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高非线性高双折射光子晶体光纤是超连续谱产生的最有效介质之一,因此本文选取V型光子晶体光纤作为研究对象.通过多极理论数值模拟的结果,确定V型光纤具有高双折射、高非线性等特性.通过实验手段,发现入射光中心波长和光纤的双折射效应对产生的超连续谱有很大的影响:当入射光波长处于光子晶体光纤大的反常色散区时,脉冲相对展得比较宽,长轴要比短轴方向的超连续谱更宽,频谱成分更加丰富.在同一波长下光偏振方向越接近45时,超连续谱谱宽范围越大.随着入射脉冲功率的增加,超连续谱展得越宽,但是当功率比较大时会达到功率饱和.
Highly nonlinear high birefringence photonic crystal fiber is one of the most effective mediums for supercontinuum generation, so V-type photonic crystal fiber is selected as the research object.Through numerical simulation of multipole theory, it is found that V-fiber has high birefringence , High nonlinearity, etc. By means of experiments, it is found that the central wavelength of incident light and the birefringence effect of the optical fiber have a great influence on the supercontinuum generated: when the incident light wavelength is in a large anomalous dispersion region of the photonic crystal fiber, the pulse Relatively broad and relatively long axis of the supercontinuum than the short axis direction of the broader spectral components more abundant at the same wavelength light polarization direction closer to 45 when the supercontinuum spectrum wide range with the incident pulse As the power increases, the supercontinuum exhibits a wider spread, but when the power is larger, the power is saturated.