Zhao XingTao, Cheng Jirui, Xiong Qiang, Hua Lu, Jiang Guohui
Appl Opt. 2018 Jul 10;57(20):5623-5627. doi: 10.1364/AO.57.005623.
To study the four-wave mixing (FWM) effect and wavelength conversion in a hollow core bandgap photonic crystal fiber filled with Ar, we conducted an experiment using a femtosecond laser with the pulse width of 120 fs, a repetition rate of 76 MHz, and tunable central wavelength from 760 to 980 nm. It is observed that new spectra are generated in both sides of the pump at a special wavelength, which can exactly satisfy the phase matching conditions of FWM. Combining experimental results with theoretical analysis, we find that the experimental phenomenon is mainly caused by FWM, and some other nonlinear phase effects, such as self-phase modulation, stimulated Raman scattering, and the soliton effect, have also occurred in this nonlinear process.
为了研究填充氩气的空心带隙光子晶体光纤中的四波混频（FWM）效应和波长转换，我们使用了脉宽为120 fs、重复频率为76 MHz、中心波长在760至980 nm之间可调的飞秒激光进行了实验。观察到在泵浦光的特定波长两侧产生了新的光谱，这些光谱能够精确满足FWM的相位匹配条件。将实验结果与理论分析相结合，我们发现实验现象主要由FWM引起，并且在这个非线性过程中还发生了一些其他的非线性相位效应，如自相位调制、受激拉曼散射和孤子效应。
