TY  - CONF
AU  - Dragaš, Milica
AU  - Kršić, Jelena
AU  - Đorđević, Katarina Lj.
AU  - Stojanović, Nikola
AU  - Petrović, Jovana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11439
AB  - Optical fibre sensors have attracted much attention as noninvasive electrically immune multiparameter diagnostic tools. Optical fibre gratings - resonant structures inside fibres, enable localized and distributed high-precision measurement schemes for the use in cardiology, pulmonology, prosthetics, obstetrics, etc. Particular niche market is reserved for broadband LPG sensors, which expel light from the fibre core to the cladding and thus enable sensitive measurement of the external refractive index and curvature. With the new costcutting LPG fabrication methods on the raise the question of the source and detector cost gets into focus. While the broadband coherent sources are usually used in laboratory, the source and spectrum analyser costs are prohibitive for many field applications. In this paper, we evaluate the performance and cost-benefit of the incoherent source application. The sensor performance is assessed in terms of sensing precision and signal-to-noise signal quality for broadband and lateral edge sensing schemes. It is sufficient for basic heart and respiration rate monitoring, but fails to satisfy stricter requirements for medical diagnostics.
PB  - IEEE
C3  - IcETRAN 2023 : 10th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
T1  - Evaluation of the use of incoherent light sources in fibre grating sensing for applications in non-invasive medical diagnostics
SP  - 191225
DO  - 10.1109/IcETRAN59631.2023.10192123
ER  - 

@conference{
author = "Dragaš, Milica and Kršić, Jelena and Đorđević, Katarina Lj. and Stojanović, Nikola and Petrović, Jovana",
year = "2023",
abstract = "Optical fibre sensors have attracted much attention as noninvasive electrically immune multiparameter diagnostic tools. Optical fibre gratings - resonant structures inside fibres, enable localized and distributed high-precision measurement schemes for the use in cardiology, pulmonology, prosthetics, obstetrics, etc. Particular niche market is reserved for broadband LPG sensors, which expel light from the fibre core to the cladding and thus enable sensitive measurement of the external refractive index and curvature. With the new costcutting LPG fabrication methods on the raise the question of the source and detector cost gets into focus. While the broadband coherent sources are usually used in laboratory, the source and spectrum analyser costs are prohibitive for many field applications. In this paper, we evaluate the performance and cost-benefit of the incoherent source application. The sensor performance is assessed in terms of sensing precision and signal-to-noise signal quality for broadband and lateral edge sensing schemes. It is sufficient for basic heart and respiration rate monitoring, but fails to satisfy stricter requirements for medical diagnostics.",
publisher = "IEEE",
journal = "IcETRAN 2023 : 10th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book",
title = "Evaluation of the use of incoherent light sources in fibre grating sensing for applications in non-invasive medical diagnostics",
pages = "191225",
doi = "10.1109/IcETRAN59631.2023.10192123"
}

Dragaš, M., Kršić, J., Đorđević, K. Lj., Stojanović, N.,& Petrović, J.. (2023). Evaluation of the use of incoherent light sources in fibre grating sensing for applications in non-invasive medical diagnostics. in IcETRAN 2023 : 10th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
IEEE., 191225.
https://doi.org/10.1109/IcETRAN59631.2023.10192123

Dragaš M, Kršić J, Đorđević KL, Stojanović N, Petrović J. Evaluation of the use of incoherent light sources in fibre grating sensing for applications in non-invasive medical diagnostics. in IcETRAN 2023 : 10th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book. 2023;:191225.
doi:10.1109/IcETRAN59631.2023.10192123 .

Dragaš, Milica, Kršić, Jelena, Đorđević, Katarina Lj., Stojanović, Nikola, Petrović, Jovana, "Evaluation of the use of incoherent light sources in fibre grating sensing for applications in non-invasive medical diagnostics" in IcETRAN 2023 : 10th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book (2023):191225,
https://doi.org/10.1109/IcETRAN59631.2023.10192123 . .

TY  - JOUR
AU  - Petrović, Jovana S.
AU  - Maluckov, Aleksandra
AU  - Stojanović, Nikola
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10462
AB  - Multiarm interferometers can enhance measurement precision and provide multiparameter capability to the measurement. Their realisation requires multiport beam splitters, which has been a long-standing challenge in free-space and integrated optics. Here, we propose a new type of multiport interferometers suitable for implementation on optical chips. Their prospective advantages over the standard directional-coupler architectures: an arbitrary number of arms, planar architecture and two orders of magnitude reduction in footprint, are achieved by the layout based exclusively on the finite modulated photonic lattices. The inverse design of photonic lattices is facilitated by restricting the light propagation to periodic patterns. The corresponding interferometer model predicts the maximum $$1/\sqrt{N}$$sensitivity scaling with the number of arms N. While the presented design solutions are ubiquitous to all implementations, the advantages are discussed in both the low and high refractive-index contrast platforms. Finally, we provide an outlook on the possibilities for the interferometer applications in distributed classical and quantum measurements.
T2  - Optical and Quantum Electronics
T1  - Bend-free multiarm interferometers on optical chips
VL  - 54
IS  - 11
SP  - 687
DO  - 10.1007/s11082-022-04048-1
ER  - 

@article{
author = "Petrović, Jovana S. and Maluckov, Aleksandra and Stojanović, Nikola",
year = "2022",
abstract = "Multiarm interferometers can enhance measurement precision and provide multiparameter capability to the measurement. Their realisation requires multiport beam splitters, which has been a long-standing challenge in free-space and integrated optics. Here, we propose a new type of multiport interferometers suitable for implementation on optical chips. Their prospective advantages over the standard directional-coupler architectures: an arbitrary number of arms, planar architecture and two orders of magnitude reduction in footprint, are achieved by the layout based exclusively on the finite modulated photonic lattices. The inverse design of photonic lattices is facilitated by restricting the light propagation to periodic patterns. The corresponding interferometer model predicts the maximum $$1/\sqrt{N}$$sensitivity scaling with the number of arms N. While the presented design solutions are ubiquitous to all implementations, the advantages are discussed in both the low and high refractive-index contrast platforms. Finally, we provide an outlook on the possibilities for the interferometer applications in distributed classical and quantum measurements.",
journal = "Optical and Quantum Electronics",
title = "Bend-free multiarm interferometers on optical chips",
volume = "54",
number = "11",
pages = "687",
doi = "10.1007/s11082-022-04048-1"
}

Petrović, J. S., Maluckov, A.,& Stojanović, N.. (2022). Bend-free multiarm interferometers on optical chips. in Optical and Quantum Electronics, 54(11), 687.
https://doi.org/10.1007/s11082-022-04048-1

Petrović JS, Maluckov A, Stojanović N. Bend-free multiarm interferometers on optical chips. in Optical and Quantum Electronics. 2022;54(11):687.
doi:10.1007/s11082-022-04048-1 .

Petrović, Jovana S., Maluckov, Aleksandra, Stojanović, Nikola, "Bend-free multiarm interferometers on optical chips" in Optical and Quantum Electronics, 54, no. 11 (2022):687,
https://doi.org/10.1007/s11082-022-04048-1 . .

TY  - JOUR
AU  - Petrović, Jovana S.
AU  - Maluckov, Aleksandra
AU  - Stojanović, Nikola
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10748
AB  - Multiarm interferometers can enhance measurement precision and provide multiparameter capability to the measurement. Their realisation requires multiport beam splitters, which has been a long-standing challenge in free-space and integrated optics. Here, we propose a new type of multiport interferometers suitable for implementation on optical chips. Their prospective advantages over the standard directional-coupler architectures: an arbitrary number of arms, planar architecture and two orders of magnitude reduction in footprint, are achieved by the layout based exclusively on the finite modulated photonic lattices. The inverse design of photonic lattices is facilitated by restricting the light propagation to periodic patterns. The corresponding interferometer model predicts the maximum $$1/\sqrt{N}$$sensitivity scaling with the number of arms N. While the presented design solutions are ubiquitous to all implementations, the advantages are discussed in both the low and high refractive-index contrast platforms. Finally, we provide an outlook on the possibilities for the interferometer applications in distributed classical and quantum measurements.
T2  - Optical and Quantum Electronics
T1  - Bend-free multiarm interferometers on optical chips
VL  - 54
IS  - 11
SP  - 687
DO  - 10.1007/s11082-022-04048-1
ER  - 

@article{
author = "Petrović, Jovana S. and Maluckov, Aleksandra and Stojanović, Nikola",
year = "2022",
abstract = "Multiarm interferometers can enhance measurement precision and provide multiparameter capability to the measurement. Their realisation requires multiport beam splitters, which has been a long-standing challenge in free-space and integrated optics. Here, we propose a new type of multiport interferometers suitable for implementation on optical chips. Their prospective advantages over the standard directional-coupler architectures: an arbitrary number of arms, planar architecture and two orders of magnitude reduction in footprint, are achieved by the layout based exclusively on the finite modulated photonic lattices. The inverse design of photonic lattices is facilitated by restricting the light propagation to periodic patterns. The corresponding interferometer model predicts the maximum $$1/\sqrt{N}$$sensitivity scaling with the number of arms N. While the presented design solutions are ubiquitous to all implementations, the advantages are discussed in both the low and high refractive-index contrast platforms. Finally, we provide an outlook on the possibilities for the interferometer applications in distributed classical and quantum measurements.",
journal = "Optical and Quantum Electronics",
title = "Bend-free multiarm interferometers on optical chips",
volume = "54",
number = "11",
pages = "687",
doi = "10.1007/s11082-022-04048-1"
}

Petrović, J. S., Maluckov, A.,& Stojanović, N.. (2022). Bend-free multiarm interferometers on optical chips. in Optical and Quantum Electronics, 54(11), 687.
https://doi.org/10.1007/s11082-022-04048-1

Petrović JS, Maluckov A, Stojanović N. Bend-free multiarm interferometers on optical chips. in Optical and Quantum Electronics. 2022;54(11):687.
doi:10.1007/s11082-022-04048-1 .

Petrović, Jovana S., Maluckov, Aleksandra, Stojanović, Nikola, "Bend-free multiarm interferometers on optical chips" in Optical and Quantum Electronics, 54, no. 11 (2022):687,
https://doi.org/10.1007/s11082-022-04048-1 . .

TY  - JOUR
AU  - Pan, Rui
AU  - Zapolnova, Ekaterina
AU  - Golz, Torsten
AU  - Krmpot, Aleksandar J.
AU  - Rabasović, Mihailo D.
AU  - Petrović, Jovana S.
AU  - Asgekar, Vivek
AU  - Faatz, Bart
AU  - Tavella, Franz
AU  - Perucchi, Andrea
AU  - Kovalev, Sergey
AU  - Green, Bertram Windisch
AU  - Geloni, Gianluca
AU  - Tanikawa, Takanori
AU  - Yurkov, Mikhail
AU  - Schneidmiller, Evgeny
AU  - Gensch, Michael
AU  - Stojanović, Nikola
PY  - 2019
UR  - http://scripts.iucr.org/cgi-bin/paper?S1600577519003412
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8197
AB  - The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts and naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along with the auxiliary NIR and VIS ultrashort lasers, supports a plethora of dynamic investigations in physics, material science and biology. The unique features of the FLASH THz pulses and the accelerator source, however, bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles. Here, these challenges are discussed and the pulse diagnostic tools developed at FLASH are presented. In particular, a radiometric power measurement is presented that enables the derivation of the average pulse energy within a pulse burst across the spectral range, jitter-corrected electro-optical sampling for the full spectro-temporal pulse characterization, spatial beam profiling along the beam transport line and at the sample, and a lamellar grating based Fourier transform infrared spectrometer for the on-line assessment of the average THz pulse spectra. Corresponding measurement results provide a comprehensive insight into the THz beamline capabilities.
T2  - Journal of Synchrotron Radiation
T1  - Photon diagnostics at the FLASH THz beamline
VL  - 26
IS  - 3
SP  - 700
EP  - 707
DO  - 10.1107/S1600577519003412
ER  - 

@article{
author = "Pan, Rui and Zapolnova, Ekaterina and Golz, Torsten and Krmpot, Aleksandar J. and Rabasović, Mihailo D. and Petrović, Jovana S. and Asgekar, Vivek and Faatz, Bart and Tavella, Franz and Perucchi, Andrea and Kovalev, Sergey and Green, Bertram Windisch and Geloni, Gianluca and Tanikawa, Takanori and Yurkov, Mikhail and Schneidmiller, Evgeny and Gensch, Michael and Stojanović, Nikola",
year = "2019",
abstract = "The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts and naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along with the auxiliary NIR and VIS ultrashort lasers, supports a plethora of dynamic investigations in physics, material science and biology. The unique features of the FLASH THz pulses and the accelerator source, however, bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles. Here, these challenges are discussed and the pulse diagnostic tools developed at FLASH are presented. In particular, a radiometric power measurement is presented that enables the derivation of the average pulse energy within a pulse burst across the spectral range, jitter-corrected electro-optical sampling for the full spectro-temporal pulse characterization, spatial beam profiling along the beam transport line and at the sample, and a lamellar grating based Fourier transform infrared spectrometer for the on-line assessment of the average THz pulse spectra. Corresponding measurement results provide a comprehensive insight into the THz beamline capabilities.",
journal = "Journal of Synchrotron Radiation",
title = "Photon diagnostics at the FLASH THz beamline",
volume = "26",
number = "3",
pages = "700-707",
doi = "10.1107/S1600577519003412"
}

Pan, R., Zapolnova, E., Golz, T., Krmpot, A. J., Rabasović, M. D., Petrović, J. S., Asgekar, V., Faatz, B., Tavella, F., Perucchi, A., Kovalev, S., Green, B. W., Geloni, G., Tanikawa, T., Yurkov, M., Schneidmiller, E., Gensch, M.,& Stojanović, N.. (2019). Photon diagnostics at the FLASH THz beamline. in Journal of Synchrotron Radiation, 26(3), 700-707.
https://doi.org/10.1107/S1600577519003412

Pan R, Zapolnova E, Golz T, Krmpot AJ, Rabasović MD, Petrović JS, Asgekar V, Faatz B, Tavella F, Perucchi A, Kovalev S, Green BW, Geloni G, Tanikawa T, Yurkov M, Schneidmiller E, Gensch M, Stojanović N. Photon diagnostics at the FLASH THz beamline. in Journal of Synchrotron Radiation. 2019;26(3):700-707.
doi:10.1107/S1600577519003412 .

Pan, Rui, Zapolnova, Ekaterina, Golz, Torsten, Krmpot, Aleksandar J., Rabasović, Mihailo D., Petrović, Jovana S., Asgekar, Vivek, Faatz, Bart, Tavella, Franz, Perucchi, Andrea, Kovalev, Sergey, Green, Bertram Windisch, Geloni, Gianluca, Tanikawa, Takanori, Yurkov, Mikhail, Schneidmiller, Evgeny, Gensch, Michael, Stojanović, Nikola, "Photon diagnostics at the FLASH THz beamline" in Journal of Synchrotron Radiation, 26, no. 3 (2019):700-707,
https://doi.org/10.1107/S1600577519003412 . .