采用钛宝石光参量放大器作为泵浦源,利用其输出波长可调谐性,研究了不同泵浦波长对光子晶体光纤中产生超连续谱的影响,结果表明光子晶体光纤中零色散点处的群时延和1.4μm处的OH根离子的吸收对超连续谱的平坦度影响很大,并且泵浦波长离光纤的零色散点越远,产生的超连续谱平坦度越差,甚至在可见光区产生的各个频率峰还只是分离的,没有形成超连续谱.当泵浦波长为1.2μm时,获得了带宽为300 nm～1350 nm的超连续谱,谱宽超过了两个倍频程.

The Ti:sapphire Optical Parametric Amplifier was applied as the pump source with the output wavelength tuning.Supercontinuum generation in photonic crystal fibers was researched with different pump wavelengths.It was concluded that the SC generation was depended on the pump wavelength,and the difference group velocities in the two sides of the zero dispersive wavelength of the PCF and the OH absorption at about 1.4 μm in the PCF affected the flatness of the generated supercontinuum.When the pump wavelength lied further away from the zero dispersive wavelength,the flatness was reduced,even in the visible region the blue-shift peaks were separated and didnot come into being supercontinuum.Supercontinuum with a broad bandwidth of 300 nm to 1350 nm was generated with the pump wavelength of 1.2 μm,and the generated spectral bandwidth was beyond two octaves.