Zajnulina Marina, Böhm Michael
Opt Lett. 2024 Jul 15;49(14):3894-3897. doi: 10.1364/OL.530216.
The temporal Talbot effect refers to the periodic self-imaging of pulse trains in optical fibers. The connection between the linear and nonlinear temporal Talbot effect is still not fully understood. To address this challenge, we use the soliton radiation beat analysis (SRBA) and numerically investigate the evolution of a phase-modulated continuous-wave laser input in a passive single-mode fiber. We identify three input-power-dependent regimes and their Talbot carpets: the quasi-linear regime for low input powers, the intermediate one, and separated Talbot solitons for higher powers. We show that the intermediate regime hosts soliton crystals rather than rogue waves, as reported in the literature. The Talbot soliton beating can be used for pulse repetition-rate multiplication in the nonlinear regime. We also show two types of solitons involved: some encoded in the whole frequency comb, and the individual solitons carried only by particular comb lines.
时间塔尔博特效应是指光纤中脉冲序列的周期性自成像。线性和非线性时间塔尔博特效应之间的联系仍未完全理解。为应对这一挑战，我们使用孤子辐射拍频分析（SRBA），并对无源单模光纤中相位调制连续波激光输入的演化进行了数值研究。我们确定了三种与输入功率相关的 regime 及其塔尔博特地毯：低输入功率下的准线性 regime、中间 regime 以及高功率下的分离塔尔博特孤子。我们表明，中间 regime 中存在孤子晶体而非文献中报道的 rogue 波。塔尔博特孤子拍频可用于非线性 regime 中的脉冲重复率倍增。我们还展示了所涉及的两种类型的孤子：一些编码在整个频率梳中，而单个孤子仅由特定的梳状线携带。
