Coherent anti-Stokes Raman microspectroscopy using spectral focusing with glass dispersion
Coherent anti-Stokes Raman microspectroscopy using spectral focusing with glass dispersion
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DOI：
10.1063/1.3028346
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发表时间：
2008-11-17
影响因子：
4
通讯作者：
Borri, Paola
中科院分区：
文献类型：
--
作者：
Rocha-Mendoza, Israel;Langbein, Wolfgang;Borri, Paola
我们实验证明，相干反斯托克斯拉曼显微光谱与高光谱分辨率实现飞秒激光脉冲啁啾几皮秒的玻璃元件的已知群速度色散没有显着的强度损失。通过简单地选择玻璃的长度，斯托克斯和泵浦脉冲的啁啾被定制以获得由啁啾脉冲持续时间的傅里叶极限给出的光谱分辨率。我们表明，啁啾脉冲的持续时间短于或相当于拉曼相干时间，最大信号发生后到达的斯托克斯脉冲，时间排序的效果，通过数值模拟证实了泵。
We demonstrate experimentally that coherent anti-Stokes Raman microspectroscopy with high spectral resolution is achieved using femtosecond laser pulses chirped up to a few picoseconds by glass elements of known group-velocity dispersion without significant intensity losses. By simply choosing the length of the glass, the chirp of Stokes and pump pulses is tailored to obtain a spectral resolution given by the Fourier limit of the chirped pulse duration. We show that for chirped pulse durations shorter than or comparable to the Raman coherence time, maximum signal occurs for a pump arriving after the Stokes pulse, a time-ordering effect confirmed by numerical simulations.