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首页> 外文期刊>Optical fiber technology >Nonlinear performance of asymmetric coupler based on dual-core photonic crystal fiber: Towards sub-nanojoule solitonic ultrafast all-optical switching
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Nonlinear performance of asymmetric coupler based on dual-core photonic crystal fiber: Towards sub-nanojoule solitonic ultrafast all-optical switching

机译：基于双芯光子晶体光纤的非对称耦合器的非线性性能：朝亚纳米焦孤子超快全光切换

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摘要

We demonstrate ultrafast soliton-based nonlinear balancing of dual-core asymmetry in highly nonlinear photonic crystal fiber at sub-nanojoule pulse energy level. The effect of fiber asymmetry was studied experimentally by selective excitation and monitoring of individual fiber cores at different wavelengths between 1500 nm and 1800 nm. Higher energy transfer rate to non-excited core was observed in the case of fast core excitation due to nonlinear asymmetry balancing of temporal solitons, which was confirmed by the dedicated numerical simulations based on the coupled generalized nonlinear Schrodinger equations. Moreover, the simulation results correspond qualitatively with the experimentally acquired dependences of the output dual-core extinction ratio on excitation energy and wavelength. In the case of 1800 nm fast core excitation, narrow band spectral intensity switching between the output channels was registered with contrast of 23 dB. The switching was achieved by the change of the excitation pulse energy in sub-nanojoule region. The performed detailed analysis of the nonlinear balancing of dual-core asymmetry in solitonic propagation regime opens new perspectives for the development of ultrafast nonlinear all-optical switching devices.
机译：我们展示了在亚纳米焦耳脉冲能级下高度非线性光子晶体光纤中基于超快孤子的双核不对称非线性平衡。通过选择性激发和监测单个光纤纤芯在1500 nm至1800 nm之间的不同波长，实验研究了光纤不对称的影响。由于时间孤子的非线性不对称平衡，在快速堆芯激励的情况下，观察到了更高的能量传递到非受激堆芯，这一点已通过基于耦合广义非线性Schrodinger方程的专用数值模拟得到了证实。此外，仿真结果定性地对应于实验获得的输出双核消光比对激发能和波长的依赖性。在1800 nm快速磁芯激发的情况下，输出通道之间的窄带光谱强度切换记录为23 dB的对比度。通过改变亚纳米焦耳区域中的激发脉冲能量来实现切换。对孤子传播状态下双核不对称的非线性平衡进行的详细分析为超快非线性全光开关器件的发展开辟了新的前景。

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