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采用波长可调光参量放大器作为泵浦源 ,对保偏光子晶体光纤的超连续谱的产生和非线性特性进行了实验研究 将光参量放大器产生的中心波长为 1.2 7μm ,脉宽约为 2 5 0fs ,重复频率为2 5 0kHz和单脉冲能量只有 92nJ的光脉冲耦合进 0 .2m长的保偏光子晶体光纤 ,实验中观察到了光谱展宽和非线性效应 ,在 1.3μm波长区域获得了谱宽为 83nm (1.2 4 86～ 1.3318μm)的超连续谱
The wavelength-adjustable optical parametric amplifier is used as a pump source to experimentally study the generation and nonlinearity of the supercontinuum of the polarization-maintaining photonic crystal fiber. The central wavelength of the optical parametric amplifier is 1.2 7μm and the pulse width is about 25 0fs, a repetition frequency of 250kHz and a pulse energy of only 92nJ were coupled into a 0.2m long polarization-maintaining photonic crystal fiber. Spectral broadening and nonlinear effects were observed in the experiment. Spectral width was obtained in the 1.3μm wavelength region Is a supercontinuum of 83 nm (1.2 4 86 ~ 1.3318 μm)