报道了利用自行拉制的具有大空气比、小纤芯的非均匀微结构光纤同纳焦耳量级的飞秒激光脉冲相互作用的试验研究。大空气比所带来的大折射率差能将传输的光场强烈地局域在纤芯中,大大增强了非线性效应,所以在1～2 cm的传输距离内,便有白光产生,传输60 cm后,输入的24 nm,35 fs飞秒脉冲就展宽成超过一个倍频程(Octave)(390～1050 nm)的超连续光谱,并且由于其包层具有非均匀分布的大小不等的空气孔,从而在传输过程中观察到由这种结构形成的非完全光子带隙影响下,侧向光泄露呈现颜色变化的新现象。

A random distributed microstructure fiber is demonstrated, and supercontinuum light with a spectrum more than one octave (390～1050 nm) was generated in 60 cm microstructure fiber by the femtosecond pulse laser with a duration of 35 fs and a energy of several nanojoules per pulse. The large refractive-index step between silica and air allows light to be concentrated into a very small area and resulting in those enhanced nonlinear effects. Some new phenomena is observed when the supercontinuum light transmits in this fiber due to its incomplete photonic band gap, such as the color variation along the fiber.