Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Alexander Dreischuh"'
Autor:
Lyubomir Stoyanov, Maya Zhekova, Aleksander Stefanov, Ivan Stefanov, Gerhard G. Paulus, Alexander Dreischuh
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-13 (2020)
Abstract We demonstrate an alternative approach for generating zeroth- and first-order long range non-diffracting Gauss–Bessel beams (GBBs). Starting from a Gaussian beam, the key point is the creation of a bright ring-shaped beam with a large radi
Externí odkaz:
https://doaj.org/article/38dbc2c62419435abd271b8ca746c377
Autor:
Peter Hansinger, Philipp Töpfer, Nikolay Dimitrov, Daniel Adolph, Dominik Hoff, Tim Rathje, A Max Sayler, Alexander Dreischuh, Gerhard G Paulus
Publikováno v:
New Journal of Physics, Vol 19, Iss 2, p 023040 (2017)
We introduce a novel method for direct and accurate measurement of refractive index dispersion based on carrier-envelope phase detection of few-cycle laser pulses, exploiting the difference between phase and group velocity in a dispersive medium. In
Externí odkaz:
https://doaj.org/article/565392ca034a487c9bd17b1e82c4eed5
Publikováno v:
Optics Express. 31:13683
It is well-known that the wave of a freely propagating Gaussian beam experiences an additional π phase shift compared to a plane wave. This phase shift, known as the Gouy phase, has significant consequences in, e.g., nonlinear optics, since the nonl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0928f7d28f771935f27965ce38dfc2f9
https://doi.org/10.1364/oe.480761
https://doi.org/10.1364/oe.480761
Publikováno v:
Optical and quantum electronics 54(1), 34 (2022). doi:10.1007/s11082-021-03399-5
Optical and quantum electronics 54(1), 34 (2022). doi:10.1007/s11082-021-03399-5
Published by Springer Science + Business Media B.V, Dordrecht [u.a.]
Published by Springer Science + Business Media B.V, Dordrecht [u.a.]
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af7b62588fcd45e09fe6e905fdab85ce
Autor:
Alexander Dreischuh, I. L. Stefanov, Georgi Maleshkov, Maya Zhekova, Lyubomir Stoyanov, Gerhard G. Paulus
Publikováno v:
Optics Communications. 449:110-116
In this work, we present numerical simulations and experimental evidence for the creation of controllable multi-spot focal arrays composed of bright beams with flat phase profiles. The input phase structures sent to spatial light modulators were squa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39d184caa5bb6fc3376b568a61c3fab1
https://doi.org/10.1016/j.optcom.2019.05.051
https://doi.org/10.1016/j.optcom.2019.05.051
Autor:
Giuseppe Leo, F Fouad Karouta, Rocio Camacho-Morales, Chennupati Jagadish, Lyubomir Stoyanov, Andrei Komar, Davide Rocco, Alexander Dreischuh, Andrey E. Miroshnichenko, Valerio F. Gili, Zhonghua Ma, Mykhaylo Lysevych, Hark Hoe Tan, Nikolay Dimitrov, Costantino De Angelis, Lei Xu, Dragomir N. Neshev, Mohsen Rahmani
Publikováno v:
Advanced Photonics
Infrared imaging is a crucial technique in a multitude of applications, including night vision, autonomous vehicles navigation, optical tomography, and food quality control. Conventional infrared imaging technologies, however, require the use of mate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c45082415492c8a01f17c4ce58babf16
Publikováno v:
Optics communications 504, 127493 (2022). doi:10.1016/j.optcom.2021.127493
Among the existing techniques for measuring ultrashort pulse durations, the two classical second-order methods - interferometric and the background-free autocorrelation - are distinguished due to their simplicity and reliability. In this work we repo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc52c4a40e0adf6c331e6e5ed43ea69b
https://doi.org/10.1016/j.optcom.2021.127493
https://doi.org/10.1016/j.optcom.2021.127493
Autor:
Alexander Dreischuh, Ljiljana Janicijevic, I. L. Stefanov, Suzana Topuzoski, Lyubomir Stoyanov
Publikováno v:
Optics Communications. 428:206-215
By theoretical and experimental methods it is demonstrated how a beam whose amplitude profile is X-modulated in azimuthal direction, with central dark non-vortex core, can be transformed into an array of five-vortex spot patterns. This beam undergoes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58e163c6bfe4ef7016b189d1ec511925
https://doi.org/10.1016/j.optcom.2018.07.059
https://doi.org/10.1016/j.optcom.2018.07.059
Diffraction of a Gaussian beam by a four-sector binary grating with a shift between adjacent sectors
Publikováno v:
Optics Communications. 389:203-211
In this article as a diffractive optical element we consider a composed four-sector binary grating under Gaussian laser beam illumination. The angular sectors are bounded by the directions y = x and y = − x , and consist of parts of a binary rectil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::194e33b45905a575698fea2664e8e99e
https://doi.org/10.1016/j.optcom.2016.12.041
https://doi.org/10.1016/j.optcom.2016.12.041
Publikováno v:
International Conference on Quantum, Nonlinear, and Nanophotonics 2019 (ICQNN 2019).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::940a0e692ae777eba9e97281028b6970
https://doi.org/10.1117/12.2565519
https://doi.org/10.1117/12.2565519