Explanipedia

Over 2 kW peak power quasi-continuous-wave thulium-doped fiber oscillator Open

Yu Lin, Deqin Ouyang, Fuhao Yang, Guanhao Chen, Yewang Chen , et al. · 2025

High-performance quasi-continuous-wave fiber lasers are highly sought after for numerous applications. In this work, a high power quasi-continuous-wave thulium-doped fiber oscillator is demonstrated. The arc-fusion parameters of the gain f…

Physics-informed Fourier Basis Neural Network for Fluid Mechanics Open

Chao Wang, Shilong Li, Zelong Yuan, Chunyu Guo · 2025

Conventional machine learning approaches struggle to capture periodic patterns and solve quasi-periodic boundary problems in fluid mechanics. This study proposes a physics-informed Fourier basis neural network (PIFBNN) that integrates adap…

Simultaneous generation of 5.87 W average and 0.75 MW peak power at 3.1 μm from a single pass, single stage parametric source Open

Xianwei Xiong, Junqing Zhao, Liqiang Mo, Jianbin Ye, Lai Qun , et al. · 2025

In an optical parametric source, a well-designed tightly focused pump beam is almost regarded as the sole choice, since it can significantly lower the pump threshold and enhance the conversion efficiency. However, this does not mean that t…

ConquerFear-HK: A Randomized Controlled Trial of a Metacognition-Based, Manualized Intervention for Fear of Cancer Recurrence among Chinese Cancer Survivors Open

Danielle Wing Lam Ng, Raymond T. Ng, Chunyu Guo, Julia Y. Chan, Richard Fielding , et al. · 2025

Introduction: Fear of cancer recurrence (FCR) is a prominent clinical issue among cancer survivors. This study evaluated the effectiveness of the culturally adapted ConquerFear-HK intervention in reducing FCR among Chinese cancer survivors…

Optimal timing for tracheostomy in severe ischemic stroke patients: early or standard incision? Open

Chunyu Guo, Heng Ye, Xinglin Chen, Yuting Luo, Shaoqing Wu , et al. · 2025

Early tracheostomy does not affect the long-term outcomes of patients with severe ischemic stroke, but it may offer potential benefits.

Research on the External Restrained Units Stiffness of Segmented Assembled Buckling-Restrained Braces Open

Shuai Xu, Chunyu Guo, Yan Li, Xiuli Wang · 2025

Investigating the Thermal Insulation of the Typical Winter Clothing by the Elderly: Towards Accurate Predictions of Thermal Physiological Responses Open

Yijun Lü, Xuan Zhang, Chunyu Guo, Jingxian Xu, Yehu Lu · 2025

Over 100-kW peak power picosecond pulse generation at 2924 nm via efficient single-pass optical parametric generation with broadband tunability Open

Xianwei Xiong, Junqing Zhao, Sizhi Xu, Liqiang Mo, Yewang Chen , et al. · 2024

We report a high peak power mid-infrared (MIR) source via efficient optical parametric generation (OPG) in a piece of 50-mm-long MgO: PPLN crystal pumped by using a near-infrared (NIR) narrow-band picosecond laser source. The highest peak …

Numerical investigation of divided-pulse amplification assisted by a hollow core anti-resonant fiber Open

Hang Ren, Xing Luo, Jiachen Wang, Fanlong Dong, Ying Yang , et al. · 2024

An all-fiber structure laser based on divided-pulse amplification technology and a hollow core anti-resonant fiber (HC-ARF) is proposed. We numerically investigate the process of divided-pulse amplification in the structure based on the ve…

Over 10‐W, 2.0‐μm, Broadband, All‐Fiber Amplified Spontaneous Emission Source Based on Spectrum Combination Open

J. Ding, Kehui Zhai, Deqin Ouyang, Yewang Chen, Minqiu Liu , et al. · 2024

Herein, Tm‐doped fiber (TDF) amplified spontaneous emission (ASE) and Ho‐doped fiber ASE to realize a high‐power, 2.0‐μm‐broadband, all‐fiber ASE source are combined. By in‐band pumping the Ho‐doped fiber ASE with TDF ASE, an output power …

Transverse voltage in anisotropic hydrodynamic conductors Open

Kaize Wang, Chunyu Guo, Philip J. W. Moll, Tobias Holder · 2024

Weak momentum dissipation in ultra-clean metals gives rise to novel non-Ohmic current flow, including ballistic and hydrodynamic regimes. Recently, hydrodynamic flow has attracted intense interest because it presents a valuable window into…

Fifteen Pathways between Electric Vehicles and Public Health: A Transportation–Health Conceptual Framework Open

Chunyu Guo, Becky P.Y. Loo, Kuishuang Feng, H. Oliver Gao, K. Zhang · 2024

The health impact of electric vehicles (EVs) is complex and multifaceted, encompassing reductions in air pollutants, improvements in road safety, and implications for social equity. However, existing studies often provide fragmented insigh…

All-fiber gain-switched laser at 2.8 μm Open

H.M. Chen, Tao Wang, Chunyu Guo, Shuangchen Ruan · 2024

The mid-infrared pulsed lasers at 2.8 μm are widely used in scientific and biomedical fields. By cascading gain-switches, a 2.8 μm all-fiber gain-switched laser was achieved. The pump and oscillator are respectively a homemade 976 nm high …

Enhanced performance of all-PM Ho-doped fiber oscillator using NPE-SESAM hybrid mode-locking Open

Xiting Chen, Bailing Wen, Hong Zhang, Xingyuan Long, Enqi Zhang , et al. · 2024

We demonstrate a 2.08 µm all-polarization-maintaining (PM) holmium-doped fiber oscillator using a hybrid mode-locking technique with nonlinear polarization evolution (NPE) and a semiconductor saturable absorber mirror (SESAM). This oscilla…

Elastic moduli from crystalline micro-mechanical oscillators carved by focused ion beam Open

Amelia Estry, Carsten Putzke, Chunyu Guo, Maja D. Bachmann, Anna Duvakina , et al. · 2024

The elastic moduli provide unique insights into the thermodynamics of quantum materials, particularly into the symmetries broken at their phase transition. Here, we present a workflow to carve crystalline resonators via focused ion beam mi…

5.4 W, 2.35 µm cascaded Raman fiber laser pumped by dissipative soliton resonance-like pulses Open

Fuhao Yang, Qiyan Gu, Yu Lin, Meng Wang, Minqiu Liu , et al. · 2024

We present a nonlinear amplifying loop mirror-based mode-locked fiber laser. By adjusting the pump power, the proposed laser exhibits a dissipative soliton resonance (DSR)-like pulse operation with a maximum pulse width of 150 ns. Subseque…

Mode-locked large-mode-area Er/Yb-doped fiber oscillator via nonlinear polarization evolution with enhanced mode suppression Open

Xinzhou Chen, Hong Zhang, Cuiling Liu, Xiting Chen, Chunyu Guo , et al. · 2024

We report a mode-locked Er/Yb-doped large-mode-area (LMA) fiber oscillator based on nonlinear polarization evolution (NPE), which utilizes a linear cavity primarily composed of polarization-maintaining (PM) fibers. The oscillator operates …

Compact and efficient high-power mid-infrared supercontinuum fiber laser source based on a noise-like pulse and germania fiber Open

Meng Wang, Qiyan Gu, Fuhao Yang, Deqin Ouyang, Yewang Chen , et al. · 2024

Here, we demonstrate a compact and efficient high-power mid-infrared supercontinuum (MIR-SC) laser source based on a tunable noise-like pulse (NLP) fiber laser system and a short section of single-mode germania-core fiber (GCF). The NLP al…

Progress and Performance Analysis of Mode-Locked Thin-Disk Oscillators Open

Fayyaz Javed, Sizhi Xu, Yubo Gao, Zuoyuan Ou, Junzhan Chen , et al. · 2024

Revealing the Effect of Yttrium on the Oxidation Behavior of Ni-Based Single Crystal Superalloys Open

Hui Xu, Enhui Wang, Xinyue Ye, Chunyu Guo, Linlin Zhou , et al. · 2024

Nonlinear Absorbing-Loop Mirror Mode-Locked Fiber Laser Enabling 135 Fs Dechirped Pulses Open

Xianwei Xiong, Junqing Zhao, Liqiang Mo, Yewang Chen, Deqin Ouyang , et al. · 2024

Thin-disk multi-pass amplifier for kilowatt-class ultrafast lasers Open

Sizhi Xu, Xing Liu, Yubo Gao, Zuoyuan Ou, Fayyaz Javed , et al. · 2024

We report on an improved ytterbium-doped yttrium aluminum garnet thin-disk multi-pass amplifier for kilowatt-level ultrafast lasers, showcasing excellent beam quality. At a repetition rate of 800 kHz, the 6.8 ps, 276 W seed laser is amplif…

Realizing Enhanced Lithotripsy Efficiency Using 700 W Peak Power Thulium-Doped Fiber Laser Open

Yu Lin, Qiyan Gu, Yewang Chen, Meng Wang, Junqing Zhao , et al. · 2024

High-repetition-rate and High-power Efficient Picosecond Thin-disk Regenerative Amplifier Open

Sizhi Xu, Yubo Gao, Xing Liu, Yewang Chen, Deqin Ouyang , et al. · 2023

We present an effective approach to realize a highly efficient, high-power and chirped pulse amplification-free ultrafast ytterbium-doped yttrium aluminum garnet thin-disk regenerative amplifier pumped by a zero-phonon line 969 nm laser di…

All-polarization-maintaining mode-locked Holmium-doped fiber laser based upon nonlinear polarization evolution Open

Lisha Tu, Ziya Tang, Keyi Li, Jiachen Wang, Hua Lin , et al. · 2023

Phonon collapse and anharmonic melting of the 3D charge-density wave in kagome metals Open

Martin Gutierrez‐Amigo, Đorđe Dangić, Chunyu Guo, Claudia Felser, Philip J. W. Moll , et al. · 2023

The charge-density wave (CDW) mechanism and resulting structure of the AV3Sb5 family of kagome metals has posed a puzzling challenge since their discovery four years ago. In fact, the lack of consensus on the origin and structure of the CD…

Highly efficient octave-spanning long-wavelength infrared generation with a 74% quantum efficiency in a χ(2) waveguide Open

Bo Hu, Xuemei Yang, Jiangen Wu, Siyi Lu, Hang Yang , et al. · 2023

976 nm noise-like pulse mode-locked fiber laser Open

Hongyi Chen, Jiachen Wang, Fanlong Dong, Linpeng Yu, Xing Luo , et al. · 2023

Pulse lasers with an output wavelength of 976 nm play an important role in scientific research and industrial fields. Using a nonlinear optical loop mirror (NOLM), we build a 976 nm mode-locked fiber laser with a figure-9 resonant cavity. …

Soliton rain in all-polarization-maintaining mode locked fiber laser Open

Chunyu Guo, Keyi Li, Zhenhao Wang, Zhuobiao Li, Xiao Zhang , et al. · 2023

For the first time the phenomenon of soliton rain is observed in a mode-locked fiber laser with all-polarization-maintaining (all-PM) architecture. The laser is mode-locked using a semiconductor saturable absorber mirror (SESAM) and operat…

Two Individual Super-Bound State Modes within Band Gap with Ultra-High Q Factor for Potential Sensing Applications in the Terahertz Wave Band Open

Yinbing An, Tao Fu, Chunyu Guo, Jihong Pei, Zhengbiao Ouyang · 2023

Bound states in the continuum (BICs) garnered significant research interest in the field of sensors due to their exceptionally high-quality factors. However, the wide-band continuum in BICs are noise to the bound states, and it is difficul…

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