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学者姓名：李平雪
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Abstract ：
We demonstrate a high repetition rate, high average power narrow-linewidth fiber amplifier at 1.55 mu m eye-safe waveband by using a very-large-mode-area active fiber doping Er and Yb, having a 60-mu m-diameter core and a 600-mu m-diameter inner cladding. A maximum average power reaches 16 W at a 10 kHz repetition rate for 600 ns pulses in the stimulated Brillouin scattering (SBS) free operation, which calculates to a 1.6 mJ pulse energy and 2.7 kW peak power. In addition, the peak power rises to 4.9 kW with 148 ns pulses at the onset of SBS. The signal peak is located at 1,551.15 nm with a 36 dB signal-to-noise ratio (SNR). In order to eliminate the pulse steepening, the pulse shaping technology using a triangular-like wave with a slower rising edge is applied on the input pulses. The half-width of the frequency-intensity spectrum from high-average-power fiber amplifier is about 1.02 MHz, approaching the Fourier transform limit.
Keyword ：
fiber amplifier fiber amplifier narrow linewidth narrow linewidth high average power high average power pulse shaping pulse shaping very-large-mode-area active fiber very-large-mode-area active fiber
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| GB/T 7714 | Wang, Yunpeng , Li, Yang , Zhang, Dongming et al. Pulse shaping, high average power narrow linewidth Er, Yb co-doped fiber amplifier [J]. | FRONTIERS IN PHYSICS , 2023 , 11 . |
| MLA | Wang, Yunpeng et al. "Pulse shaping, high average power narrow linewidth Er, Yb co-doped fiber amplifier" . | FRONTIERS IN PHYSICS 11 (2023) . |
| APA | Wang, Yunpeng , Li, Yang , Zhang, Dongming , Xiong, Chen , Li, Pingxue . Pulse shaping, high average power narrow linewidth Er, Yb co-doped fiber amplifier . | FRONTIERS IN PHYSICS , 2023 , 11 . |
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Abstract ：
High-energy single-frequency pulsed light with low noise is generated from a master oscillator power amplifier (MOPA) system at 1.55 mu m eye-safe wavelength using an ultra large mode area Er-Yb gain fiber. At a pulse repetition rate of 2 kHz, the maximum pulse energy without stimulated Brillouin scattering (SBS) reaches 2.07 mJ with 375 ns pulse duration for a pump power of 56.4 W. The pulse energy fluctuation is approximately 0.72 % within 21.5 min. The signal noise ratio (SNR) from the single-frequency fiber amplifier, at the highest pulse energy, centered at 1551.1 nm, is approximately 30 dB. The spectral half width of the signal light is calculated to be 1.28 MHz, which is close to the transform limit.
Keyword ：
High-energy single-frequency laser High-energy single-frequency laser Stimulated Brillouin scattering Stimulated Brillouin scattering Very large mode area Very large mode area 1.55 mu m eye-safe wavelength 1.55 mu m eye-safe wavelength
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| GB/T 7714 | Li, Yang , Wang, Yunpeng , Zhang, Dongming et al. Single frequency pulsed Er,Yb co-doped fiber amplifier with 2 mJ of output energy [J]. | INFRARED PHYSICS & TECHNOLOGY , 2023 , 136 . |
| MLA | Li, Yang et al. "Single frequency pulsed Er,Yb co-doped fiber amplifier with 2 mJ of output energy" . | INFRARED PHYSICS & TECHNOLOGY 136 (2023) . |
| APA | Li, Yang , Wang, Yunpeng , Zhang, Dongming , Xiong, Chen , Li, Pingxue . Single frequency pulsed Er,Yb co-doped fiber amplifier with 2 mJ of output energy . | INFRARED PHYSICS & TECHNOLOGY , 2023 , 136 . |
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Abstract ：
Chirp-rate-tunable microwave waveforms (CTMWs) with dynamically tunable parameters are of basic interest to many practical applications. Recently, photonic generation of microwave signals has made their bandwidths wider and more convenient for optical fiber transmission. An all-optical method for generation of multiband CTMWs is proposed and demonstrated on all-fiber architecture, relying on dual temporal cavity solitons with agile repetition rate. In the experiment, the triangular optical chirp microwave waveforms with bandwidth above 0.45 GHz (ranging from 1.45 GHz to 1.9 GHz) are obtained, and the chirp rate reaches 0.9 GHz/ms. The reconfigurability is also demonstrated by adjusting the control signal. This all-optical approach provides a technical basis for compact, multi-band reconfigurable microwave photonics transmission and reception systems.
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| GB/T 7714 | Xiong, Wen-Hao , Yao, Chuan-Fei , Li, Ping-Xue et al. Photonic Generation of Chirp-Rate-Tunable Microwave Waveforms Using Temporal Cavity Solitons with Agile Repetition Rate [J]. | CHINESE PHYSICS LETTERS , 2023 , 40 (6) . |
| MLA | Xiong, Wen-Hao et al. "Photonic Generation of Chirp-Rate-Tunable Microwave Waveforms Using Temporal Cavity Solitons with Agile Repetition Rate" . | CHINESE PHYSICS LETTERS 40 . 6 (2023) . |
| APA | Xiong, Wen-Hao , Yao, Chuan-Fei , Li, Ping-Xue , Zhu, Fei-Yu , Lei, Ruo-Nan . Photonic Generation of Chirp-Rate-Tunable Microwave Waveforms Using Temporal Cavity Solitons with Agile Repetition Rate . | CHINESE PHYSICS LETTERS , 2023 , 40 (6) . |
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Abstract ：
Ultrashort pulse fiber lasers with tunable pulsewidth have a wide range of applications in telecommunication, micro-fabrication, and nonlinear bioimaging. In this paper, we reported the simulation of multi-range pulsewidth-tunable ultrashort pulse laser generation in a mode-locked Er3+ doped fiber laser based on Cd3As2 as a saturable absorber (SA) for the first time. By changing the modulation depth (MD) of Cd3As2 SA from 35% to 75% at the different net normal dispersion, the pulsewidth of the fiber laser is tuned from 4.07 to 48.9 ps. In our simulation, the maximum single tunable range (20.3-48.9 ps) can be obtained when we use a long normal dispersion fiber to increase the net normal dispersion of the cavity, and the minimum tunable range of 1.68-2.45 ps is also achieved by further simultaneously decreasing the cavity length and the net normal dispersion. This model of a mode-locked fiber laser controlled by the MD of Cd3As2 SA provides a simple, reliable, and low-cost solution for a variety of applications that require width-tunable pulses. (c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/5.0138435
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| GB/T 7714 | Yang, Linjing , Yao, Chuanfei , Wu, Yongjing et al. Theoretical study on multi-range pulsewidth tuning in a dissipative soliton laser mode-locked by a Dirac semimetal [J]. | AIP ADVANCES , 2023 , 13 (4) . |
| MLA | Yang, Linjing et al. "Theoretical study on multi-range pulsewidth tuning in a dissipative soliton laser mode-locked by a Dirac semimetal" . | AIP ADVANCES 13 . 4 (2023) . |
| APA | Yang, Linjing , Yao, Chuanfei , Wu, Yongjing , Wang, Xuan , Ren, Guochuan , Wang, Chao et al. Theoretical study on multi-range pulsewidth tuning in a dissipative soliton laser mode-locked by a Dirac semimetal . | AIP ADVANCES , 2023 , 13 (4) . |
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Abstract ：
In this paper, we report a new method to generate tunable high-repetition-rate temporal cavity solitons (TCSs) in a nonlinear fiber cavity, which is driven by dual Brillouin laser pulses. This method is more feasible than generating solitons via a continuous optical-driven nonlinear cavity because of the enhanced four-wave mixing process triggered by the high peak intensity Brillouin laser pulses. The generated TCSs lock to the beating signal arriving from dual Brillouin pulses, which allows the repetition rate of the solitons to be directly tuned all- optically. The TCSs can be continuously tuned over a repetition rate range of 140 similar to 242 GHz by controlling the external dual-wavelength spacing, and the pulse duration can be accordingly adjusted from 0.9 ps to 513 fs. Such TCSs with tunable high-repetition-rate can provide a practical solution for the low-noise controllable millimeter-wave and terahertz sources.
Keyword ：
Scattering Scattering Optical pumping Optical pumping Fiber nonlinear optics Fiber nonlinear optics Kerr frequency comb Kerr frequency comb Pump lasers Pump lasers Optical solitons Optical solitons tuning mode spacing tuning mode spacing temporal cavity solitons temporal cavity solitons Optical pulses Optical pulses Dual pulse Brillouin laser Dual pulse Brillouin laser Optical fibers Optical fibers
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| GB/T 7714 | Xiong, Wenhao , Yao, Chuanfei , Li, Pingxue et al. Temporal Cavity Solitons With Tunable High-Repetition-Rate Generation in a Brillouin Pulse Laser Cavity [J]. | IEEE PHOTONICS JOURNAL , 2022 , 14 (3) . |
| MLA | Xiong, Wenhao et al. "Temporal Cavity Solitons With Tunable High-Repetition-Rate Generation in a Brillouin Pulse Laser Cavity" . | IEEE PHOTONICS JOURNAL 14 . 3 (2022) . |
| APA | Xiong, Wenhao , Yao, Chuanfei , Li, Pingxue , Wang, Yixuan , Zhu, Feiyu . Temporal Cavity Solitons With Tunable High-Repetition-Rate Generation in a Brillouin Pulse Laser Cavity . | IEEE PHOTONICS JOURNAL , 2022 , 14 (3) . |
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Abstract ：
We report an all-fiberized chirped pulse amplification system without any bulk devices. The stretcher and compressor are chirped fiber Bragg gratings inscribed in a 6/125 mu m single-mode fiber and a 30/250 mu m large-mode-area fiber. The fabrication system of chirped fiber Bragg gratings was designed and built by ourselves. The width of the linear exposure spot was controlled according to the different fiber sizes to improve the fabrication quality, and the parameters of chirped fiber Bragg gratings were fine-tuned during the fabrication to achieve the overall system's spectral matching. Two fiber circulators with the same fiber sizes as the chirped fiber Bragg gratings were employed to auxiliarily achieve the pulse stretching and compression. The dispersion accumulations provided by the stretcher and compressor are 129.8 ps and 90.8 ps. The power amplifiers were composed of the two-stage 10/130 mu m fiber pre-amplifier and the 30/250 mu m fiber main amplifier. The proposed chirped pulse amplification system with no spatial light is the true sense of an all-fiberized chirped pulse amplification structure and shows the main trend in development of ultrashort pulse fiber lasers.
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| GB/T 7714 | Wang, Ming-Xiao , Li, Ping-Xue , Xu, Yang-Tao et al. An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor [J]. | CHINESE PHYSICS LETTERS , 2022 , 39 (2) . |
| MLA | Wang, Ming-Xiao et al. "An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor" . | CHINESE PHYSICS LETTERS 39 . 2 (2022) . |
| APA | Wang, Ming-Xiao , Li, Ping-Xue , Xu, Yang-Tao , Zhu, Yun-Chen , Li, Shun , Yao, Chuan-Fei . An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor . | CHINESE PHYSICS LETTERS , 2022 , 39 (2) . |
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Abstract ：
To obtain fiber devices with large stretched amount, we designed and fabricated two kinds of chirped fiber Bragg grating (CFBG) stretchers with the phase mask inscription technology. According to the theories of the phase mask inscription technology and dispersion compensation with CFBGs, the fabrication methods for the two stretchers were proposed and the optical paths were optimized to obtain CFBGs with high reflectivity and wide reflection bandwidth. The reflective resonance wavelength of CFBG was controlled by the tension sensor, and the inscription method was improved. A cascaded CFBG stretcher with large dispersion and a series CFBG stretcher with large reflection bandwidth were fabricated. Fiber sources were then built to test the two kinds of stretchers. The stretched amount provided by the cascaded CFBG stretcher was directly measured to be 345 ps, which was consistent with the theoretical result. The stretched amount provided by the series CFBG stretcher was indirectly calculated through direct and reverse connections. The calculated result, being about 278.7 ps, was smaller than the theoretical result.
Keyword ：
series fiber Bragg grating stretcher series fiber Bragg grating stretcher fiber optics fiber optics dispersion management of chirped fiber Bragg grating dispersion management of chirped fiber Bragg grating phase mask inscription technique phase mask inscription technique cascaded fiber Bragg grating stretcher cascaded fiber Bragg grating stretcher
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| GB/T 7714 | Wang Mingxiao , Li Pingxue , Xu Yangtao et al. Design and Fabrication of Chirped Fiber Bragg Grating Stretchers [J]. | ACTA OPTICA SINICA , 2022 , 42 (7) . |
| MLA | Wang Mingxiao et al. "Design and Fabrication of Chirped Fiber Bragg Grating Stretchers" . | ACTA OPTICA SINICA 42 . 7 (2022) . |
| APA | Wang Mingxiao , Li Pingxue , Xu Yangtao , Li Shun , Yao Chuanfei . Design and Fabrication of Chirped Fiber Bragg Grating Stretchers . | ACTA OPTICA SINICA , 2022 , 42 (7) . |
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Abstract ：
We report on a novel fiber chirped-pulse amplification system with a hundred-watt level average power. All-fiberized laser amplifiers, a chirped fiber Bragg grating stretcher, and a chirped volume Bragg grating compressor make up the system. The chirped fiber Bragg gratings were inscribed in the experiment through the fabrication system built by ourselves, with the parameters fine-tuned during fabrication to match the spectrum after stretching to the source waveband and the spectral width of the chirped volume Bragg grating compressor. A 12 m-long photonic crystal fiber was also used to provide effective spectral bandwidth matching between the preamplifier and the chirped fiber Bragg gratings. Meanwhile, the gain fiber length of the amplifiers was suitably selected, and the overall system's spectral matching was achieved. As a result, a compressed average power of 111.4 W was obtained with a pulse duration of 1.5 ps, resulting in peak power of 4.1 MW. The proposed all-fiberized stretcher and amplifier structure significantly decrease the system's volume, increase the system's stability and dependability, and may be used in various applications.
Keyword ：
Chirped volume Bragg grating Chirped volume Bragg grating Cascade chirped fiber Bragg gratings Cascade chirped fiber Bragg gratings Photonic crystal fiber Photonic crystal fiber Chirped pulse amplification system Chirped pulse amplification system
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| GB/T 7714 | Wang, Mingxiao , Li, Pingxue , Li, Shun et al. Hundred-watt level average power CPA system with all-fiberized laser amplifiers based on CFBG stretcher and CVBG compressor [J]. | OPTIK , 2022 , 253 . |
| MLA | Wang, Mingxiao et al. "Hundred-watt level average power CPA system with all-fiberized laser amplifiers based on CFBG stretcher and CVBG compressor" . | OPTIK 253 (2022) . |
| APA | Wang, Mingxiao , Li, Pingxue , Li, Shun , Xu, Yangtao , Yao, Chuanfei . Hundred-watt level average power CPA system with all-fiberized laser amplifiers based on CFBG stretcher and CVBG compressor . | OPTIK , 2022 , 253 . |
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Abstract ：
The influence of optical nonlinearity on combining efficiency in ultrashort pulse fiber laser coherent combining system is investigated theoretically and experimentally. In the theoretical work, a new theoretical algorithm is presented for the coherent combining efficiency, which can be used to quantify the spectral coherence decay induced by optical nonlinearity imbalance between the sub-beams. The spectral information of the sub-beam is obtained by numerically solving the nonlinear Schrodinger equation (NLSE) in this algorithm to ensure an accurate prediction. In the experimental work, the coherent combining of two all-fiber picosecond lasers is achieved, and the influence of imbalanced optical nonlinearity on the combining efficiency is studied, which agrees with the theoretical prediction. This paper reveals the physical mechanism for the influence of optical nonlinearity on the combining efficiency, which is valuable for the coherent combining of ultrashort pulse fiber laser beams.
Keyword ：
coherent beam combination coherent beam combination optical nonlinearity optical nonlinearity spectral coherence spectral coherence
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| GB/T 7714 | Zhu, Yun-Chen , Li, Ping-Xue , Yao, Chuan-Fei et al. Influence of optical nonlinearity on combining efficiency in ultrashort pulse fiber laser coherent combining system [J]. | CHINESE PHYSICS B , 2022 , 31 (6) . |
| MLA | Zhu, Yun-Chen et al. "Influence of optical nonlinearity on combining efficiency in ultrashort pulse fiber laser coherent combining system" . | CHINESE PHYSICS B 31 . 6 (2022) . |
| APA | Zhu, Yun-Chen , Li, Ping-Xue , Yao, Chuan-Fei , Li, Chun-Yong , Xiong, Wen-Hao , Li, Shun . Influence of optical nonlinearity on combining efficiency in ultrashort pulse fiber laser coherent combining system . | CHINESE PHYSICS B , 2022 , 31 (6) . |
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Abstract ：
We report on a compact, stable, all-fiberized narrow-linewidth (0.045 nm) pulsed laser source emitting laser beam with a wavelength of 266 nm, and tunable pulse width and repetition rate. The system is based on all-fiberized nanosecond amplifier architecture, which consists of Yb-doped fiber preamplifiers and a super-large-mode-area Yb-doped fiber power amplifier. The fiber amplifier with a core of 50 mu m is used to raise the threshold of the stimulated Brillouin scattering (SBS) effect and to obtain high output power and single pulse energy. Using lithium triborate (LBO) crystal and beta-barium borate (BBO) crystal for realizing the second-harmonic generation (SHG) and fourth-harmonic generation (FHG), we achieve 17 mu J (1.73 W) and 0.66 mu J (66 mW), respectively, at wavelengths of 532 nm and 266 nm and a repetition rate of 100 kHz with pulse width of 4 ns. This source has great potential applications in fluorescence research and solar-blind ultraviolet optical communication.
Keyword ：
narrow-linewidth narrow-linewidth all-fiber amplifier all-fiber amplifier ultraviolet beam generation ultraviolet beam generation nanosecond nanosecond tunable pulse width and repetition rate tunable pulse width and repetition rate
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| GB/T 7714 | Li, Shun , Li, Ping-Xue , Yang, Min et al. The 266-nm ultraviolet-beam generation of all-fiberized super-large-mode-area narrow-linewidth nanosecond amplifier with tunable pulse width and repetition rate [J]. | CHINESE PHYSICS B , 2022 , 31 (3) . |
| MLA | Li, Shun et al. "The 266-nm ultraviolet-beam generation of all-fiberized super-large-mode-area narrow-linewidth nanosecond amplifier with tunable pulse width and repetition rate" . | CHINESE PHYSICS B 31 . 3 (2022) . |
| APA | Li, Shun , Li, Ping-Xue , Yang, Min , Yu, Ke-Xin , Zhu, Yun-Chen , Dong, Xue-Yan et al. The 266-nm ultraviolet-beam generation of all-fiberized super-large-mode-area narrow-linewidth nanosecond amplifier with tunable pulse width and repetition rate . | CHINESE PHYSICS B , 2022 , 31 (3) . |
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