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

• 作者: Hui Zhang Shian Zhang Xia Li Xianghua Feng Zhenrong Sun Zhongqiu Yu
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 物理学
• 关键词: COHERENT Anti-Stokes Raman Scattering Selective EXCITATION PULSE SHAPING
• 年，卷（期）: 2013,（2）
• 页码范围: 38-42
• 页数: 5页
• 分类号: O43

摘要

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.