Li Ti-Jian, Sun He, Liu Meng, Luo Ai-Ping, Xu Wen-Cheng, Luo Zhi-Chao
Opt Lett. 2024 Jan 1;49(1):57-60. doi: 10.1364/OL.509507.
We develop an all polarization-maintaining (PM) 920 nm Nd-doped fiber amplifier delivering a train of pulses with ∼0.53 W average power and sub-50 fs duration. The sub-50 fs pulse benefits from the pre-chirping management method that allows for over 60 nm broadening spectrum without pulse breaking in the amplification stage. By virtue of the short pulse duration, the pulse peak power can reach to ∼0.31 MW in spite of the moderate average power. These results represent a key step in developing high-peak-power pulse Nd-doped fiber laser systems at 920 nm, which will find important applications in fields such as biomedical imaging, ultrafast optical spectroscopy, and excitation of quantum-dot single photon sources.
我们研制了一种全保偏（PM）920纳米掺钕光纤放大器，它能输出一系列脉冲，平均功率约为0.53瓦，脉宽小于50飞秒。脉宽小于50飞秒的脉冲得益于预啁啾管理方法，该方法能在放大阶段实现超过60纳米的光谱展宽且脉冲不分裂。由于脉冲持续时间短，尽管平均功率适中，脉冲峰值功率仍可达到约0.31兆瓦。这些结果代表了在920纳米波长开发高峰值功率脉冲掺钕光纤激光系统的关键一步，该系统将在生物医学成像、超快光学光谱学以及量子点单光子源激发等领域找到重要应用。
