experimentally observed, which appears to be instantaneous without extra physical processes. To the best of our knowledge, this is the first report on these physical phenomena observed together in a mode-locked fiber laser. The results further enrich the dynamics of mode-locked fiber lasers and provide potential conditions for obtaining intelligent mode-locked lasers with controllable output.
关键词 ：
noise-like pulse noise-like pulse double-pulse double-pulse dispersive Fourier transform dispersive Fourier transform dissipative soliton dissipative soliton dynamics process dynamics process simplified mode-locked fiber lasers simplified mode-locked fiber lasers
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| GB/T 7714 | Zhang, Zexin , Tian, Jinrong , Cui, Youshuo et al. Dynamics of multi-state in a simplified mode-locked Yb-doped fiber laser [J]. | CHINESE OPTICS LETTERS , 2022 , 20 (8) . |
| MLA | Zhang, Zexin et al. "Dynamics of multi-state in a simplified mode-locked Yb-doped fiber laser" . | CHINESE OPTICS LETTERS 20 . 8 (2022) . |
| APA | Zhang, Zexin , Tian, Jinrong , Cui, Youshuo , Wu, Yunfeng , Song, Yanrong . Dynamics of multi-state in a simplified mode-locked Yb-doped fiber laser . | CHINESE OPTICS LETTERS , 2022 , 20 (8) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The evolutions of conventional soliton (CS) and breathing soliton (BS) dynamics in an anomalous dispersion Er-doped fiber laser are investigated experimentally and numerically. Based on the dispersive Fourier transform technique, the evolution processes of CS buildup and extinction are observed and discussed. It was found that a transitional unstable stage exists during the buildup and extinction process. In the same laser, BS state is also reached. Simulation results of CS and BS evolutionary dynamics are anastomotic with experimental results. The results may contribute to better understanding of the complex pulse dynamics in ultrafast fiber lasers.
关键词 ：
pulse propagation and temporal solitons pulse propagation and temporal solitons ultrafast phenomena ultrafast phenomena mode-locked fiber laser mode-locked fiber laser
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| GB/T 7714 | Cui, You-Shuo , Dong, Zi-Kai , Zhang, Lu-Lu et al. Spatio-temporal dynamics of conventional soliton and breathing soliton in an anomalous dispersion fiber laser [J]. | LASER PHYSICS LETTERS , 2021 , 18 (8) . |
| MLA | Cui, You-Shuo et al. "Spatio-temporal dynamics of conventional soliton and breathing soliton in an anomalous dispersion fiber laser" . | LASER PHYSICS LETTERS 18 . 8 (2021) . |
| APA | Cui, You-Shuo , Dong, Zi-Kai , Zhang, Lu-Lu , Tian, Jin-Rong , Song, Yan-Rong . Spatio-temporal dynamics of conventional soliton and breathing soliton in an anomalous dispersion fiber laser . | LASER PHYSICS LETTERS , 2021 , 18 (8) . |
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摘要 ：
Vertical external cavity surface-emitting lasers (VECSELs) have unique properties such as excellent beam quality, high average output power, and high repetition rate. Short pulses from VECSELs, especially picosecond and femtosecond, can be achieved by a passive mode-locking mechanism with a semiconductor saturable absorber mirror (SESAM). We theoretically simulate the pulse evolution dynamics in VECSELs and investigate the influences of different parameters of gain and SESAM on pulse characteristics. To the best of our knowledge, this is the first time that the influences of fast recovery time and two-photon absorption coefficient on pulse characteristics have been studied. (C) 2021 Optical Society of America
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| GB/T 7714 | Zhang, Yiwei , Hua, Lingling , Zhuang, Bihui et al. Simulation of the influence of gain and SESAM on characteristics of mode-locked VECSELs [J]. | APPLIED OPTICS , 2021 , 60 (9) : 2537-2542 . |
| MLA | Zhang, Yiwei et al. "Simulation of the influence of gain and SESAM on characteristics of mode-locked VECSELs" . | APPLIED OPTICS 60 . 9 (2021) : 2537-2542 . |
| APA | Zhang, Yiwei , Hua, Lingling , Zhuang, Bihui , Tian, Jinrong , Song, Yanrong . Simulation of the influence of gain and SESAM on characteristics of mode-locked VECSELs . | APPLIED OPTICS , 2021 , 60 (9) , 2537-2542 . |
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摘要 ：
本文基于非线性光环形镜锁模的掺铒光纤激光器,通过调节偏振控制器,实现了输出锁模脉冲类型可调.本文给出了三种调谐状态:传统孤子锁模脉冲输出,脉冲宽度1.16 ps;双峰结构光谱的脉冲输出,双峰位于1 555 nm和1 575 nm两个波段附近,且通过调节偏振控制器的偏振角度,在光谱中心波长附近可微调;实现了类噪声锁模脉冲输出,当泵浦功率400 mW时,类噪声脉冲重复频率为3.73 MHz,脉冲能量3.47 nJ,脉冲的基底宽度为129 ps,脉冲尖端宽度为0.86 ps.对不同应用领域给出了灵活的选择途径.
关键词 ：
双折射滤波 双折射滤波 ''8''字形腔 ''8''字形腔 孤子锁模 孤子锁模 类噪声 类噪声 非线性光环形镜 非线性光环形镜
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| GB/T 7714 | 梁金华 , 宋晏蓉 , 田金荣 et al. 脉冲类型可调的锁模光纤激光器 [J]. | 量子光学学报 , 2020 , 26 (2) : 210-216 . |
| MLA | 梁金华 et al. "脉冲类型可调的锁模光纤激光器" . | 量子光学学报 26 . 2 (2020) : 210-216 . |
| APA | 梁金华 , 宋晏蓉 , 田金荣 , 郑煜 . 脉冲类型可调的锁模光纤激光器 . | 量子光学学报 , 2020 , 26 (2) , 210-216 . |
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