Xu Feng, Yuan Jinhui, Mei Chao, Yan Binbin, Zhou Xian, Wu Qiang, Wang Kuiru, Sang Xinzhu, Yu Chongxiu, Farrell Gerald
Appl Opt. 2019 Feb 20;58(6):1386-1392. doi: 10.1364/AO.58.001386.
In this paper, we design a polarization-maintaining CS-core photonic crystal fiber (PM-CCPCF). The two air holes in the x direction are infiltrated with CHOH in order to introduce birefringence. By optimizing the structure parameters of the PM-CCPCF, it is demonstrated that the x-polarization fundamental mode has an all-normal dispersion profile and the corresponding y-polarization fundamental mode has an anomalous dispersion profile for a pump wavelength of 1.76 μm. Then, we investigate the supercontinuum (SC) generations when different fiber lengths, pump peak powers, and pump pulse widths are chosen, respectively. Simulation results show that for the x-polarization and y-polarization fundamental modes, highly coherent SCs can be generated by appropriately choosing the fiber length and pump pulse parameters. Finally, nonlinear propagation dynamics are analysed when the optimized fiber length and pump pulse parameters are used. The bandwidth of the SCs generated for the x-polarization and y-polarization fundamental modes can be up to 0.82 and 1.26 octave, respectively.
在本文中，我们设计了一种保偏CS型芯光子晶体光纤（PM-CCPCF）。沿x方向的两个空气孔用CHOH浸润，以引入双折射。通过优化PM-CCPCF的结构参数，结果表明，对于1.76μm的泵浦波长，x偏振基模具有全正色散分布，相应的y偏振基模具有反常色散分布。然后，我们分别研究了在选择不同光纤长度、泵浦峰值功率和泵浦脉冲宽度时的超连续谱（SC）产生情况。仿真结果表明，对于x偏振和y偏振基模，通过适当选择光纤长度和泵浦脉冲参数，可以产生高相干的SC。最后，在使用优化后的光纤长度和泵浦脉冲参数时，分析了非线性传输动力学。为x偏振和y偏振基模产生的SC带宽分别可达0.82和1.26倍频程。
