Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratings
An analytical expression for the focal intensity of a laser pulse was obtained for an asymmetric out-of-plane compressor with gratings of arbitrary surface shape. The focal intensity is most strongly affected by the linear angular chirp caused by the spatial shift of different frequencies on the sec...
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Cambridge University Press
2024-01-01
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| Series: | High Power Laser Science and Engineering |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S2095471924000586/type/journal_article |
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| author | Efim Khazanov |
| author_facet | Efim Khazanov |
| author_sort | Efim Khazanov |
| collection | DOAJ |
| description | An analytical expression for the focal intensity of a laser pulse was obtained for an asymmetric out-of-plane compressor with gratings of arbitrary surface shape. The focal intensity is most strongly affected by the linear angular chirp caused by the spatial shift of different frequencies on the second and third gratings. The chirp can be eliminated by simply rotating the fourth grating by an optimal angle, which significantly reduces the requirements for the grating quality. It is shown that the decrease in the focal intensity depends on the product of the grating surface root mean square and pulse spectrum bandwidth. With low-quality gratings, spectrum narrowing would not reduce focal intensity; contrariwise, it may even slightly increase it. |
| format | Article |
| id | doaj-art-a3737f0bd8eb44d6b5bb66624d7b1538 |
| institution | Kabale University |
| issn | 2095-4719 2052-3289 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | High Power Laser Science and Engineering |
| spelling | doaj-art-a3737f0bd8eb44d6b5bb66624d7b15382025-01-16T21:52:23ZengCambridge University PressHigh Power Laser Science and Engineering2095-47192052-32892024-01-011210.1017/hpl.2024.58Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratingsEfim Khazanov0https://orcid.org/0000-0001-5641-8025Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Niznij Novgorod, RussiaAn analytical expression for the focal intensity of a laser pulse was obtained for an asymmetric out-of-plane compressor with gratings of arbitrary surface shape. The focal intensity is most strongly affected by the linear angular chirp caused by the spatial shift of different frequencies on the second and third gratings. The chirp can be eliminated by simply rotating the fourth grating by an optimal angle, which significantly reduces the requirements for the grating quality. It is shown that the decrease in the focal intensity depends on the product of the grating surface root mean square and pulse spectrum bandwidth. With low-quality gratings, spectrum narrowing would not reduce focal intensity; contrariwise, it may even slightly increase it.https://www.cambridge.org/core/product/identifier/S2095471924000586/type/journal_articlefour-grating compressorgrating surface profilepetawatt lasersspace–time coupling |
| spellingShingle | Efim Khazanov Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratings High Power Laser Science and Engineering four-grating compressor grating surface profile petawatt lasers space–time coupling |
| title | Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratings |
| title_full | Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratings |
| title_fullStr | Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratings |
| title_full_unstemmed | Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratings |
| title_short | Dependence of the focal intensity of a femtosecond laser pulse on the non-flatness of compressor diffraction gratings |
| title_sort | dependence of the focal intensity of a femtosecond laser pulse on the non flatness of compressor diffraction gratings |
| topic | four-grating compressor grating surface profile petawatt lasers space–time coupling |
| url | https://www.cambridge.org/core/product/identifier/S2095471924000586/type/journal_article |
| work_keys_str_mv | AT efimkhazanov dependenceofthefocalintensityofafemtosecondlaserpulseonthenonflatnessofcompressordiffractiongratings |