Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Technical Science of Ministry of Education, College of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
Opt Lett. 2013 Apr 15;38(8):1292-4. doi: 10.1364/OL.38.001292.
We demonstrate a dispersion-mapped Yb-fiber laser with enhanced intracavity spectral breathing. A staged filtering by dissipation through a 30 nm bandpass filter and nonlinear spectral compression results in a transform-limited narrow bandwidth seed pulse for the amplifier fiber. The pulse evolves in the active fiber without gain bandwidth limitation. Further spectral scaling is achieved by single mode fiber. Simulation predicts an overall spectral breathing ratio of as high as 40. Pulse duration of sub-25 fs with 2.3 nJ pulse energy was achieved in experiment.
我们展示了一种具有增强腔内光谱呼吸的色散映射 Yb 光纤激光器。通过通过 30nm 带通滤波器的耗散进行分阶段过滤，以及非线性光谱压缩，导致放大器光纤的变换限制的窄带宽种子脉冲。该脉冲在有源光纤中演变而没有增益带宽限制。通过单模光纤进一步实现光谱缩放。模拟预测整体光谱呼吸比高达 40。实验中实现了脉冲持续时间为 25fs 以下，脉冲能量为 2.3nJ。
