We consider the possibility of generating the second and fourth optical harmonics of laser pulses having a central wavelength of 1030 nm with retaining the three-dimensional quasi-ellipsoidal intensity distribution. The presented results of numerical simulation confirm that angular chirping allows one to retain the three-dimensional structure of the intensity distribution and enhance energy conversion. The proposed approach was tested experimentally using non-profiled laser beams. Energy conversion efficiency of 53% and 21% was achieved in the generation of the second and fourth harmonics, respectively.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 61, No. 6, pp. 516–527, June 2018.
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Mironov, S.Y., Gacheva, E.I., Potemkin, A.K. et al. Generation of the Second and Fourth Harmonics with Retaining the Three-Dimensional Quasi-Ellipsoidal Distribution of the Laser Pulse Intensity for a Photoinjector. Radiophys Quantum El 61, 456–466 (2018). https://doi.org/10.1007/s11141-018-9907-2
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DOI: https://doi.org/10.1007/s11141-018-9907-2