Single-pulse phase-control interferometric coherent anti-Stokes Raman scattering spectroscopy
Single-pulse phase-control interferometric coherent anti-Stokes Raman scattering spectroscopy
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DOI：
10.1103/physreva.72.041803
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发表时间：
2005-10-01
影响因子：
2.9
通讯作者：
Leone, SR
中科院分区：
文献类型：
--
作者：
Lim, SH;Caster, AG;Leone, SR
在相干反斯托克斯拉曼散射（汽车）光谱实验中，通常只测量信号的振幅，而丢失了相位信息。与偏振和相位控制的脉冲整形技术，谐振和非谐振汽车信号之间的相对相位进行控制，光谱干涉测量进行没有干涉仪。无背景共振汽车光谱的真实的和虚部都是通过来自同一样品的共振和非共振信号之间的光谱干涉测量的。谐振信号通过与非谐振信号的零差混频作为本机振荡器而被显著放大，从而极大地提高了检测限。
In coherent anti-Stokes Raman scattering (CARS) spectroscopy experiments, usually the amplitude of the signal is measured and the phase information is lost. With a polarization- and phase-controlled pulse shaping technique, the relative phase between the resonant and nonresonant CARS signals is controlled, and spectral interferometry is performed without an interferometer. Both the real and imaginary parts of the background-free resonant CARS spectrum are measured via spectral interferometry between the resonant and nonresonant signals from the same sample. The resonant signal is amplified significantly by homodyne mixing with the nonresonant signal as a local oscillator, greatly improving the detection limit.