论文标题
通过第二次谐波产生
Two-color flat-top solitonic pulses in $χ^{(2)}$ optical microresonators via second harmonic generation
论文作者
论文摘要
我们通过常规频率扫描方法以$χ^{（2）} $微孔子的数字研究了第二次谐波生成时相干频率梳的生成。 It was demonstrated for the first time that under particular conditions it is possible to generate two-color flat-top solitonic pulses, platicons, using pump amplitude modulation or controllable mode interaction approach, if the signs of the group velocity coefficients at pump frequency and its second harmonic are opposite but absolute values of these coefficients are rather close.据揭示，可以在线性微孔子共振的两侧观察到platicons（在正，以及负泵频频率分解）。对于有效的platicon激发，需要同时精确地匹配微孔子游离光谱范围和谐振特征频率。在数值上模拟了Platicon的生成过程，为不同的生成方法发现了激发条件和Platicon生成结构域，并研究了生成的platicons的性质以用于中等参数的不同组合。
We studied numerically the generation of the coherent frequency combs at second harmonic generation in $χ^{(2)}$ microresonators via conventional frequency scan method. It was demonstrated for the first time that under particular conditions it is possible to generate two-color flat-top solitonic pulses, platicons, using pump amplitude modulation or controllable mode interaction approach, if the signs of the group velocity coefficients at pump frequency and its second harmonic are opposite but absolute values of these coefficients are rather close. It was revealed that platicons may be observed on both sides of the linear microresonator resonance (at positive, as well as negative pump frequency detunings). For the efficient platicon excitation, one needs simultaneous accurate matching of both microresonator free spectral ranges and resonant eigenfrequencies. Platicon generation processes were simulated numerically, excitation conditions and platicon generation domains were found for different generation methods, and the properties of generated platicons were studied for the different combinations of the medium parameters.
