Chinese Optics Letters, 2019, 17 (8): 081902, Published Online: Jul. 19, 2019  

Interactive length of fundamental wave and second harmonic generated on the surface of anomalous dispersion medium Download: 570次

Author Affiliations
1 Institute of Super-Microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China
2 Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China
Abstract
In this Letter, a new method is presented to calculate the interactive length between the fundamental wave and second harmonic generation (SHG) for the configuration of total internal reflection on the inner surface of a nonlinear crystal. Three independent experiments are designed to measure the bandwidths of this second harmonic wave. The theoretical expression of the intensity of SHG is obtained through a nonlinear coupled wave equation. The interactive length of this phase-matched SHG can be calculated mathematically by utilizing the measured bandwidths and the intensity equation. There is no existing method to obtain the interactive length either from theoretical calculations or by experimental measurement. This method can be applied to estimate the extremely short interactive volume in nonlinear processes.

Xiaojing Wang, Huaijin Ren, Gang Wang, Jun He. Interactive length of fundamental wave and second harmonic generated on the surface of anomalous dispersion medium[J]. Chinese Optics Letters, 2019, 17(8): 081902.

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