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High pulse energy femtosecond large-mode-area photonic crystal fiber laser
YouJian Song,MingLie Hu,Chi Zhang,Lu Chai,ChingYue Wang
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-008-0511-2
Abstract: A high pulse energy femtosecond fiber laser based on a large-mode-area photonic crystal fiber is demonstrated. A segment of Yb-doped single-polarization large-mode-area photonic crystal fiber with extremely low nonlinearity is explored as gain media of this fiber laser, resulting in intrinsically environmentally stability. The fiber laser is based on a linear cavity with dispersion compensation free configuration, and the stable mode-locking is obtained by a semiconductor saturable absorber mirror (SESAM). The fiber laser directly generates 2.5 W of average power at a repetition rate of 51.4 MHz, corresponding to a single pulse energy of 50 nJ. The output pulse duration is 4.2 ps, which is dechirped to 410 fs after extracavity dispersion compensation. The nonlinear absorption of SESAM determines the pulse shaping at low output power, while the mode-locking mechanism is under the balance between spectrum broadening from self-phase-modulation and gain filtering at the high output power.
Mechanism and elimination of spectrum filtering in a high power mode-locked fibre laser witha free output coupler

Zhang Yu-Ying,Zhang Chi,Hu Ming-Lie,Wang Si-Ji,Song You-Jian,Chai Lu,Wang Qing-Yue,

中国物理 B , 2010,
Abstract: The filtering mechanism of a free output coupler mode-locked laser based on large-mode-area photonic-crystal fibre is analysed. A filtering-soliton mode-locked laser with 495~fs pulse width and 21 nJ pulse energy is achieved. Another novel cavity configuration is established to eliminate the filtering effect. Pulses, each 457~fs in width and 16.5 nJ in energy, are obtained in a soliton-like regime. Pulses, each 387~fs in width and 15.8 nJ in energy, are also generated in a stretched pulse regime and could be dechirped to 119~fs externally to the cavity.
A mode-locked Yb3+-doped double-clad large-mode-area fiber laser
掺Yb3+双包层大模场面积光纤锁模激光器

Song You-Jian,Hu Ming-Lie,Liu Qing-Wen,Li Jin-Yan,Chen Wei,Chai Lu,Wang Qing-Yue,
宋有建
,胡明列,刘庆文,李进延,陈 伟,柴 路,王清月

物理学报 , 2008,
Abstract: A compact and highly stable high pulse energy passively mode-locked fiber laser is presented. A segment of Yb3+-doped double-clad large-mode-area fiber with extremely low nonlinearity is developed as the active medium. The self-starting mode-locked operation is achieved by the cooperation of nonlinear polarization evolution and semiconductor saturable-absorber mirror. The fiber laser generates laser pulses with the average power of 160mW at the repetition rate of 55.9MHz (corresponding to pulse energy of 3nJ), and the pulse duration is 10.6ps.
A novel bend-resistant large-mode-area photonic crystal fiber
新型抗弯曲大模场面积光子晶体光纤

Lou Shu-Qin,Lu Wen-Liang,Wang Xin,
娄淑琴
,鹿文亮,王鑫

物理学报 , 2013,
Abstract: 研制出一种新型抗弯曲大模场面积石英光子晶体光纤. 利用光子晶体光纤结构设计的灵活性, 通过规划缺陷的位置及空气孔的尺寸, 实现了大模场面积单模及低弯曲损耗特性.应用建立的实际光子晶体光纤特性分析模型, 研究了研制光纤的模式特性和弯曲特性, 在波长1064 nm处, 平直状态下光纤的模场面积可以达到2812 μm2, 基模限制损耗为0.00024 dB/m, 高阶模限制损耗高于1.248 dB/m. 基模和高阶模之间的高传输损耗差, 保证了在获得大模场面积的同时实现单模传输. 弯曲半径和弯曲方向角所带来弯曲损耗变化的研究结果显示, 即使在弯曲半径小到5 cm时, 弯曲损耗也在10-3 dB/m量级以下, 而且在弯曲半径为30 cm时光纤可承受的弯曲方向角范围扩展至-60°–60°. 研制的光纤具有良好的低弯曲损耗特性, 可有效解决非对称结构所带来的光纤弯曲特性对弯曲方向角敏感的问题. 该光纤在高功率光纤激光器、放大器及高功率传输等技术领域具有重要的应用价值.
Sub-100 fs high power Yb-doped single polarization large-mode-area photonic crystal fiber laser amplifier
亚百飞秒高功率掺镱大模面积光子晶体光纤飞秒激光放大器的实验研究

Liu Bo-Wen,Hu Ming-Lie,Song You-Jian,Chai Lu,Wang Qing-Yue,
刘博文
,胡明列,宋有建,柴 路,王清月

物理学报 , 2008,
Abstract: An ytterbium-doped single polarization large-mode-area photonic crystal fiber laser amplifier is demonstrated, which can deliver average power of 16 W at a repetition rate of 50 MHz, corresponding to 320 nJ pulse energy. The length of the fiber is 3.5 m, and the pulse could be shorter since the spectrum is further broadened due to the SPM. The pulse duration is compressed to 85 fs after passing through a grating pair. The oscillator and amplifier of the system are composed of the same single polarization large-mode-area photonic crystal fiber, resulting in better environmental stability and compactness.
Dissipative-soliton mode locked laser based on large-mode-area photonic crystal fiber
大模场面积光子晶体光纤耗散孤子锁模激光器

Zhang Xin,Hu Ming-Lie,Song You-Jian,Chai Lu,Wang Qing-Yue,
张鑫
,胡明列,宋有健,柴路,王清月

物理学报 , 2010,
Abstract: A dissipative-soliton mode locked laser based on Yb-doped single polarization large-mode-area photonic crystal fiber is demonstrated. The dissipative soliton dynamics is explored by numerical simulation. Compared with all normal dispersion fiber lasers, there are more pulse shaping mechanisms in a dissipative-soliton fiber laser, including the nonlinear absorption of SESAM, spectrum filtering of the chirped pulse and gain dispersion, which results in robust and stable operation. Among them, spectrum filteri...
Experimental Study on Large-mode-area Yb3+-doped Double-clad Fiber Laser
大模面积掺Yb3+双包层光纤激光器的实验研究

(,
谢春霞
,吕福云,王健,胡姝玲,张书敏,董法杰,董孝义

光子学报 , 2005,
Abstract: 本文研究了在连续泵浦和脉冲泵浦两种情况下,大模面积(LMA)掺Yb^3 双包层光纤激光器的输出特性,采用连续泵浦,在最大泵浦功率为10.4W时,得到了平均功率4.6W、中心波长1.09μm的准连续激光输出.采用脉冲泵浦,得到了脉宽小于50ns、峰值功率为5.3kW、重复频率为5kHz、单脉冲能量为0.26mJ的稳定的调Q脉冲输出。
Experimental Study of Large-Mode-Area Fiber Amplifier for Coherent Combination
用于相干合成大模面积光纤放大器的实验研究

GUO Zhan-cheng,FU Sheng-gui,JIA Xiu-jie,LIU Yang-e,SI Li-bin,ZHANG Jian,YUAN Shu-zhong,DONG Xiao-yi,
郭占城
,付圣贵,贾秀杰,刘艳格,司立彬,张健,袁树忠,董孝义

光子学报 , 2007,
Abstract: Experimental research of a backward-pumped large-mode-area ytterbium-doped double-cladding fiber amplifier was reported for the use of the laser beam coherent combination.The amplifier obtained the highest output power of 1.61 W,with the amplified signal having the 3 dB linewidth of 0.027 nm at the peak wavelength of 1 058.37 nm,preserving the exceptional spectrum characteristics of the original signal.For the first time,was experimentally investigated the power evolvement of the residual pump beam,the forward beam,the backward beam and et al.in this type of amplifier.The aim of this research was to explore the feasible project of the laser beam coherent combination.The designed linewidth of the laser beam both alleviated the coherent combination and suppressed Stimulated Brillouin Scattering(SBS) effectively.
Theoretical design of a large effective mode area microstructure optical fiber
S.M. Abdur Razzak,Yoshinori Namihira
Optica Applicata , 2010,
Abstract: This paper presents a numerical design of a large effective mode area microstructure optical fiber. Using the finite difference time domain numerical simulation method it is shown that the proposed fiber can assume very high effective area of the order 122 to 252 μm2, negative dispersion-flat properties around the 1550 nm wavelength, and very low confinement losses of the order 10–5 dB/km. A hexagonal eight ring silica-air microstructure is used with two air-hole dimensions and a common pitch. A microstructure optical fiber with large effective mode area, low confinement loss, and dispersion-flat property may be promising for next generation optical data transmission applications.
Numerical analysis of mode locking in multi-core photonic crystal fiber
XiaoHui Fang,MingLie Hu,YanFeng Li,Lu Chai,QingYue Wang
Chinese Science Bulletin , 2010, DOI: 10.1007/s11434-010-3190-8
Abstract: With linearly coupled nonlinear Schrodinger equations, numerical analysis has been performed on the mode locking forming procedure of a fiber laser in the linear cavity configuration. The fiber is Yb-doped multi-core photonic crystal fiber and semiconductor saturable absorber mirror (SESAM) is adopted as the nonlinear transmission element to start mode locking. Because of the noise randomness, initial pulse would be picked out by SESAM in one or more cores which makes the multi-core mode locking quite different from single-core one. The two situations are compared and fully discussed. Mode locking in multi-core photonic crystal fiber laser can be realized only if the couple coefficient between the cores and the temporal overlap between the pulses in different cores are large enough.
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