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Andrei Stancalie   Dr.  Other 
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Andrei Stancalie published an article in January 2018.
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Manfred Rothhardt

140 shared publications

Leibniz Institute of Photonic Technology, 07745 Jena, Germany

Martin Becker

121 shared publications

Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Strasse 9, 07745 Jena, Germany

Dan Sporea

40 shared publications

CETAL, Photonic Investigations Laboratory, National Institute for Laser, Plasma and Radiation Physics, Măgurele 77125, Romania

Nicu Becherescu

2 shared publications

8
Publications
5
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11
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Publication Record
Distribution of Articles published per year 
(2014 - 2018)
Total number of journals
published in
 
6
 
Publications See all
PROCEEDINGS-ARTICLE 0 Reads 0 Citations Gamma Radiation Measurements using an Optical Fiber Laser Rosa Ana Perez-Herrera, Andrei Stancalie, Pablo Cabezudo, Da... Published: 01 January 2018
26th International Conference on Optical Fiber Sensors, doi: 10.1364/ofs.2018.wf37
DOI See at publisher website
PROCEEDINGS-ARTICLE 0 Reads 0 Citations Gamma radiation effects on Long Period Gratings and transmitted power in different optical fibers: towards dosimetry app... Flavio Esposito, Andrei Stăncălie, Rajeev Ranjan, Daniel Neg... Published: 01 January 2018
26th International Conference on Optical Fiber Sensors, doi: 10.1364/ofs.2018.tue85
DOI See at publisher website
Article 0 Reads 6 Citations Arc-induced Long Period Gratings in standard and speciality optical fibers under mixed neutron-gamma irradiation Andrei Stancălie, Flavio Esposito, Rajeev Ranjan, Petrişor B... Published: 20 November 2017
Scientific Reports, doi: 10.1038/s41598-017-16225-4
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
In this paper, for the first time, the effects of mixed neutron and gamma flux on the spectral and sensing responses of Long Period Gratings (LPGs) are thoroughly analyzed. Six LPGs written by means of Electric Arc Discharge (EAD) technique in standard and speciality fibers, including radiation-hardened ones, were tested. The EAD technique was chosen because it enables the writing of gratings both in standard and not photosensitive fibers. The experiments have been carried out in a "TRIGA" pulsed nuclear reactor and the LPGs were irradiated by a gamma-ray dose-rate of 9 Gy/s and a mean 1.2∙10(12) n/(cm(2)s) neutron flux. Real time monitoring was performed for a comparative investigation of LPGs' response, in terms of radiation sensitivity and wavelength shift. Experiments show that LPG in a radiation-resistant fiber exhibits resonant wavelength shift higher than LPG in standard fiber. The changes of temperature sensitivity due to radiation were experimentally established by comparison of pre- and post-radiation characterization, indicating that radiation effects induce a slight increase of the temperature sensitivity, except for the LPG in pure-silica fiber. Theoretical and numerical analysis was combined with experimental data for evaluation LPGs' parameters changes, such as refractive index and thermo-optic coefficient, after exposure to radiation.
Article 0 Reads 8 Citations Real-time analysis of arc-induced Long Period Gratings under gamma irradiation Flavio Esposito, Rajeev Ranjan, Andrei Stăncălie, Dan Sporea... Published: 06 March 2017
Scientific Reports, doi: 10.1038/srep43389
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In this paper, we present a comparative experimental and theoretical study on gamma radiation sensitivity of Long Period Gratings (LPGs), fabricated by electric arc discharge technique, as monitored in three single mode optical fibers supplied by different manufacturers. A real-time measurement of LPGs' wavelength shift was performed until a total dose of 35 kGy was reached, with average dose rate of 0.18 kGy/h, the irradiation being done at room temperature. In one case, a maximum radiation sensitivity of 1.34 nm/kGy was recorded for doses up to 0.5 kGy. Moreover, by combining experimental results with numerical simulations, it was found that changes occurred in the core refractive index of the irradiated optical fibers up to 2.5 ∙ 10(-5). The increase of the core thermo-optic coefficient up to 1.5 ∙ 10(-8)/°C was observed as well.
PROCEEDINGS-ARTICLE 5 Reads 1 Citation Long period gratings written in fluorine-doped fibers by electric arc discharge technique Rajeev Ranjan, Flavio Esposito, Agostino Iadicicco, Andrei S... Published: 30 May 2016
Sixth European Workshop on Optical Fibre Sensors, doi: 10.1117/12.2236841
DOI See at publisher website
PROCEEDINGS-ARTICLE 0 Reads 0 Citations Experimental and theoretical investigation of the effect of laser parameters on laser ablation and laser-induced plasma ... Andrei Stăncălie, Savu-Sorin Ciobanu, Dan Sporea Published: 12 May 2016
Optical Sensing and Detection IV, doi: 10.1117/12.2239186
DOI See at publisher website
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