Spectral modifications of femtosecond laser pulses induced by high-efficiency optical rectification

Andrey G. Stepanov; Sergey V. Chekalin

doi:10.1117/12.751848

27 July 2007 Spectral modifications of femtosecond laser pulses induced by high-efficiency optical rectification

Andrey G. Stepanov, Sergey V. Chekalin

Proceedings Volume 6729, ICONO 2007: Coherent and Nonlinear Optical Phenomena; 672909 (2007) https://doi.org/10.1117/12.751848
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus

Abstract

We report experimental observations of the spectral modifications of ultrashort laser pulses caused by the generation of terahertz (THz) radiation via phase-matched optical rectification in LiNbO₃. The measured red shift and narrowing of the laser pulse spectra is in a good agreement with the consideration of the THz generation processes in terms of difference frequency mixing. Moreover, we propose and demonstrate a new method for evaluating the absolute energy of the THz pulse generated via high-efficiency optical rectification. The method is based on analyzing the laser pulse spectral modifications. Abilities to obtain >100% optical-to-THz quantum conversion efficiency are discussed.

Citation Download Citation

Andrey G. Stepanov and Sergey V. Chekalin "Spectral modifications of femtosecond laser pulses induced by high-efficiency optical rectification", Proc. SPIE 6729, ICONO 2007: Coherent and Nonlinear Optical Phenomena, 672909 (27 July 2007); https://doi.org/10.1117/12.751848

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