全光纤高能量飞秒脉冲激光放大系统  

All-fiber high-energy femtosecond pulse amplification system

作　　者：王锋[1] 李敏[1] 杨康文[1] 贺明洋 夏宇[1] 袁帅[1] 曾和平[1,2,3] WANG feng;LI Min;YANG Kangwen;HE Mingyang;XIA Yu;YUAN Shuai;ZENG Heping(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China;Jinan Institute of Quantum Technology,Jinan 250101,China)

机构地区：[1]上海理工大学光电信息于计算机工程学院,上海200093 [2]华东师范大学精密光谱科学与技术国家重点实验室,上海200062 [3]济南量子技术研究院,山东济南250101

出　　处：《光学技术》2021年第3期293-298,共6页Optical Technique

基　　金：国家自然科学基金委重大科学仪器研发项目(11727812,61927813)。

摘　　要：研究了一种全光纤飞秒脉冲放大系统。其采用非线性放大环形镜结构的谐振腔输出宽光谱种子光,通过光纤啁啾脉冲放大技术抑制功率放大过程中的非线性累积;主放大部分结合双包层光纤与大模场光子晶体光纤熔接技术,输出中心波长1030nm,平均功率16.9W的高质量皮秒脉冲,经空间光栅对补偿色散后脉冲宽度324fs,单脉冲能量12.2μJ,峰值功率约26.4MW。该放大系统采用保偏光纤特种熔接技术实现全光纤化,相较于空间耦合放大具有光路结构简单,环境稳定性高等特点,有望推动高能量飞秒光纤激光工业化进程,提升其在复杂使用环境的适应性。An all-fiber femtosecond pulses amplification system was researched. A nonlinear amplifying loop mirror resonator delivering broad-spectrum seed pulses was employed, and the fiber chirped pulse amplification technique was adopted to supress the accumulation of nonlinearity during the power amplification process;Besides, combining the fiber fusion spliced technique of the double-clad fiber and large-mode field photonic crystal fiber, the main amplification system generated high-quality picosecond pulses with 1030 nm central wavelength and 16.9 W average power. After the spatial grating pairs’ dispersion compensation, the pulses duration had been compressed to 324 fs with energy of 12.2μJ, corresponding to a peak power of about 26.4 MW. All-fiber structure was realized by using special polarization maintaining fiber fusion technology instead of free-space coupling, the optical path structure and stability of environment was further optimized. All the ways mentioned above are expected to improve the process of high-energy fiber laser industrialization and adaptability in the complex environment.

关 键 词：飞秒脉冲激光 光子晶体光纤 单脉冲能量 双包层光纤 保偏光纤 峰值功率 放大系统 谐振腔 

分 类 号：TN248.1[电子电信—物理电子学]