Ma Jindong, Liu Huanhuan, Chen Yujang, Zhang Nan, Shum Perry Ping
Opt Express. 2023 Oct 9;31(21):34224-34231. doi: 10.1364/OE.503079.
We have proposed and demonstrated the generation of a high-energy, ultrashort pulse duration, GHz pulse burst polarization-maintaining fiber amplification system that utilizes both chirped-pulse amplification and self-similar amplification techniques. Such hybrid fiber amplification system produces 22 μJ-energy bursts of 200 pulses with a 1.02-GHz intra-burst pulse repetition rate and a 1-MHz inter-burst repetition rate. The center wavelength of the amplified compressed pulse is 1065 nm, with a 3 dB spectral bandwidth of 65 nm. The pulse duration of optimal compression is ∼35 fs, which represents the shortest pulse duration reported to date for any multi-microjoule class amplification system with a repetition rate at the GHz level. At the same time, only common double-cladding Yb-doped fiber is used as the gain fiber, without any large-mode-area Yb-doped photonic crystal fiber, makes the system compact and reliable by the simple fusion operation.
我们提出并展示了一种利用啁啾脉冲放大和自相似放大技术的高能量、超短脉冲持续时间、GHz脉冲串保偏光纤放大系统。这种混合光纤放大系统产生能量为22 μJ的200个脉冲的脉冲串，其脉冲串内脉冲重复频率为1.02 GHz，脉冲串间重复频率为1 MHz。放大压缩脉冲的中心波长为1065 nm，3 dB光谱带宽为65 nm。最佳压缩时的脉冲持续时间约为35 fs，这是迄今为止报道的任何重复频率处于GHz水平的多微焦耳级放大系统中最短的脉冲持续时间。同时，仅使用普通的双包层掺镱光纤作为增益光纤，无需任何大模面积掺镱光子晶体光纤，通过简单的熔接操作使系统紧凑且可靠。
