56th MEETING OF THE SERBIAN CHEMICAL SOCIETY Book of Abstracts
(Serbian Chemical Society)
• 01 Apr 2024
Ristić, Milenko • Radulović, Niko • Dekić, Biljana • Ristić, Novica • Dekić, Vidoslav
During our previous work, we prepared a series of mixed azines with a coumarin moiety and
different benzaldehydes, and tested their acute toxicity and antioxidant activity. Since
heterocyclic compounds possess a broad range of biological activities, in the continuation
of our work, we designed, synthesized and fully spectrally characterized a series of new
mixed azines starting from 3-acetyl-4-hydroxycoumarin and different heteroaromatic
aldehydes. The synthesized compounds were evaluated f ...
55th Meeting of SCS, Book of Abstracts
(Serbian Chemical Society)
• 01 Apr 2024
Radulović, Niko • Ristić, Milenko • Mladenović, Marko • Ristić, Novica • Dekić, Vidoslav • Dekić, Biljana • Ranđelović, Vladimir
Detailed GC and GC-MS analysis of a diethyl ether washings of fresh flowers of Dianthus cruentus Griseb. (Caryophyllaceae) enabled the identification of 153 constituents. The major identified compounds were long-chain n-alkanes - pentacosane (5.0 %), heptacosane (19.5 %) and nonacosane (6.5 %). Detailed analyses, in combination with synthesis and chemical transformations (transesterification and synthesis of dimethyl disulfide adducts), led to the identification of a homologous series of n-, iso ...
Journal of Modern Optics
(Taylor & Francis)
• 28 Aug 2019
Savović, Svetislav • Djordjevich, Alexandar • Simović, Ana • Drljača, Branko
By solving the power flow equation, we investigate the influence of mode coupling on space division
multiplexing capability of three multimode step-index silica optical fibres with a different strengths
of mode coupling. Results show that mode coupling significantly limits the length of these fibres
at which the space division multiplexing can be realized with a minimal crosstalk between the
neighbour optical channels. This is most pronounced in silica optical fibres with the strongest mode ...
Laser Physics
(IOP Science)
• 07 Jan 2020
Drljača, Branko • Simović, Ana • Djordjevich, Alexandar • Savović, Svetislav
The bandwidth and steady-state loss of multimode W-type plastic-clad silica optical fibers are
investigated by solving the time-dependent power flow equation. The results show how the
bandwidth of W-type plastic-clad silica optical fibers can be enhanced by shifting from the red
to the infrared wavelength region for different intermediate layer widths and refractive indices
of the outer cladding. Such characterization of these fibers is consistent with their manifest
effectiveness in reduci ...
Laser Physics
(IOP Science)
• 11 May 2020
Savović, Svetislav • Djordjevich, Alexandar • Simović, Ana • Drljača, Branko
We propose an angular division multiplexing in new designed multicore plastic optical fiber
with seven cores arranged in a hexagonal array. The influence of mode coupling on two-channel
angular division multiplexing capability in each of seven cores is investigated by solving the
power flow equation. Our numerical results show that mode coupling significantly limits the
fiber length at which the angular division multiplexing can be realized in each of seven cores
with a minimal crosstalk be ...
Laser Physics
(IOP Science)
• 27 May 2020
Drljača, Branko • Simović, Ana • Djordjevich, Alexandar • Savović, Svetislav
Wavelength dependence of equilibrium mode distribution (EMD) and steady state distribution
(SSD) in W-type plastic optical fibers (POFs) is investigated in this paper for parametrically
varied width of the fiber’s intermediate optical layer and refractive index of the outer cladding.
We have shown that with increasing the wavelength EMD and SSD are achieved at shorter
W-type POF lengths. This is explained by the rise of the leaky mode losses with increasing
wavelength. This facilitates tail ...
Laser Physics
(IOP Science)
• 28 Jul 2020
Savović, Svetislav • Djordjevich, Alexandar • Simović, Ana • Drljača, Branko
We propose a spatial division multiplexing in a new designed multimode multicore graded index
plastic optical fiber with nine cores arranged in an octagonal array. The influence of mode
coupling on two-channel spatial division multiplexing capability in each of nine cores is
investigated by solving the power flow equation. Our numerical results show that mode coupling
significantly limits the fiber length at which the spatial division multiplexing can be realized in
each of nine cores with ...
Laser Physics
(IOP Science)
• 27 Oct 2020
Svetislav, Savović • Djordjevich, Alexandar • Simović, Ana • Drljača, Branko
The influence of mode coupling on three-channel spatial division multiplexing capability in
multimode graded index plastic optical fibers is investigated by solving the power flow
equation. Our numerical results show that mode coupling significantly limits the fiber length at
which the spatial division multiplexing can be realized with a minimal crosstalk between three
neighbor spatial optical channels. Three spatial channels in the multimode graded index plastic
optical fiber can be employ ...
Journal of Russian Laser Research
(Springer Link)
• 03 Jul 2021
Drljača, Branko • Simović, Ana • Djordjevich, Alexandar • Savović, Svetislav
We investigate the bandwidth and steady-state losses of multimode W-type plastic optical fibers solving the time-dependent power flow equation and show how the bandwidth in W-type plastic optical
fibers can be enhanced by increasing the wavelength for different widths of the intermediate layer
and refractive indices of the outer cladding. Such characterization of the fibers is consistent with
their manifested efficiency in reducing modal dispersion and increasing bandwidth; this fact facilita ...
Laser Physics
(IOP Science)
• 16 Jul 2021
Drljača, Branko • Simović, Ana • Djordjevich, Alexandar • Min, Rui • Jovanović, Slavica • Savović, Svetislav
We show strong effects of width of the launch beam’s angular distribution on bandwidth and
mode coupling in W-type plastic optical fibers (POFs). In general, the broader this width, the
stronger the coupling and the lower the bandwidth—but the bandwidth drop due to this effect
tapers off with distance from the input end and ceases at lengths over 25 m as the steady state
distribution is reached. With increasing the strength of mode coupling, the equilibrium mode
distribution is reached at s ...
