New possibilities for measuring a pulse shape or a laser-radiation beam profile

Трофимов В.А., Варенцова С.А. Новые возможности для измерений формы импульса или профиля пучка лазерного излучения // Оптический журнал. 2008. Т. 75. № 6. С. 65–70.

Trofimov V.A., Varentsova S.A. New possibilities for measuring a pulse shape or a laser-radiation beam profile [in Russian] // Opticheskii Zhurnal. 2008. V. 75. № 6. P. 65–70.

V. A. Trofimov and S. A. Varentsova, "New possibilities for measuring a pulse shape or a laser-radiation beam profile," Journal of Optical Technology. 75 (6), 396-400 (2008). https://doi.org/10.1364/JOT.75.000396

This paper proposes a new method of reconstructing a pulse shape and a laser-beam profile, based on the use of integral measurements of the laser- radiation energy. The algorithm's workability and efficiency is demonstrated in the one-dimensional case, using the reconstruction of the response of an L-cystine molecule under the action of a short-period terahertz pulse as an example. For a spatially two-dimensional region, the proposed method makes it possible to obtain high-accuracy reconstruction of model beam profiles. A similar reconstruction of the beam profile based on optical tomography methods is substantially worse in the quality of the obtained laser-beam profile.