Institut FEMTO-ST, Département d’Optique, UMR 6174 CNRS-Université de Franche-Comté, Besançon 25000, France.
Opt Lett. 2013 May 1;38(9):1570-2. doi: 10.1364/OL.38.001570.
We report the experimental observation of self-induced modulation instability (MI) in a Brillouin fiber laser made with a solid-core photonic crystal fiber (PCF) with strong anomalous dispersion. We identify this MI as the result of parametric amplification of optical sidebands generated by guided acoustic modes within the core of the PCF. It is further shown that MI leads to passive harmonic mode locking and to the generation of a picosecond pulse train at a repetition rate of 1.15 GHz which matches the acoustic frequency of the fundamental acoustic mode of the PCF.
我们报告了在具有强反常色散的固体芯光子晶体光纤（PCF）中制作的布里渊光纤激光器中自诱导调制不稳定性（MI）的实验观察结果。我们将这种 MI 鉴定为 PCF 芯部中的导声模产生的光边带的参量放大的结果。进一步表明，MI 导致被动谐波锁模，并在重复率为 1.15GHz 处产生皮秒脉冲串，该重复率与 PCF 的基本声模的声频率匹配。
