TY  - JOUR
AU  - Kovacević, Aleksander
AU  - Ristic-Djurović, Jasna L.
AU  - Lekić, Marina
AU  - Hadžić, Branka
AU  - Abudagel, Giuma Saleh Isa
AU  - Petričević, Slobodan
AU  - Mihailović, Pedja
AU  - Matović, Branko
AU  - Dramlić, Dragan
AU  - Brajović, Ljiljana
AU  - Romčević, Nebojsa
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/762
AB  - High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction (XRD) pattern, Verdet constant, magneto-optical property, and absorption coefficient. After irradiation, the transmission spectra values increased whereas anisotropy detected in the transmission spectra of unirradiated samples disappeared. The change of color caused by irradiation was noticeable to the naked eye. The XRD measurements confirmed structural changes induced by laser irradiation, i.e., the laser-beam-incident side of the sample became almost amorphous, whereas the side opposite to the incident can be indexed to the Bi12GeO20 compound. Irradiation caused increase of Raman spectra peaks with the exception of crystal peaks of type E, which disappeared. The femtosecond pulsed laser irradiation can be used to improve bismuth germanium oxide single crystal optical properties.
PB  - Elsevier Ltd
T2  - Materials Research Bulletin
T1  - Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties
EP  - 289
SP  - 284
VL  - 83
DO  - 10.1016/j.materresbull.2016.06.023
ER  - 

@article{
author = "Kovacević, Aleksander and Ristic-Djurović, Jasna L. and Lekić, Marina and Hadžić, Branka and Abudagel, Giuma Saleh Isa and Petričević, Slobodan and Mihailović, Pedja and Matović, Branko and Dramlić, Dragan and Brajović, Ljiljana and Romčević, Nebojsa",
year = "2016",
abstract = "High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction (XRD) pattern, Verdet constant, magneto-optical property, and absorption coefficient. After irradiation, the transmission spectra values increased whereas anisotropy detected in the transmission spectra of unirradiated samples disappeared. The change of color caused by irradiation was noticeable to the naked eye. The XRD measurements confirmed structural changes induced by laser irradiation, i.e., the laser-beam-incident side of the sample became almost amorphous, whereas the side opposite to the incident can be indexed to the Bi12GeO20 compound. Irradiation caused increase of Raman spectra peaks with the exception of crystal peaks of type E, which disappeared. The femtosecond pulsed laser irradiation can be used to improve bismuth germanium oxide single crystal optical properties.",
publisher = "Elsevier Ltd",
journal = "Materials Research Bulletin",
title = "Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties",
pages = "289-284",
volume = "83",
doi = "10.1016/j.materresbull.2016.06.023"
}

Kovacević, A., Ristic-Djurović, J. L., Lekić, M., Hadžić, B., Abudagel, G. S. I., Petričević, S., Mihailović, P., Matović, B., Dramlić, D., Brajović, L.,& Romčević, N.. (2016). Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties. in Materials Research Bulletin
Elsevier Ltd., 83, 284-289.
https://doi.org/10.1016/j.materresbull.2016.06.023

Kovacević A, Ristic-Djurović JL, Lekić M, Hadžić B, Abudagel GSI, Petričević S, Mihailović P, Matović B, Dramlić D, Brajović L, Romčević N. Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties. in Materials Research Bulletin. 2016;83:284-289.
doi:10.1016/j.materresbull.2016.06.023 .

Kovacević, Aleksander, Ristic-Djurović, Jasna L., Lekić, Marina, Hadžić, Branka, Abudagel, Giuma Saleh Isa, Petričević, Slobodan, Mihailović, Pedja, Matović, Branko, Dramlić, Dragan, Brajović, Ljiljana, Romčević, Nebojsa, "Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties" in Materials Research Bulletin, 83 (2016):284-289,
https://doi.org/10.1016/j.materresbull.2016.06.023 . .

TY  - JOUR
AU  - Knezević, Dragan
AU  - Dragović, Magdalena
AU  - Ibrahimović, Vedran
AU  - Srećković, Milesa
AU  - Kovacević, Aleksander
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/633
AB  - Remote tracking and recognition of various objects in defined space are complex multidisciplinary problems. Depending on selected scene being investigated (object size and dynamics, time needed for data processing and estimation), and on chosen optoelectronic system design, several solutions are available. For the fieldwork, the passive remote detection seems to be the most convenient. Economically reasonable approach with selected non-sophisticated modest equipment is proposed, evaluated and discussed. A numerical experiment is performed with own-developed algorithm in which unreal cases are automatically eliminated during the output vector data evaluation. Gaussian distribution method is implemented here. The average calculated times, resulted from simulation, were shorter than simulated values increased by 3 sigma.
PB  - National Institute of Science Communication and Information Resources (NISCAIR)
T2  - Indian Journal of Pure & Applied Physics
T1  - Numerical complexity of real-time tracking of objects in defined space by infrared optoelectronic devices
EP  - 464
IS  - 7
SP  - 457
VL  - 52
UR  - https://hdl.handle.net/21.15107/rcub_grafar_633
ER  - 

@article{
author = "Knezević, Dragan and Dragović, Magdalena and Ibrahimović, Vedran and Srećković, Milesa and Kovacević, Aleksander",
year = "2014",
abstract = "Remote tracking and recognition of various objects in defined space are complex multidisciplinary problems. Depending on selected scene being investigated (object size and dynamics, time needed for data processing and estimation), and on chosen optoelectronic system design, several solutions are available. For the fieldwork, the passive remote detection seems to be the most convenient. Economically reasonable approach with selected non-sophisticated modest equipment is proposed, evaluated and discussed. A numerical experiment is performed with own-developed algorithm in which unreal cases are automatically eliminated during the output vector data evaluation. Gaussian distribution method is implemented here. The average calculated times, resulted from simulation, were shorter than simulated values increased by 3 sigma.",
publisher = "National Institute of Science Communication and Information Resources (NISCAIR)",
journal = "Indian Journal of Pure & Applied Physics",
title = "Numerical complexity of real-time tracking of objects in defined space by infrared optoelectronic devices",
pages = "464-457",
number = "7",
volume = "52",
url = "https://hdl.handle.net/21.15107/rcub_grafar_633"
}

Knezević, D., Dragović, M., Ibrahimović, V., Srećković, M.,& Kovacević, A.. (2014). Numerical complexity of real-time tracking of objects in defined space by infrared optoelectronic devices. in Indian Journal of Pure & Applied Physics
National Institute of Science Communication and Information Resources (NISCAIR)., 52(7), 457-464.
https://hdl.handle.net/21.15107/rcub_grafar_633

Knezević D, Dragović M, Ibrahimović V, Srećković M, Kovacević A. Numerical complexity of real-time tracking of objects in defined space by infrared optoelectronic devices. in Indian Journal of Pure & Applied Physics. 2014;52(7):457-464.
https://hdl.handle.net/21.15107/rcub_grafar_633 .

Knezević, Dragan, Dragović, Magdalena, Ibrahimović, Vedran, Srećković, Milesa, Kovacević, Aleksander, "Numerical complexity of real-time tracking of objects in defined space by infrared optoelectronic devices" in Indian Journal of Pure & Applied Physics, 52, no. 7 (2014):457-464,
https://hdl.handle.net/21.15107/rcub_grafar_633 .