CC BY
2*
ALT'23
The 30th International Conference on Advanced Laser Technologies
LS-P-4
Changing the spectrum of the arsenic sulfide fiber by X-ray radiation
V.V. Gerasimenko, A.N. Kachemtsev, I.V.
Skripach^
v, G.E. Snopatin
Institute of Chemistry of High-Purity Substances named after G.G. Deviatich of the Russian Academy of Sciences,
603951, Nizhny Novgorod, Box-75, ul. Tropinina, 49,
kachemcev@ihps-nnov. ru
Changes in the structure and properties of arsenic sulfide that occur as a result of irradiation with radiation of various nature have been studied for more than 60 years. The main results of studying the effect of radiation on the characteristics of both bulk samples and thin films of As2S3 are given, for example, [1,2]. The properties of light guides from As2S3 also change during and after radiation exposure, however, these processes have not been sufficiently studied. The work is devoted to the experimental determination of the spectral characteristics of an IR fiber made of high-purity arsenic sulfide after irradiation of samples with a source of continuous X-ray radiation. The maximum quantum energy is up to 100 keV, and the effective energy is 10 keV. The level of exposure was more than 12 kGy.
Two samples of a multimode fiber have been studied. Before and after irradiation, the transmission spectrum of the light guide was measured in the range of 2,0...6,0 microns. The measurements were carried out according to the procedure given in [3]. The measurement results are shown in Figure 1. Stationary irradiation with X-ray quanta of an arsenic sulfide fiber leads to a significant increase in the absorption of IR radiation in the entire studied range. In the region of 2.5 microns, the signal attenuation increased approximately 10 times. In addition, a change in the height of the impurity absorption peaks in the wavelength range of 4 - 4.5 microns in the irradiated samples was recorded in comparison with the initial spectrum. Figure 2 shows the spectral characteristics of the fiber normalized for minimum attenuation. Figure 2 allows us to qualitatively compare the obtained dependences and assess the presence of changes in the spectral characteristics of sulfide-arsenic light guides after radiation exposure, in particular, a significant broadening of the impurity absorption peak in the region of 3 microns with its significant expansion in the region of shorter wavelengths.
Fig. 1 Spectrum of As2S3 fiber before (green) and after (red and blue) irradiation
Absorbed dose of the X-ray fiber: sample No. 1 (red) - 416 G/m; sample No. 2 (blue) - 388 Gy/m.
Fig. 2 Comparison of IR fiber spectra normalized to a minimum of losses before (green) and after (red and blue) irradiation
Absorbed dose of the X-ray fiber: sample No. 1 (red) - 416 G/m; sample No. 2 (blue) - 388 Gy/m.
The research was carried out with the support of the Russian Science Foundation, RGNF grant No. 22-1300226.
[1] O. Shpotyuk, M. Shpotyuk, S. Ubizskii, Radiation-induced optical effects in chalcogenide semiconductor glasses, Radiation&Application, vol. 2, issue 2, pp. 94-100, (2017).
[2] M. Shpotyuk, A. Kovalskiy, R. Golovchak, O. Shpotyuk, Phenomenology of y-irradiation-induced changes in optical properties of chalcogenide semiconductor glasses: A case study of binary arsenic sulfides, Journal of Non-Crystalline Solids, vol. 498, pp. 315-322, (2018).
[3] V.G. Plotnichenko, V.K. Sysoev Measurement of total loss spectra in fiber optical fibers of the near and middle IR range, Journal of Applied Spectroscopy, vol. XXXVIII, issue 3, pp. 506-509, (1983).
