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Fiber core mode leakage induced by refractive index variation in high-power fiber laser 被引量:1
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作者 闫平 王雪娇 +5 位作者 黄昱升 付晨 孙骏逸 肖起榕 李丹 巩马理 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第3期336-343,共8页
This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the... This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the power transfer between the core modes and the cladding modes during thermally-induced refractive index variations is established based on the mode coupling theory. The results of numerical simulations based on actual laser parameters are presented. Experimental measurements were also carried out, the results showed good agreement with the corresponding simulation results. 展开更多
关键词 double-clad fiber laser and amplifier Core loss cladding mode mode coupling theory
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Low-repetition-rate, all-polarization-maintaining Yb-doped fiber laser mode-locked by a semiconductor saturable absorber 被引量:2
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作者 肖晓晟 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第11期216-220,共5页
A low-repetition-rate, all-polarization-maintaining(PM)-fiber sub-nanosecond oscillator is presented, which is simple and low-cost, composed of standard components. The ring cavity is elongated by 114-m-long standar... A low-repetition-rate, all-polarization-maintaining(PM)-fiber sub-nanosecond oscillator is presented, which is simple and low-cost, composed of standard components. The ring cavity is elongated by 114-m-long standard PM fiber, and passively mode-locked by a fiber pigtailed semiconductor saturable absorber. Linearly polarized pulses with 1.66 MHz repetition rate and 22 dB polarization extinction ratio are generated at a wavelength of 1030 nm, which is determined by an intracavity filter. In addition, to demonstrate that the oscillator is a good seed for high energy pulse generation, an all-fiber master oscillator power amplifier is built and amplified pulses with energy about 2 μJ are obtained. 展开更多
关键词 mode-locked fiber laser polarization maintaining master oscillator power amplifier
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Influence of mode competition on beam quality of fiber amplifier
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作者 肖起榕 闫平 +3 位作者 孙骏逸 陈霄 任海翠 巩马理 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第10期235-241,共7页
Theoretical and experimental studies of the influence of the mode competition on the output beam quality of fiber amplifiers are presented. Rate equations and modal decomposition method are used in the theoretical mod... Theoretical and experimental studies of the influence of the mode competition on the output beam quality of fiber amplifiers are presented. Rate equations and modal decomposition method are used in the theoretical model. In the experiment, the output beam-quality factor of a fiber amplifier, which is based on a Yb-doped double-clad large mode area fiber as a function of the seed beam quality and the pump power of the amplifier, is measured. The experimental results are consistent with the theoretical analysis. 展开更多
关键词 fiber laser and amplifier mode competition beam quality
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260 fs,403 W coherently combined fiber laser with precise high‑order dispersion management 被引量:1
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作者 Shuangxi Peng Zhihao Wang +3 位作者 Feilong Hu Zhengyan Li Qingbin Zhang Peixiang Lu 《Frontiers of Optoelectronics》 EI CSCD 2024年第1期21-27,共7页
An ultrafast fiber laser system comprising two coherently combined amplifier channels is reported.Within this system,each channel incorporates a rod-type fiber power amplifier,with individual operations reaching appro... An ultrafast fiber laser system comprising two coherently combined amplifier channels is reported.Within this system,each channel incorporates a rod-type fiber power amplifier,with individual operations reaching approximately 233 W.The active-locking of these coherently combined channels,followed by compression using gratings,yields an output with a pulse energy of 504μJ and an average power of 403 W.Exceptional stability is maintained,with a 0.3%root mean square(RMS)deviation and a beam quality factor M^(2)<1.2.Notably,precise dispersion management of the front-end seed light effectively compensates for the accumulated high-order dispersion in subsequent amplification stages.This strategic approach results in a significant reduction in the final output pulse duration for the coherently combined laser beam,reducing it from 488 to 260 fs after the gratings compressor,while concurrently enhancing the energy of the primary peak from 65%to 92%. 展开更多
关键词 fiber lasers amplifier Power scaling Coherent beam combination Dispersion compensation
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Powerful 2 μm Silica Fiber Sources: A Review of Recent Progress and Prospects 被引量:3
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作者 Xiao-Xi Jin Xiong Wang +2 位作者 Pu Zhou Hu Xiao Ze-Jin Liu 《Journal of Electronic Science and Technology》 CAS CSCD 2015年第4期315-327,共13页
A review on the progress of powerful 2 μm silica fiber sources in past decades is presented. We review the state-of-the-art records and representative achievements of 2 μm high-average-power continuous- wave, pulsed... A review on the progress of powerful 2 μm silica fiber sources in past decades is presented. We review the state-of-the-art records and representative achievements of 2 μm high-average-power continuous- wave, pulsed fiber lasers and amplifiers, and powerful superfluorescent sources. Challenges which limit the further power scaling of 2 μm silica fiber sources are discussed, including pumping brightness limitation, thermal problem and nonlinear effects. Potential and promising roadmaps to go beyond these limitations, like tandem pumping and beam combining, are discussed. Prospects of powerful 2 μm silica fiber sources are also presented in the end of paper. 展开更多
关键词 Doped fiber amplifiers fiber lasers high power amplifiers infrared spectra.
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73 nJ, 109 fs Yb-doped fiber laser at 19 MHz repetition rate in amplifier similariton regime 被引量:1
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作者 Yizhou Liu Yifan Cui +2 位作者 Jian Zhang Aimin Wang Zhigang Zhang 《Photonics Research》 SCIE EI 2015年第5期248-251,共4页
We report femtosecond pulse generation in an amplifier similariton oscillator and a prechirped fiber amplifier system. The final output power is 1.4W, and the fundamental repetition rate is 19.1 MHz after a single sta... We report femtosecond pulse generation in an amplifier similariton oscillator and a prechirped fiber amplifier system. The final output power is 1.4W, and the fundamental repetition rate is 19.1 MHz after a single state fiber amplifier. The pulsewidth is 109 fs. 展开更多
关键词 Yb rate fs Yb-doped fiber laser at 19 MHz repetition rate in amplifier similariton regime NJ
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