Radiation-resistant graded-index multimode optical fibers based on fluorosilicate glass

E. A. Pospelova^ab, P. F. Kashaykin^ab, I. A. Maltsev^a, O. L. Vokhmyanina^a, Yu. O. Sharonova^a, I. S. Azanova^a, A. L. Tomashuk<sup>ab

a</sup> Perm Scientific-Industrial Instrument-Making Company, Perm, Russia
^b Prokhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, Moscow, Russia

Abstract: Using the MCVD-technology, radiation-resistant multimode optical fibers based on fluorosilicate glass with a gradient refractive index profile were developed. Radiation-induced attenuation (RIA) of light in the fibers was compared with the literature data on analogous fibers manufactured by the PCVD-technology. It was found out that RIA in the MCVD-fibers at the wavelength $\lambda$ = 1310 nm under $\gamma$-irradiation at the doses of up to 10 kGy is 1–2 dB/km (19–29%) lower than RIA in the Super RadHard fiber produced by the PCVD-technology and previously supposed to have a record-high radiation resistance.

Keywords: radiation-induced attenuation of light, RIA, graded-index multimode optical fiber, radiation resistance.

Received: 07.02.2023
Revised: 10.03.2023
Accepted: 10.03.2023

DOI: 10.21883/PJTF.2023.09.55325.19523

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