Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan. t‑
Opt Lett. 2012 Oct 1;37(19):3972-4. doi: 10.1364/OL.37.003972.
We report on a passively mode-locked ytterbium-doped fiber oscillator pumped by polarization-combined diodes emitting at a wavelength of 915 nm instead of 976 nm. Stable mode-locked operation based on nonlinear polarization evolution generated a broad spectrum of 140 nm, spanning from 950 to 1090 nm. The output power was 16.3 mW at a repetition rate of 93.1 MHz. External compression using a pair of transmission gratings resulted in pulse durations as short as 21.6 fs, which is equivalent to 6.6 cycle optical pulses at a wavelength of around 1000 nm.
我们报告了一种基于非线性偏振演化产生的 140nm 宽光谱，从 950nm 到 1090nm 的被动锁模掺镱光纤振荡器，其采用的泵浦源为偏振组合二极管，发射波长为 915nm 而非 976nm。振荡器在重复频率为 93.1MHz 时，输出功率为 16.3mW。使用一对传输光栅进行外部压缩，可得到最短 21.6fs 的脉冲持续时间，相当于波长约为 1000nm 时的 6.6 个光学周期脉冲。
