Mitigating cross‐phase modulation artifacts in femtosecond stimulated Raman scattering
Mitigating cross‐phase modulation artifacts in femtosecond stimulated Raman scattering
复制标题
减轻飞秒受激拉曼散射中的交叉相位调制伪影
DOI：
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发表时间：
2020
影响因子：
2.5
通讯作者：
C. Fallnich
中科院分区：
文献类型：
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作者：
T. Würthwein;Niklas M. Lüpken;N. Irwin;C. Fallnich
与自发拉曼散射相比，相干拉曼散射技术，如飞秒受激拉曼散射（FSRS），在许多应用中显示出优势。除了增强的信号强度之外，FSRS没有非共振背景，但受到交叉相位调制（XPM）的影响。FSRS中产生的伪影与高脉冲强度（GW/cm 2 -制度）和超短脉冲（<2 ps）相关，这两者对于超分辨率实验都是必要的。由于脉冲持续时间是XPM以及FSRS的关键参数，因此我们提出了一种设置，在该设置中，我们在相关范围（0.5 - 3 ps）内调整脉冲持续时间，以研究XPM对光谱的影响。此外，我们改变了峰值强度，相互作用脉冲之间的时间重叠，以及样品的非线性折射率系数n2，表明所有这些量之间的权衡使测量不受影响的FSRS光谱成为可能
In contrast to spontaneous Raman scattering, coherent Raman scattering tech-niques, such as femtosecond stimulated Raman scattering (FSRS), show advantages for many applications. Besides an enhanced signal strength, FSRS is free of a nonresonant background but is affected by cross-phase modulation (XPM). The resulting artifacts in FSRS become relevant for high pulse intensities (GW/cm 2 -regime) and ultrashort pulses (<2 ps), both necessary for super-resolution experiments. As the pulse duration is a crucial parameter for XPM as well as for FSRS, we present a setup in which we adjust the pulse duration across the relevant range (0.5 – 3 ps), in order to investigate the XPM influence on the spectra. Furthermore, we vary the peak intensity, the temporal overlap between the interacting pulses, and the nonlinear refractive index coefficient n 2 of the sample, showing that a trade-off between all these quantities enables the measurement of unaffected FSRS spectra
影响因子：
7.4
作者：
Graefe, Christian T.;Punihaole, David;Frontiera, Renee R.
通讯作者：
Frontiera, Renee R.