Zobrazeno 1 - 10
of 13
pro vyhledávání: '"D. V. Kiesewetter"'
Autor:
D. V. Kiesewetter, V. M. Barinov
Publikováno v:
2016 57th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON).
The results of experimental measurements of currents and voltages in the elements of cable power lines and communication lines at occurrence of single-phase short-circuit of power cable lines 110 and 220 kV are present. The effect of the short circui
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb652eec9c2a0290a7b802fdc2fa155d
https://doi.org/10.1109/rtucon.2016.7763120
https://doi.org/10.1109/rtucon.2016.7763120
Publikováno v:
2016 International Conference Laser Optics (LO).
The spectral correlation method for determining the height of the optical inhomogeneities and speckle-interferometer based on optical vortices for increasing sensitivity to longitudinal displacements of the scattering objects ares presented.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31657438354e04ce239af1c04c25ad35
https://doi.org/10.1109/lo.2016.7549818
https://doi.org/10.1109/lo.2016.7549818
Autor:
V. I. Malyugin, D. V. Kiesewetter
Publikováno v:
Technical Physics. 54:253-258
An optical method that makes it possible to measure the size and velocity of particles in flows and mixtures independently and simultaneously is considered. Measurements are taken by analyzing a moving diffraction pattern using a multielement photode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cdf717d5798796d032ff1863c92c431
https://doi.org/10.1134/s1063784209020157
https://doi.org/10.1134/s1063784209020157
Autor:
D V Kiesewetter
Publikováno v:
Quantum Electronics. 38:172-180
The formation of optical vortices in optical fibres is studied. Speckle patterns of optical fibres produced due to the interference of guided modes and optical vortices are simulated. The spatial statistical characteristics of speckle structures are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fec56c2db8a6105bafebe0e866d3f7c
https://doi.org/10.1070/qe2008v038n02abeh013581
https://doi.org/10.1070/qe2008v038n02abeh013581
Autor:
D. V. Kiesewetter
Publikováno v:
Radiophysics and Quantum Electronics. 50:388-401
We obtain asymptotic expressions for the eigenvalue difference of the waveguide modes of an optical fiber with step-index profile. The estimation of accuracy of the formulas is presented. Relationship between the indices of the modes that form linear
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d45d9a3a6cce1c750e7b5858b57b77f3
https://doi.org/10.1007/s11141-007-0036-6
https://doi.org/10.1007/s11141-007-0036-6
Autor:
D. V. Kiesewetter
Publikováno v:
Radiophysics and Quantum Electronics. 48:614-622
We obtain an asymptotic expression for calculation of radiation fields of the waveguide modes of a multimode fiber with a step-like profile of the refractive index at high normalized frequencies. The distribution of intensity of the output radiation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5908c770c48c4a15a35e2429d4678839
https://doi.org/10.1007/s11141-005-0106-6
https://doi.org/10.1007/s11141-005-0106-6
Autor:
D. V. Kiesewetter, V. I. Malyugin
Publikováno v:
Optics and Spectroscopy. 97:822-825
We consider a simple model allowing description of the spectral-polarization characteristics of optical fibers with local defects that result in energy exchange between modes with different polarizations. An experimental study was carried out that co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc3345e64b5f2f4d81403dbe29b15aef
https://doi.org/10.1134/1.1828635
https://doi.org/10.1134/1.1828635
Autor:
D. V. Kiesewetter
Publikováno v:
Radiophysics and Quantum Electronics. 46:204-210
Based on the approximations for the cylindrical-function ratios in the characteristic equation, we obtain asymptotic formulas for the eigenvalues of hybrid modes. The obtained expressions allow one to take into account variations in any waveguide par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8c68fd18c4e067758674c769f5cd2d4
https://doi.org/10.1023/a:1024424402516
https://doi.org/10.1023/a:1024424402516
Autor:
V. I. Malyugin, D. V. Kiesewetter
Publikováno v:
Technical Physics. 47:1145-1151
The effect of optical nonuniformities on the end of a fiber on optical radiation input is analyzed. Simple relationships for angular characteristics and input efficiency are derived. The analytic expressions are compared with experimental data.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31b0585df341daf140a827759ad8d4d1
https://doi.org/10.1134/1.1508080
https://doi.org/10.1134/1.1508080
Publikováno v:
Technical Physics Letters. 34:754-756
A spectral-correlation diagnostic method has been used for determining the linear dimensions of inhomogeneities with diffuse scattering surfaces in optical media. Experimental data are in good agreement with the results of numerical simulations and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05f194d06c0b8ba334d1e7ef9ae654d2
https://doi.org/10.1134/s1063785008090101
https://doi.org/10.1134/s1063785008090101