Open AccessTheoretical and experimental study on the multi-color broadband coherent anti-Stokes Raman scattering processes
Author(s) -
Jun Yin,
Ye Feng,
Hou Guo-Hui,
Runfu Liang,
Yu Tian,
Lin Zi-Yang,
Hanben Niu
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.073301
Subject(s) - supercontinuum , raman scattering , excitation , raman spectroscopy , spectroscopy , coherent anti stokes raman spectroscopy , broadband , broad band , optics , materials science , coherent spectroscopy , scattering , spectral line , optoelectronics , physics , wavelength , quantum mechanics , astronomy , photonic crystal fiber
In order to exactly distinguish and quantitatively analyze the different or unknown components in a mixture, the global molecular CARS spectra information should be obtained simultaneously with a broad-band coherent anti-Stokes Raman scattering (CARS) spectroscopy in supercontinuum. In a broad-band CARS spectroscopy, two-and three-color CARS processes are generated due to different functions of effective spectroscopic components in supercontinuum. Firstly, we theoretically analyzed the generation conditions of CARS signals and the relationships between their intensity and power of excitation lights in the two types of CARS process with the broad-band excitation. On this basis, the two types of CARS process are achieved with a home-built broad-band CARS spectroscopic system, respectively. Using the functional fitting analysis of the obtained CARS spectral signals of benzonitrile, the relationships between CARS signals and excitation lights are experimentally verified in two different kinds of CARS process. Further optimizations of broad-band time-resolved CARS spectroscopic and microscopic systems, for simultaneously obtaining the global CARS spectral signals of samples, can be achieved under the guidance of theoretical and experimental results.