光子学报, 2019, 48 (11): 1148015, 网络出版: 2019-12-10
重复频率1.2 GHz皮秒脉冲全光纤掺镱激光器
Picosecond Pulsed All-fiber Yb-doped Laser with 1.2 GHz Repetition Rate
掺镱光纤激光器 被动锁模 高重频脉冲调制器 超短脉冲 耗散孤子 Ytterbium doped fiber laser Passively mode-locking High-repetition-rate pulsed modulator Ultra-short pulse Dissipative soliton
摘要
研究实现了基于半导体可饱和吸收体被动锁模的高重频全光纤掺镱皮秒脉冲激光器.种子源采取环形腔结构,当抽运功率为112 mW时,获得了稳定的锁模脉冲激光,其中心波长为1 064.1 nm,3 dB谱宽为3.6 nm,脉冲宽度为4.2 ps,重复频率为19.2 MHz.受限于谐振腔长度,光纤激光器重复频率很难得到进一步提高.因此设计并搭建了一种基于分束器和延时光纤的全新低损耗高重频脉冲调制器,将种子激光重复频率提高到1.2 GHz.该设计有效降低了脉冲在耦合过程中的能量损耗,为提高全光纤超短脉冲激光器重复频率提供了新途径.
Abstract
A high repetition rate all-fiber picosecond laser which mode-lacked by a semiconductor saturable absorber mirror is demonstrated. Stable mode-locked pulse train is obtained when the pump power is 112 mW in the ring cavity. The pulse width of the output laser is 4.2 ps at the repetition rate of 19.2 MHz, and it exhibits a spectral bandwidth of 3.6 nm at the center wavelength of 1 064.1 nm. Due to the length of the cavity, it is difficult to increase the repetition rate of the fiber laser. So a novel low-loss high-repetition-rate pulsed laser modulator based on optical coupler and time delay fiber is introduced to increase the repetition rate of the seed to 1.2 GHz. This design effectively reduces the energy loss of the pulse during coupling, which provides a new way to boost the repetition rate of the all-fiber ultra-short pulsed laser.
韦小乐, 魏淮, 盛泉, 付士杰, 史伟, 姚建铨. 重复频率1.2 GHz皮秒脉冲全光纤掺镱激光器[J]. 光子学报, 2019, 48(11): 1148015. WEI Xiao-le, WEI Huai, SHENG Quan, FU Shi-jie, SHI Wei, YAO Jian-quan. Picosecond Pulsed All-fiber Yb-doped Laser with 1.2 GHz Repetition Rate[J]. ACTA PHOTONICA SINICA, 2019, 48(11): 1148015.