White-light continuum can be induced by the interaction of intense femtosecond laser pulses with condensed materials. By using two orthogonal polarizers, a self-induced birefringence of continuum is observed when focusing femtosecond laser pulses into bulk fused silica. That is, the generated white-light continuum is synchronously modulated anisotropically while propagating in fused silica. Time-resolved detection confirms that self-induced birefringence of continuum shows a growth and saturation feature with time evolution. By adjusting laser energy, the transmitted intensity of continuum modulated by self-induced birefringence also varies correspondingly. Morphology analysis with time evolution indicates that it is the focused femtosecond laser pulses that induce anisotropic microstructures in bulk fused silica, and the anisotropic structures at the same time modulate the generated continuum.

中文翻译：

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聚焦飞秒激光脉冲与熔融石英相互作用产生的白光连续谱的自致双折射

白光连续谱可以通过强飞秒激光脉冲与凝聚材料的相互作用来诱导。通过使用两个正交偏振器，当将飞秒激光脉冲聚焦到块状熔融石英中时，观察到了连续介质的自致双折射。也就是说，产生的白光连续体在熔融石英中传播时被同步调制各向异性。时间分辨检测证实了连续介质的自致双折射随时间演化呈现增长和饱和特征。通过调节激光能量，自生双折射调制的连续谱的透射强度也相应变化。随时间演化的形态分析表明，聚焦的飞秒激光脉冲在块状熔融石英中诱导各向异性微结构，