14 May 2010 Radiation of difference frequencies at optical rectification of spatially limited femtosecond laser pulse in the periodically poled GaAs crystal
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Abstract
The influence of spatial limitation femtosecond laser pulse as both on generation efficiency of difference frequency radiation by an optical rectification in periodically-poled GaAs crystal, and on a space-time profile of generated radiation in near and far zones is investigated. The difference frequency radiation features generated by spatially-limited femtosecond laser pulse with Gaussian spatial profile of intensity and the amplitude front in periodically-poled GaAs crystal are considered. As a result of Fresnel transformation application, an expression for the frequency-angular spectrum and the spectral density of difference frequency radiation in the far field is obtained. It is shown that generating the difference frequency radiation via optical rectification of spatially-limited femtosecond laser pulse in cross-section distribution of difference frequency radiation near field a certain coordinate corresponds to the appropriate spectral component.
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A. S. Martirosyan, D. L. Hovhannisyan, V. O. Chaltikyan, G. D. Hovhannisyan, "Radiation of difference frequencies at optical rectification of spatially limited femtosecond laser pulse in the periodically poled GaAs crystal", Proc. SPIE 7717, Optical Modelling and Design, 77170R (14 May 2010); doi: 10.1117/12.852578; https://doi.org/10.1117/12.852578
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