光学学报, 2016, 36 (6): 0619001, 网络出版: 2016-05-25
正色散光学微腔中光场演化过程研究 下载: 510次
Spatiotemporal Evolution of the Light Field Inside the Microresonator with Normal Dispersion
非线性光学 微腔 Lugiato-Lefever方程 光场演化 nonlinear optics microresonator Lugiato-Lefever equation light field evolution
摘要
以微腔内光场演化的理论模型Lugiato-Lefeve方程为基础,分别讨论了连续光(CW)抽运和连续光与脉冲光混合抽运两种情况下,正色散微腔中光场的演化过程,以及各参数对光场分布的影响。理论分析结果表明,在CW抽运的情况下,微腔中有稳定的暗孤子存在,并且随着色散系数的增加,暗孤子的脉宽会增加,而失谐参量的增加会使暗孤子的形状发生变化。采用混合抽运可以在腔内形成脉冲形式的光场分布,弥补了单一CW抽运时在特定参数的正色散腔内难以产生亮孤子脉冲的不足。抽运脉冲的振幅过高,会导致腔内的脉冲发生分裂,微腔失谐参量的增加会导致脉冲展宽以及脉冲能量降低。理论分析结果对实现高质量的Kerr光频梳具有重要意义,能够帮助选择合适的微腔及抽运参数。
Abstract
Based on the Lugiato-Lefever equation, the spatiotemporal evolutions in microresonator are discussed respectively, which is pumped by the continuous wave (CW) light as well as the combination of CW light and periodical pulse train simultaneously, and the effect of each parameter on light field is studied. Simulation results indicate that the dark soliton can exist in the microresonator with CW pumped. The width of the dark soliton pulse increases with the dispersion coefficient. The shape of the dark soliton pulse is varied when the frequency detuning is increased. Meanwhile, in the normal dispersion regime, the pulses can form in the microresonator by the use of synthetical pumping manner. The drawback is compensated that the bright soliton pulse is difficult to be generated in the microresonator for single CW pumped of certain parameters configuration. Moreover, the high amplitude of the pump pulses leads to the pulse split, the pulse stretching and the loss of the pulse occur when the frequency detuning of the microresonator rises. Theoretical analysis results are significant for high-quality Kerr optical frequency comb and their practical applications, and they are helpful for selecting the proper microresonator and pump parameters.
徐昕, 胡晓鸿, 冯野, 刘元山, 王屹山, 魏儒义. 正色散光学微腔中光场演化过程研究[J]. 光学学报, 2016, 36(6): 0619001. Xu Xin, Hu Xiaohong, Feng Ye, Liu Yuanshan, Wang Yishan, Wei Ruyi. Spatiotemporal Evolution of the Light Field Inside the Microresonator with Normal Dispersion[J]. Acta Optica Sinica, 2016, 36(6): 0619001.