Experimental Study on the Non-Resonant Signal of the CARS Process in Mixture
HOU Guo-hui, YIN Jun, JING Li-qing, LIU Wei, LIN Zi-yang, NIU Han-ben*
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Abstract：Coherent anti-Stokes Raman scattering is a nonlinear coherent four-wave mixing effect. But it is hard to quantitatively spectral analyze material components by detecting coherent signal. In the present paper, the resonant and non-resonant signals of mixture of ethanol and water with different volume ratio were experimentally studied with a single-frequency coherent anti-Stokes Raman scattering spectral method. By analyzing the experimental results, we found that the intensity of resonance signals at frequency 2 876 cm-1 is increased with the increase in volume ratio of ethanol and it is quadratic, but the intensity of non-resonant signal linearly increased with the volume ratio of ethanol. So the non-resonance intensity signal is linear with the concentration of the number of molecules N. Therefore, detecting the non-resonance signal will provide a way for the quantitative spectral analysis of the specific ingredients in the mixture.
Key words：Four-wave mixing;Coherent anti-stokes Raman scattering;Raman resonance;Non-resonance signal
侯国辉，尹 君，荆利青，刘 伟，林子扬，牛憨笨* . 混合溶液中CARS过程的非共振信号实验研究 [J]. 光谱学与光谱分析, 2013, 33(06): 1477-1480.
HOU Guo-hui, YIN Jun, JING Li-qing, LIU Wei, LIN Zi-yang, NIU Han-ben* . Experimental Study on the Non-Resonant Signal of the CARS Process in Mixture . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(06): 1477-1480.
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