Self-Referenced Measurement of Light Waves
Self-Referenced Measurement of Light Waves
复制标题
光波的自参考测量
DOI：
10.1002/lpor.201770043
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
and Takao Fuji
中科院分区：
文献类型：
--
作者：
Hideto Shirai;Yutaka Nomura;and Takao Fuji
人们知道光的波动特性已有100多年了。然而，在振荡周期以下的时间尺度上直接对瞬态光场进行采样仍然是非常困难的。人们自然认为，只有使用比振荡周期短的参考脉冲才能检测到场的振荡。在这封信中，展示了一个自参考光波测量的实验演示。利用具有载波包络相位测定能力的频率分辨光学门控，在没有任何参考脉冲的情况下，测量了21秒短周期脉冲的完整电场演化。同时记录了二次谐波产生的频率分辨光学门控谱图和二次谐波与自衍射信号之间的干涉图。用这种方法可以清晰地观察到少周期脉冲的相位控制光波。
The wave nature of light has been known for more than 100 years. However, it is still very difficult to directly sample an optical field transient on a time scale below the oscillation period. It has been naturally believed that the field oscillation can be detected only by using a reference pulse that has a shorter duration than the period of the oscillation. In this Letter, an experimental demonstration of a self‐referenced light wave measurement is shown. Frequency‐resolved optical gating capable of carrier‐envelope phase determination was used to measure the complete electric field evolution of a 21‐fs few‐cycle pulse without any reference pulses. A second harmonic generation frequency‐resolved optical gating spectrogram and an interferogram between second harmonic and self‐diffraction signals were simultaneously recorded. The phase‐controlled light waves of few‐cycle pulses were clearly observed by using this method.