1GHz,48.8fs高重复频率掺镱光纤飞秒激光器研究
Study on 1GHz repetition rate,48.8fs Yb-doped femtosecond fiber laser
赵子陈 1陈俊宇 1于涵 1陈嘉宁 1沈嘉伟 1司璐 1曹彧之 1王志 2袁帅3
作者信息
- 1. 上海理工大学光电信息与计算机工程学院,上海 200093
- 2. 南开大学电子信息与光学工程学院现代光学研究所,天津 300350
- 3. 上海理工大学光电信息与计算机工程学院,上海 200093;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;华东师范大学重庆研究院精密光学重庆市重点实验室,重庆 401120
- 折叠
摘要
GHz基本重复频率光纤超短脉冲激光器由于具有宽光谱,窄脉宽等优势,在高速光刻,高端制造,天文探测,太赫兹检测,精密仪器等领域应用广泛.然而在实现1 GHz以上基本重复频率锁模的前提下,如何输出脉冲宽度在50fs以下的超短脉冲是当前科学研究的难点.文章以实现更宽光谱,更窄脉宽的GHz重复频率光纤超短脉冲激光器为目标,通过非线性偏振旋转锁模(NPR)技术,利用波分复用光纤准直器(WDM-Collimator)缩短激光谐振腔长度,最终实现了 48.8fs脉冲宽度的1GHz基本重复频率光纤激光器.该脉冲宽度是当前国际上1μm波段GHz基本重复频率光纤激光器的最窄直接输出脉冲宽度.最后对激光器集成形成样机,并有效降低制造成本,提升了系统稳定性.该激光样机可满足天文光梳、卫星导航等领域空间尺寸的需求,有望推动高重复频率光纤超短脉冲激光器工业化、商业化发展.
Abstract
Ultrashort fiber lasers with GHz repetition rate have already demonstrated their applications in laser com-munication,advanced manufacturing,astronomical and THz detection,et al,due to their advantages of large number of pulses per unit time,wide spectral coverage and narrow pulse duration.However,the main difficulty is how to yield pul-ses with duration less than 50fs and above 1GHz repetition rate at the same time.A 1.003GHz repetition rate Yb-doped fiber laser was built with 48.8fs pulse duration by using nonlinear polarization rotation mode locking(NPR).In our ap-proach,WDM-Collimator was employed in order to shorten the length of the cavity.This fiber laser had the shortest out-put pulse duration among all reported Yb-doped fiber lasers with fundamental repetition rate above 1GHz.Finally,the la-ser was integrated into a prototype,which effectively reduced the manufacturing cost and improved the stability.The la-ser is expected to promote the industrialization and commercialization of high repetition rate fiber ultrashort pulse lasers.
关键词
超快激光/激光谐振腔/光纤放大器和振荡器/光纤激光器/非线性光学/光纤Key words
ultrafast laser/laser resonator/optical fiber amplifier and oscillator/fiber laser/nonlinear optics/optical fiber引用本文复制引用
基金项目
国家重点研发计划(2018YFB0504400)
出版年
2024
NETL
NSTL
万方数据