Affiliations: [a] Department of Electronic Information and Electrical Engineering, Hefei University, Hefei, Anhui, China | [b] Department of Automation, University of Science and Technology of China, Hefei, Anhui, China
Correspondence:
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Corresponding author: Jian Ding, Department of Electronic Information and Electrical Engineering, Hefei University, Hefei, Anhui 230601, China. E-mail: [email protected].
Abstract: Femtosecond coherent anti-Stokes Raman scattering (CARS) generated by femtosecond laser with a large spectral range will inevitably face the problem that several adjacent vibration levels are excited simultaneously. In this paper, the internal control mechanism of open-loop coherent control methods is analyzed and summarized, and a design method forthe optimal control parameters to realize the selective excitation of adjacent energy levels is proposed. Finally, numerical simulations for selective excitation of adjacent energy levels are done to verify correctness and effectiveness of the method proposed, showing that the method proposed in this paper can optimize the ratio between the resonant peaks of two resonant energy levels to about 150–250.
Keywords: Femtosecond laser, mechanism analysis, selective excitation, design method of optimal control parameters, CARS
