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利用亚纳焦量级、脉冲宽度为100fs的激光脉冲在双折射光子晶体光纤中获得了450—1050nm的超连续光谱,且超连续光谱具有明显的分立峰状结构.分析了光谱中分立峰状结构产生的物理机制,抽运光波长处于接近零色散波长的反常色散区,形成高阶光孤子,由于高阶非线性和高阶色散的影响,高阶孤子分裂成多个基孤子,使初始光谱上演化出红移的光孤子成分和蓝移的色散波成分.理论模拟了飞秒激光脉冲在光纤中的色散特性和传输特性,较好地解释了实验结果.
In the birefringent photonic crystal fiber, a superconducting spectrum of 450-1050 nm was obtained with a sub-nanogold laser pulse with a pulse width of 100 fs and the supercontinuum was obviously separated by a peak shape. Structure of the physical mechanism of pumping light wavelength near the zero dispersion wavelength of the anomalous dispersion region, the formation of high-order optical soliton, due to the high-order nonlinear and high dispersion, the higher-order solitons split into multiple base solitons, the initial spectrum staged The components of the redshifted soliton and the components of the blue-shifted dispersive wave are generated.The theoretical simulation of the dispersion and transmission characteristics of the femtosecond laser pulse in the optical fiber provides a good explanation of the experimental results.