Wei Xiaoming, Xu Yiqing, Wong Kenneth K Y
Opt Lett. 2015 Jul 1;40(13):3005-8. doi: 10.1364/OL.40.003005.
We demonstrate a partially mode-locked pulse laser delivering ultra-wideband optical spectrum, i.e., 1000-1400 nm at 30 dB, from a simple all-fiber short cavity with all-normal dispersion. Examined by both real-time temporal and spectral analyzers, the partially mode-locked pulse exhibits double-scale noise-like characteristics-the fast L-shaped mode-locked pulse modulated by slow free-running Q-switched envelopes. Moreover, the statistical analysis as a function of its optical bandwidth shows that the spectral tuning does not compromise the temporal stability, but affects the pulsing periodicity. It is believed that the wide spectrum of knowledge obtained here would enrich the field of noise-like pulse, such as being beneficial to the rogue wave generation.
我们展示了一种部分锁模脉冲激光器，它能从一个具有全正色散的简单全光纤短腔中输出超宽带光谱，即在30dB时为1000 - 1400nm。通过实时时域和光谱分析仪检测，部分锁模脉冲呈现出双尺度类噪声特性——快速的L形锁模脉冲由缓慢的自由运转调Q包络调制。此外，作为其光学带宽函数的统计分析表明，光谱调谐不会损害时间稳定性，但会影响脉冲周期性。据信，在此获得的广泛知识将丰富类噪声脉冲领域，比如有利于 rogue 波的产生。
