TITLE:
Selective Excitation of Two-pulse Femtosecond Coherent Anti-Stokes Raman Scattering in a Mixture
AUTHORS:
Hui Zhang, Xianghua Feng, Zhongqiu Yu, Xia Li, Shian Zhang, Zhenrong Sun
KEYWORDS:
Coherent Anti-Stokes Raman Scattering; Selective Excitation; Pulse Shaping
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.2B,
July
18,
2013
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.