高功率飞秒脉冲光纤激光系统
High-power femtosecond pulses fiber laser system
杨康文 1郝强 1李文雪 1曾和平1
作者信息
- 1. 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
- 折叠
摘要
基础科学研究和超精细工业加工领域的发展迫切需要高重复频率、高功率的飞秒脉冲激光.采用啁啾脉冲放大技术,以掺镱双包层光子晶体光纤作为增益介质,搭建了高平均功率飞秒脉冲光纤激光系统.系统包括被动锁模振荡器、脉冲展宽器、单模光纤预放大器、光子晶体光纤功率放大器和脉冲压缩器5部分.实验上获得了重复频率40 MHz、平均功率150 W、脉冲宽度273 fs的超短脉冲输出.整个系统置于3m×1.5m的光学平台上,通过模块化和集成化的改进,该系统体积有望大幅度减小,为科学研究和工业应用提供有力工具.
Abstract
High-repetition-rate high-power femtosecond pulses are urgently needed for the development of both scientific research and hyperfine industrial processing. In this paper, chirped pulsed amplification method was used to generate high-repetition-rate high-power ultrashort pulses. Yb-doped large-mode-area double-clad photonic crystal fiber was employed as the gain medium due to the near diffraction limit beam quality as well as the excellent heat dissipation character. The system included passive mode-locked ultrashort pulse laser oscillator, diffraction grating based stretcher, single mode fiber pre-amplifier, double-clad fiber main-amplifier, and transmission grating based pulse compressor. A repetition rate of 40 MHz with pulse width of 273 fs and average power of 150 W was obtained from the fiber laser system, which was placed on the 3 m×l.5 m optical platform. By further improving, the volume of the system is expected to substantially reduce, and the system will become a powerful tool for scientific research and industrial applications.
关键词
高功率飞秒激光器/光纤激光器/双包层光纤Key words
high-power femtosecond laser/fiber laser/double-clad fiber引用本文复制引用
基金项目
上海市自然科学基金(10ZR1409000)
出版年
2011
NETL
NSTL
维普
万方数据