Explanipedia

Simultaneous enhancement of TMI and SRS suppression enabled by tuning the refractive index profile of a low-NA YDF for high power single-mode fiber laser Open

Cui Mengfan, Chongwei Wang, Haobo Li, Yang Liu, Zhiyong Pan , et al. · 2025

To mitigate the limitations of stimulated Raman scattering (SRS) associated with low dopant concentrations in low numerical-aperture (NA) fibers, this study proposes a central refractive index (RI) dip design for low-NA fibers to further i…

Multi-stage amplification of laser near 980 nm enabled by absorption saturation of Yb-doped fiber Open

Maoni Chen, Jianqiu Cao, Shangde Zhou, Qi Zhang, Aimin Liu , et al. · 2025

Composite fiber Bragg grating written by femtosecond laser for Raman suppression in high-power fiber oscillators Open

Hao Li, Rong Zhao, Binyu Rao, Xinyu Ye, Baolai Yang , et al. · 2025

All-fiber highly efficient delivery of 2 kW laser over 2.45 km hollow-core fiber Open

Jing Shi, Binyu Rao, Zilun Chen, Zefeng Wang, Guangrong Sun , et al. · 2025

Anti-resonant hollow-core fibers have emerged as an important medium for high-power laser delivery due to their low optical nonlinearity and high damage threshold. However, current delivery systems of high-power laser based on anti-resonan…

2 kW Full-Open Cavity Random Raman Fiber Laser Employing Tapered Fiber Open

Xiangming Meng, Jinming Wu, Xiao Chen, Hanwei Zhang, Peng Wang , et al. · 2025

Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification Open

Wei Liu, Wei Liu, Yu Deng, Yisha Chen, Yang Huan , et al. · 2025

Dynamic analysis and deploying process control of large parabolic cylinder antennas Open

Zhiyi Wang, Zhicheng Song, Jinbao Chen, Chuanzhi Chen, Hanting Zhang , et al. · 2025

The deployable parabolic cylindrical antenna, due to its large structural scale, complex transmission linkages, and multiple closed-loop constraints, endures significant differential loads on its structural components during the deployment…

Transverse mode coupling in monolithic few-mode fiber laser oscillators Open

Binyu Rao, Jinbao Chen, Zefeng Wang, Hao Li, Baolai Yang , et al. · 2025

Mode control in a 7.2 kW near-single-mode monolithic fiber amplifier employing the gain-tailoring effect Open

Chongwei Wang, Minghuan Cui, Hu Xiao, Weiping Liu, Zilun Chen , et al. · 2025

In this paper, we investigate the performance of a high-power confined doped fiber amplifier to achieve high power and high beam quality. The impact of various factors, including core diameter, doping ratio, and numerical aperture, on the …

All-fiber highly efficient delivery of 2 kW laser over 2.45 km hollow-core fiber Open

Jing Shi, Binyu Rao, Zilun Chen, Zefeng Wang, Guangrong Sun , et al. · 2025

Anti-resonant hollow-core fibers (AR-HCFs) have emerged as an important medium for high-power laser delivery due to their low optical nonlinearity and high damage threshold. However, current delivery systems of high-power laser based on AR…

High Power Tandem Pumped Ytterbium-Doped Fiber Amplifier Employing Low-NA Fiber Open

Minghuan Cui, Chongwei Wang, Haobo Li, Zhiyong Pan, Hu Xiao , et al. · 2025

The power scaling of tandem pumped ytterbium-doped fiber lasers (YDFLs) is mainly limited by the nonlinear effect such as the stimulated Raman scattering (SRS). Applying a kind of YDF featuring a large mode field area (LMA) and few guided …

5.85 Kw Polarization-Maintained and All-Fiberized Amplifier with Narrow Linewidth and Near-Diffraction-Limited Beam Quality Assisted by Low-Numerical-Aperture Active Fiber Open

Yisha Chen, Huan Yang, Pengfei Ma, Qi Chen, Wei Liu , et al. · 2025

Composite Fiber Bragg Grating Written by Femtosecond Laser for Raman Suppression in High-Power Fiber Oscillators Open

Hao Li, Binyu Rao, Xinyu Ye, Baolai Yang, Meng Wang , et al. · 2025

12-Kw High Power Spectral Beam Combination Employing Dichroic Mirror with Active Tilt Control: Simulation and Experimental Demonstration Open

Jianing Cao, Peng Wang, Jinbao Chen, Xiulu Hao, Xiaoming Xi , et al. · 2025

Influence of radiation-induced attenuation on power scalability of single-frequency single-mode Yb-doped fiber amplifiers Open

Jianqiu Cao, Zhou Shang-De, Pengfei Liu, 黄值河 Huang Zhihe, Pengfei Ma , et al. · 2025

Power scalability of single-frequency single-mode Yb-doped fiber amplifiers is significant for their applications. Considering their potential applications in radiation environments, the influence of radiation-induced attenuation (RIA) on …

20 kW Monolithic Fiber Amplifier With Directly Dual-Wavelength Laser Diodes Counter Pumping Open

Xiangming Meng, Fengchang Li, Jinbao Chen, Xiaoming Xi, Baolai Yang , et al. · 2024

In this study, we demonstrate a high-power ytterbium-doped fiber laser (YDFL) based on laser diodes (LDs) directly pumping scheme. Tandem pumping and LD direct pumping are two common schemes for generating high-brightness laser output in Y…

Kilowatt high power ytterbium-doped fiber laser operation in a record-wide temperature range from -50 °C to 50 °C Open

Jinbao Chen, Jinming Wu, Fuqi Li, Peng Wang, Hanshuo Wu , et al. · 2024

We report on a kilowatt-level ytterbium-doped fiber laser that can operate stably over a record-wide temperature range from -50 °C to 50 °C with only an active fan-cooling system. The laser has demonstrated the reliability of continuous hi…

Power optimization of high-power random Raman laser with a full-open cavity Open

Jinming Wu, Peng Wang, Rumao Tao, Hanshuo Wu, Xiaoming Xi , et al. · 2024

Since the concept of distributed feedback fiber random laser was put forward, random Raman fiber laser (RRFL) has made great progress in high power operation. For RRFL with a full-open cavity, the simplest cavity structure, further power s…

Review of High-Power Continuous Wave Yb-Doped Fiber Lasers near 980 nm Open

Shangde Zhou, Jianqiu Cao, Maoni Chen, Zefeng Wang, Lei Si , et al. · 2024

In this paper, the development of a high-power continuous wave (CW) fiber laser near 980 nm is reviewed. This review is focused primary on the power evolution resulting from the designation of Yb-doped fibers, which is important in the sup…

Requirements on double-cladding Yb-doped fiber for power scaling of diffraction-limited fiber amplifiers Open

Jianqiu Cao, Maoni Chen, Zhihe Huang, Zefeng Wang, Jinbao Chen · 2024

Requirements on the double-cladding Yb-doped fiber (DCYF) for power scaling of diffraction-limited fiber amplifiers are studied in this paper. By considering the limitations of thermal lens and transverse mode instability separately, it is…

Demonstration of hundred-watt-level near-diffraction-limited monolithic fiber laser near 980 nm with step-index double-cladding Yb-doped fiber Open

Maoni Chen, Jianqiu Cao, Qi Zhang, Shengzhong Liu, Shangde Zhou , et al. · 2024

In this paper, a hundred-watt-level near-diffraction-limited step-index Yb-doped fiber (YDF) laser near 980 nm is demonstrated firstly, to the best of our knowledge. By using the 11.7-W 979-nm single-mode seed light, the in-band amplified …

A 7-kW narrow-linewidth fiber amplifier assisted by optimizing the refractive index of the large-mode-area active fiber Open

Pengfei Ma, Tianfu Yao, Wei Liu, Zhiyong Pan, Yisha Chen , et al. · 2024

The high-power narrow-linewidth fiber laser has become the most widely used high-power laser source nowadays. Further breakthroughs of the output power depend on comprehensive optimization of stimulated Brillouin scattering (SBS), stimulat…

Theoretical study on radiation effect on threshold of transverse mode instability of Yb-doped fiber amplifiers Open

Jianqiu Cao, Zhou Shang-De, Pengfei Liu, 黄值河 Huang Zhihe, Zefeng Wang , et al. · 2024

Yb-doped fiber amplifiers and their applications in radiation environments have become more and more attractive in recent years. However, the radiation effect will cause damage to the Yb-doped fibers, which can give negative effect on the …

Temperature Dependence of Spectral Properties of Yb-Doped Superfluorescent Fiber Source Open

Jinming Wu, Fengchang Li, Peng Wang, Hanwei Zhang, Hanshuo Wu , et al. · 2023

Fiber laser has been developed to the point where the average power scaling can reach several kilowatts readily for oscillators and more for amplifiers. In the meanwhile, the thermal effects inside the fiber laser also become prominent. Te…

Raman suppression in high-power fiber oscillators by femtosecond-written chirped and tilted fiber Bragg gratings Open

Hao Li, Jinbao Chen, Xinyu Ye, Binyu Rao, Meng Wang , et al. · 2023

Realizing stimulated Raman scattering (SRS) suppression is a key topic for high-power fiber lasers. Here, we report an effective and simple strategy for SRS suppression using chirped and tilted fiber Bragg gratings (CTFBGs) in high-power f…

6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects Open

Xin Tian, Binyu Rao, Meng Wang, Xiaoming Xi, Baolai Yang , et al. · 2023

Single-stage high-power narrow-linewidth fiber laser has been investigated intensively recently because of its simple and robust configuration and great potential in spectral/coherent beam combination. In this work, a 6 kW narrow-linewidth…

Research of Transverse Mode Instability in High-Power Bidirectional Output Yb-Doped Fiber Laser Oscillators Open

Fengchang Li, Xinyi Ding, Peng Wang, Baolai Yang, Xiaoming Xi , et al. · 2023

Bidirectional output fiber laser oscillators can realize two high-power laser outputs employing only a single-laser resonant cavity and hold the advantages of being low cost and of compact size. However, like other fiber lasers, their powe…

High power mid-infrared fiber amplifier at 3.1 µm by acetylene-filled hollow-core fibers Open

Wei Huang, Xin Zhang, Zhiyue Zhou, Zhixian Li, Yulong Cui , et al. · 2023

We characterized high-power continuous-wave (CW) and pulsed mid-infrared (mid-IR) fiber amplifiers at a wavelength of 3.1 µm in acetylene-filled hollow-core fibers (HCFs) with a homemade seed laser. A maximum CW power of 7.9 W was achieved…

Femtosecond laser fabrication of chirped and tilted fiber Bragg gratings for stimulated Raman scattering suppression in kilowatt-level fiber lasers Open

Hao Li, Meng Wang, Baiyi Wu, Xinyu Ye, Chenhui Gao , et al. · 2023

Chirped and tilted fiber Bragg gratings (CTFBGs) are important all-fiber filtering components in high-power fiber lasers for stimulated Raman scattering (SRS) suppression. The fabrication of CTFBGs in large-mode-area double-cladding fibers…

Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators Open

Hao Li, Baolai Yang, Meng Wang, Chenhui Gao, Baiyi Wu , et al. · 2023

In this paper, a fs-laser phase mask inscription system based on a galvanometer scanning strategy is designed and set up for the fabrication of large-core fiber Bragg gratings (FBGs). Based on this setup, a homogeneous cross-sectional refr…

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