摘要
在超快光学瞬态相移的测量中,结合线性啁啾脉冲与频谱干涉技术,可以获得啁啾脉冲相移随频谱的变化规律。光脉冲经过光栅色散和透镜聚焦后,不同的频率成分以空间上的不同坐标展开。当两束脉冲频谱同时在空间上展开时,相同的频谱成分会产生干涉。基于傅里叶变换频谱干涉技术,从频谱干涉图中提取相移,并对其进行了数值模拟和实验研究。结果表明,通过对不同类型频域相移进行重构所得到的结果反映出了相移随脉冲频谱变化的特性。实验结果表明了这种重构算法是有效的,与模拟结果具有较好的一致性。
On the basis of the combination between the linearly chirped pulse and the spectral interferometry of two pulses, the relation of the phase-shifts of the chirped pulse and the spectrum is investigated. After grating dispersion and lens focus, the different frequency component of chirped pulse is spread in the form of space. When spectrurns of two chirped pulses are simul- taneous spread on the focal plane of lens, the spectral interferometry is generated between two pulses. Extracting spectral phase differences between two linear chirped pulse from the spectral interferogram is simulated based on Fourier Transform Spectral lnterferometry. The results show that reconstructed phase shifts of chirped pulse have characteristic of spectral change, and this reconstruction algorithm is effective. The experimental results are in accord with the numerical results.
出处
《光学技术》
CAS
CSCD
北大核心
2009年第6期847-850,共4页
Optical Technique
基金
高温高密度等离子体物理国防科技重点实验室项目(9140C6803020804)
关键词
光学测量
超快光学
频谱干涉
频域相移(频谱相移)
线性啁啾
optical measurement
ultrafast optics
spectral interferometry
spectral phase shifts
linear chirp
