采用钛宝石锁模飞秒激光器作为泵浦光源,利用1.8 μm纤芯的保偏光子晶体光纤的高非线性特性产生超连续谱,通过调节泵浦光源和光子晶体光纤之间的耦合,在可见光区,获得了中心波长分别在431 nm, 497 nm, 520 nm, 575 nm的mW量级的不同颜色的激光输出,并且测量输出的脉冲序列重复频率与泵浦光的一致,具有良好的稳定性.

The femtosecond pulses produced by Ti∶sapphire mode-locked laser were applied as the pump light,to generate the supercontinuum light source in the polarization-maintaining photonic crystal fiber with the average core size of 1.8 μm due to its high nonlinear properties.The multi-colors laser light source in the visible region with the central wavelengths of 431 nm, 497 nm, 520 nm, 575 nm, respectively, was achieved to be mW level with the adjusted coupling between the pump source and the photonic crystal fiber. And the output optical pulses were measured to be good stability with the same repetition rate of 250 kHz to the pump pulses.