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学者姓名：李平雪
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Abstract ：
An all-fiber high-power short-wavelength Tm-doped fiber (TDF) master oscillator power amplifier (MOPA) at 1907nm is presented. The master oscillator is a linear cavity structure that provides a 34.6 W signal light power to the amplifier. In the power amplifier, a method of combining angle-cleaved fusion splicing and gain fiber length cutting has been proved the feasibility for suppressing the parasitic oscillation and improving the output power of the 1907nm laser. By shortening the amplifier gain fiber length to 4 m and fusing the gain fiber at a 5 degrees angle, a maximum output power of 753.1 W at 1907nm with high spectral purity is obtained with a corresponding slope efficiency of 57.7% and optical to optical conversion efficiency of 51.3%. The spatial quality factor and power stability of the TDF MOPA system are 1.60 and 0.1% @ 20 min, respectively. This angle-cleaved fusion splicing method has the potential for mitigating parasitic oscillation in the 1907nm high-power Tm-doped all-fiber MOPA system. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Yan, Weinan , Wang, Yunpeng , Zhang, Dongming et al. High-power short-wavelength Tm-doped fiber amplifier at 1907nm with angle-cleaved fusion splicing [J]. | OPTICS EXPRESS , 2025 , 33 (16) : 34949-34959 . |
| MLA | Yan, Weinan et al. "High-power short-wavelength Tm-doped fiber amplifier at 1907nm with angle-cleaved fusion splicing" . | OPTICS EXPRESS 33 . 16 (2025) : 34949-34959 . |
| APA | Yan, Weinan , Wang, Yunpeng , Zhang, Dongming , Cai, Xinyu , Zhou, Wentao , Li, Yang et al. High-power short-wavelength Tm-doped fiber amplifier at 1907nm with angle-cleaved fusion splicing . | OPTICS EXPRESS , 2025 , 33 (16) , 34949-34959 . |
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Abstract ：
We have demonstrated a high peak power and high beam quality infrared femtosecond laser based on an all-fiber chirped pulse amplification (CPA) system. The Yb-doped fiber preamplifier uses a short, large-mode-area silica photonic crystal fiber (PCF) pumped by a fiber combiner, which reduces the limitations caused by the accumulation of a nonlinear phase. The main power amplifier is based on a rod-type Yb-doped PCF. It delivers an average power of 148 W at a repetition rate of 100 kHz. The laser pulses are compressed using a compact bulk transmission grating compressor. By minimizing the accumulation of nonlinear effects and optimizing dispersion compensation in the CPA system, a short pulse duration of 240 fs, an average power of 134 W, and a pulse energy of 1.34 mJ are achieved. The laser pulses exhibit excellent beam quality and high-power stability. The M2 value is less than 1.1, and the RMS of the power stability is below 0.7% over 8 hours. The outstanding performance of this system has broad applications in industrial and scientific research fields. (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 | Su, Meng , Meng, Xianghao , Jiao, Tianmeng et al. 134 W, 1.34 mJ, 240 fs ultrashort pulses from a rod-type photonic crystal fiber amplifier [J]. | OPTICS LETTERS , 2025 , 50 (14) : 4538-4541 . |
| MLA | Su, Meng et al. "134 W, 1.34 mJ, 240 fs ultrashort pulses from a rod-type photonic crystal fiber amplifier" . | OPTICS LETTERS 50 . 14 (2025) : 4538-4541 . |
| APA | Su, Meng , Meng, Xianghao , Jiao, Tianmeng , Zhao, Xianglong , Feng, Suya , Tai, Boyin et al. 134 W, 1.34 mJ, 240 fs ultrashort pulses from a rod-type photonic crystal fiber amplifier . | OPTICS LETTERS , 2025 , 50 (14) , 4538-4541 . |
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Abstract ：
We report a novel, to the best of our knowledge, inno-zigzag slab laser amplifier that innovatively combines features of innoslab and zigzag slab amplifiers. Operating at 1 kHz repetition rate, this architecture amplifies 300 ps pulses from 0.4mJ to 57.5mJ with a gain factor of 143.8. The seed laser undergoes eight-pass amplification through multiple total-reflection folded paths and inclined propagation within the gain medium, achieved by injecting at varied incident angles. The zigzag beam folding simultaneously increases the total gain path length and enables repeated energy extraction in total reflection regions. This configuration effectively homogenizes the temperature gradient along the thickness direction, mitigating wavefront distortion while enhancing beam quality in the thickness dimension. The beam quality of the output laser is M-x(2) = 1.19, M-y(2) = 1.42. To the best of our knowledge, this is the only report of the first use of a novel inno-zigzag slab structure that provides 140 times gain to output a high-energy picosecond pulsed laser. (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 | Yang, Guangdao , Meng, Xianghao , Bi, Yang et al. Hybrid inno-zigzag slab amplifier delivers 140x gain for 1 kHz high-energy picosecond pulses [J]. | OPTICS LETTERS , 2025 , 50 (17) : 5430-5433 . |
| MLA | Yang, Guangdao et al. "Hybrid inno-zigzag slab amplifier delivers 140x gain for 1 kHz high-energy picosecond pulses" . | OPTICS LETTERS 50 . 17 (2025) : 5430-5433 . |
| APA | Yang, Guangdao , Meng, Xianghao , Bi, Yang , Mao, Dun , Zhao, Xianglong , Gong, Zhaoqing et al. Hybrid inno-zigzag slab amplifier delivers 140x gain for 1 kHz high-energy picosecond pulses . | OPTICS LETTERS , 2025 , 50 (17) , 5430-5433 . |
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Ultra-broadband supercontinuum (SC) lasers covering the mid-infrared (MIR) region have significant applications in trace substance detection, national defense, and biomedical fields. Currently, high-power SC spanning 2-5 mu m is still dominated by traditional fluoride (InF3) fibers. Although tellurite fibers, with their excellent chemical and thermal stability, have demonstrated significantly higher power scalability compared to other MIR fibers, their spectral broadening capabilities in the 4-5 mu m region remain largely unexplored. Here, we demonstrate a> 10 W ultra-broadband flat SC spanning the 1.8-5.1 mu m spectral range in a fluorotellurite fiber using a cascaded soliton self-frequency shifting technique. The fluorotellurite fiber is precisely tapered to reconstruct dispersion and nonlinearity, which facilitates the evolution of the pre-stage Raman soliton into higherorder solitons, thereby enabling a new round of "rapid relay fission." At a low pump power of 7.5 W, we also achieved a high-power (0.5 W) Raman soliton (60 fs) at 4.3 mu m. These results, for the first time, to our knowledge, demonstrate that tapered fluorotellurite fibers can be used for high-power femtosecond pulse generation beyond 4 mu m and high-power SC generation beyond 5 mu m, establishing them as an exceptional nonlinear medium for the development of high-power MIR fiber lasers in the 4-5 mu m spectral region. (c) 2025 Chinese Laser Press
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| GB/T 7714 | Yang, Linjing , Yao, Chuanfei , Wang, Xuan et al. Precisely tapered fluorotellurite fiber-enabled Raman soliton relay fission for generating a 4-5 μm mid-infrared high-power laser [J]. | PHOTONICS RESEARCH , 2025 , 13 (8) : 2281-2290 . |
| MLA | Yang, Linjing et al. "Precisely tapered fluorotellurite fiber-enabled Raman soliton relay fission for generating a 4-5 μm mid-infrared high-power laser" . | PHOTONICS RESEARCH 13 . 8 (2025) : 2281-2290 . |
| APA | Yang, Linjing , Yao, Chuanfei , Wang, Xuan , Liu, Yamin , Li, Kaihang , Pu, Luyao et al. Precisely tapered fluorotellurite fiber-enabled Raman soliton relay fission for generating a 4-5 μm mid-infrared high-power laser . | PHOTONICS RESEARCH , 2025 , 13 (8) , 2281-2290 . |
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Abstract ：
Hollow-core antiresonant fibers (HC-ARFs) have surpassed the minimum transmission loss of traditional silica single-mode fibers. However, this breakthrough comes at the cost of heightened structural complexity, elevated fabrication challenges. Further loss reduction demands innovative structural strategies. In this work, we propose azimuthal-confinement-enhanced HC-ARFs by integrating curved boundaries and radial walls to amplify both boundary curvature effect (BCE) and azimuthal confinement effect (ACE). Three models-optimized radial spokes, single antiresonant silica layer, and grapefruit-shaped structures-are designed and categorized into ideal (no silica jacket layer) and practical (with silica jacket layer) types. Numerical simulations reveal that optimizing dimensionless parameters f theta and fr, corresponding to BCE and ACE respectively, achieves a 3-4 order-of-magnitude reduction in confinement loss (CL) for ideal-type fibers (minimum CL: 2.57 x 10-6 dB/m) and a 16-fold reduction for practical-type fibers compared to conventional designs. Critical tolerances for wavelength, silica wall thickness, and core radius are identified, ensuring robust low-loss operation. Additionally, the optimized structures exhibit enhanced minimum higher-order mode extinction ratio while maintaining bending loss and material absorption loss comparable to traditional HC-ARFs. This work establishes a paradigm for low-structural-complexity, high-performance low-loss HC-ARFs beyond nested-tube architectures, advancing their applicability across near-infrared to terahertz regimes. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Zhu, Yunhao , Liu, Shu , Wang, Xiaoyang et al. Design of azimuthal-confinement-enhanced hollow-core antiresonant fibers [J]. | OPTICS EXPRESS , 2025 , 33 (15) : 32347-32360 . |
| MLA | Zhu, Yunhao et al. "Design of azimuthal-confinement-enhanced hollow-core antiresonant fibers" . | OPTICS EXPRESS 33 . 15 (2025) : 32347-32360 . |
| APA | Zhu, Yunhao , Liu, Shu , Wang, Xiaoyang , Tian, Limin , Ma, Ying , Yao, Chuanfei et al. Design of azimuthal-confinement-enhanced hollow-core antiresonant fibers . | OPTICS EXPRESS , 2025 , 33 (15) , 32347-32360 . |
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Abstract ：
We demonstrate theoretically the enhanced mid-infrared dispersive waves (MIR-DWs) generation in erbium-doped fluoride fibers with two zero-dispersion wavelengths (ZDWs). This model includes Raman soliton generation, soliton self-frequency shift (SSFS), soliton gain, and DW generation. Making full use of the gain bandwidth of Er3+ and the SSFS effect to amplify soliton energy and then radiate enhanced MIR-DW. We compare results obtained in different gain fluoride fibers, DW energy is increased by up to 45 times, and the soliton-DW conversion efficiency is increased from 51.3% to 94% by applying a 10 dB/m peak gain in a 3.5 mu m core diameter fluoride fiber. Further, we design different dispersion curves by changing the core diameter and obtaining different wavelength DWs ranging from 3.3 to 4.4 mu m. Our results highlight the potential of the new technology in efficiently obtaining arbitrary wavelength MIR ultrashort pulse lasers, breaking through the limitation of rare rare-earth ion gain region. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Ren, Guochuan , Yao, Chuanfei , Wang, Xuan et al. Numerical demonstration of enhanced mid-infrared dispersive wave generation [J]. | OPTICS EXPRESS , 2025 , 33 (17) : 37075-37083 . |
| MLA | Ren, Guochuan et al. "Numerical demonstration of enhanced mid-infrared dispersive wave generation" . | OPTICS EXPRESS 33 . 17 (2025) : 37075-37083 . |
| APA | Ren, Guochuan , Yao, Chuanfei , Wang, Xuan , Yang, Linjing , Pu, Luyao , Li, Kaihang et al. Numerical demonstration of enhanced mid-infrared dispersive wave generation . | OPTICS EXPRESS , 2025 , 33 (17) , 37075-37083 . |
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Abstract ：
In this paper, a 2 mu m intra-cavity core-pumped Ho-doped fiber laser with high efficiency by using a tandem in-band pump approach based on an all-polarization-maintaining structure is demonstrated. In the simulation, a rate equation model for the intracavity Tm and Ho laser is established to provide theoretical guidance for the experiment. In the experiment, a maximum output power of 12.1 W/11.8 W is realized with an optical-to-optical efficiency of 37.8%/36.9% and a slope efficiency of 39.2%/39.1% from 792 nm to 2050.7 nm/2088.7 nm. The power stability and beam quality M2 at the maximum output power are 0.2% and 1.2, respectively. The polarization extinction ratio (PER) is optimized by precisely controlling the temperature of the fiber gratings, resulting in the PER of 17.2 dB at the maximum output power. These results show that all-fiber intra-cavity core pumping is an effective way for realizing high-compactness and high-efficiency 2 mu m polarization-maintaining laser. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Cai, Xinyu , Wang, Yunpeng , Zhang, Dongming et al. Efficient 2 μm polarization-maintaining Ho-doped fiber laser with intracavity core pumping [J]. | OPTICS EXPRESS , 2025 , 33 (20) : 42469-42479 . |
| MLA | Cai, Xinyu et al. "Efficient 2 μm polarization-maintaining Ho-doped fiber laser with intracavity core pumping" . | OPTICS EXPRESS 33 . 20 (2025) : 42469-42479 . |
| APA | Cai, Xinyu , Wang, Yunpeng , Zhang, Dongming , Hu, Hailin , Yan, Weinan , Zhou, Wentao et al. Efficient 2 μm polarization-maintaining Ho-doped fiber laser with intracavity core pumping . | OPTICS EXPRESS , 2025 , 33 (20) , 42469-42479 . |
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Abstract ：
An ultralow insertion loss (IL) and ultrahigh polarization extinction ratio (PER) single-polarization (SP) coupler based on dual-core photonic bandgap fiber (DC-PBF) with thin slab waveguide (TSW) is proposed. By introducing the TSW structure into the DC-PBF, the loss of the secondary eigenstate of polarization (ESOP) mode is significantly increased through the strong mode coupling with the higher-order TE/TM mode of the TSW. Thus, the SP performance is achieved through the significantly high loss of the secondary ESOP mode in conjunction with the relatively low loss of the primary ESOP mode. In order to design ultralow IL and ultrahigh PER SP couplers based on DC-PBF with TSW, the low-loss SP DC-PBF with TSW is established by considering the impacts of structure parameters and wavelength on both loss and coupling performance. Furthermore, the dependences of powers, coupling ratio, and PER in x(y)-polarization in two cores with different lengths are analyzed for the SP coupler based on DC-PBF with TSW. Finally, three ultralow IL and ultrahigh PER 3 dB SP couplers based on DC-PBF with TSW are designed through theoretical calculation of fabrication tolerance and operation bandwidth. These couplers exhibit narrow-band high PER (similar to 27.2 dB), short-length ultralow IL (similar to 0.00054 dB), and long-length ultrahigh PER (similar to 61.88 dB), respectively. The proposed ultralow IL and ultrahigh PER SP couplers based on DC-PBF with TSW have potential applications in high-precision resonant PBF optic gyroscopes as well as other PBF applications.
Keyword ：
Photonic bandgap fibers Photonic bandgap fibers single-polarization single-polarization Optical fiber couplers Optical fiber couplers Couplers Couplers Optical losses Optical losses Claddings Claddings dual-core dual-core Photonic band gap Photonic band gap Gyroscopes Gyroscopes Optical fiber losses Optical fiber losses Couplings Couplings Optical fiber communication Optical fiber communication Optical fiber polarization Optical fiber polarization
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| GB/T 7714 | Zhu, Yunhao , Yao, Chuanfei , Wang, Xuan et al. Single-Polarization Coupler Based on Dual-Core Photonic Bandgap Fiber With Thin Slab Waveguide [J]. | IEEE PHOTONICS JOURNAL , 2025 , 17 (2) . |
| MLA | Zhu, Yunhao et al. "Single-Polarization Coupler Based on Dual-Core Photonic Bandgap Fiber With Thin Slab Waveguide" . | IEEE PHOTONICS JOURNAL 17 . 2 (2025) . |
| APA | Zhu, Yunhao , Yao, Chuanfei , Wang, Xuan , Ren, Guochuan , Liu, Shu , Si, Jiaqian et al. Single-Polarization Coupler Based on Dual-Core Photonic Bandgap Fiber With Thin Slab Waveguide . | IEEE PHOTONICS JOURNAL , 2025 , 17 (2) . |
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Abstract ：
Hollow-core photonic bandgap fibers (HC-PBFs) demonstrate exceptional performance with high damage threshold, low nonlinearity, low thermal sensitivity and ultralow bending loss. However, the spatial efficiency of HC-PBFs is constrained by the absence of the multi-core structure. In this study, we present a detailed proposal and design of multi-core HC-PBFs for the first time. The structure model of multi-core HC-PBFs are constructed and the structure parameters are optimized by the loss, mode, coupling, bending characteristics based on offset-core, scaling-core, and dual-core three structure models. Finally, three kinds of multi-core HC-PBFs structures including homogeneous weakly-coupled, heterogeneous weakly-coupled, and strongly-coupled are designed with comprehensive structure and performance parameters. Simulation results indicate low loss, quasi single-mode, low crosstalk, negligible bending loss, and remarkable multi-core guiding performance. The introduction of a multi-core structure expands the potential applications of HC-PBFs in fiber communications and long-haul miniaturized fiber optic gyroscopes, high power delivery, fiber sensing, etc.
Keyword ：
Bending Bending Multicore processing Multicore processing Frequency modulation Frequency modulation Optical fiber communication Optical fiber communication Couplings Couplings Optical fiber polarization Optical fiber polarization Hollow-core photonic bandgap fibers (HC-PBFs) Hollow-core photonic bandgap fibers (HC-PBFs) Claddings Claddings Optical fiber couplers Optical fiber couplers spatial efficiency spatial efficiency Optical fiber devices Optical fiber devices Optical fibers Optical fibers multi-core multi-core
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| GB/T 7714 | Zhu, Yunhao , Yao, Chuanfei , Wang, Xuan et al. Design of Multi-Core Hollow-Core Photonic Bandgap Fibers [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2025 , 43 (3) : 1364-1371 . |
| MLA | Zhu, Yunhao et al. "Design of Multi-Core Hollow-Core Photonic Bandgap Fibers" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 43 . 3 (2025) : 1364-1371 . |
| APA | Zhu, Yunhao , Yao, Chuanfei , Wang, Xuan , Ren, Guochuan , Liu, Shu , Si, Jiaqian et al. Design of Multi-Core Hollow-Core Photonic Bandgap Fibers . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2025 , 43 (3) , 1364-1371 . |
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Abstract ：
A hybrid chirped pulse amplification (CPA) system is demonstrated based on a fiber seed source and a three-stage Yb:YAG crystal amplifier. We investigate the mechanism of gain narrowing in a CPA system through theoretical and experimental research. The gain narrowing can be suppressed by pre-shaping the pulse spectrum via a fiber Bragg grating (FBG) with a specifically designed spectral characteristic before amplification. The compact compressor is based on a transmission diffraction grating with a line density of 1739 lines/mm. The high-order dispersion within the CPA system is compensated by a tunable dispersion stretcher. At a repetition rate of 200 kHz, the compressed average power of 64.15 W and pulse duration of 431 fs, corresponding to a pulse energy of 321 mu J and a peak power of 744 MW, is obtained. The polarization extinction ratio of the pulses is about 23 dB, and the M2 factor is less than 1.16. In addition, the long-term power stability is tested, and the root mean square of the average power is below 0.17% over 39.5 hours. Such good performance is beneficial to ultrafast material processing in scientific research and industrial fields. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Su, Meng , Meng, Xianghao , Zhao, Xianglong et al. Generation of 431 fs, 321 μJ femtosecond pulses from chirped-pulse Yb-fiber and Yb:YAG hybrid amplifiers by using FBG spectral shaping technique [J]. | OPTICS EXPRESS , 2025 , 33 (4) : 7218-7228 . |
| MLA | Su, Meng et al. "Generation of 431 fs, 321 μJ femtosecond pulses from chirped-pulse Yb-fiber and Yb:YAG hybrid amplifiers by using FBG spectral shaping technique" . | OPTICS EXPRESS 33 . 4 (2025) : 7218-7228 . |
| APA | Su, Meng , Meng, Xianghao , Zhao, Xianglong , Gong, Zhaoqing , Mao, Dun , Guo, Xiaoyang et al. Generation of 431 fs, 321 μJ femtosecond pulses from chirped-pulse Yb-fiber and Yb:YAG hybrid amplifiers by using FBG spectral shaping technique . | OPTICS EXPRESS , 2025 , 33 (4) , 7218-7228 . |
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