Selective Excitation of Two-pulse Femtosecond Coherent Anti-Stokes Raman Scattering in a Mixture

Hui Zhang, Xianghua Feng, Zhongqiu Yu, Xia Li, Shian Zhang, Zhenrong Sun

Institute of Science, PLA Information Engineering University, Zhengzhou, China.
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China.

DOI: 10.4236/opj.2013.32B009                

Abstract

In this paper, we experimentally study the selective excitation of two-pulse femtosecond coherent anti-Stokes Raman scattering (CARS) in a mixture of dibromomethane (CH₂Br₂) and chloroform (CHCl₃) by adaptive pulse shaping based on genetic algorithm. Second harmonic generation frequency-resolved optical gating (SHG-FROG) traces indicate that the spectral amplitude and phase of the optimal pulse are both modulated. Finally, we discuss the physical mechanism for the selective excitation of femtosecond CARS based on the retrieved information from SHG-FROG traces.

Keywords

Coherent Anti-Stokes Raman Scattering; Selective Excitation; Pulse Shaping

Conflicts of Interest

The authors declare no conflicts of interest.

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