Investigation of Thermal Sensing in Fluoroindate Yb3+/Er3+ Co-Doped Optical Fiber

Bartłomiej Starzyk; Gloria Lesly Jimenez; Marcin Kochanowicz; Marta Kuwik; Jacek Żmojda; Piotr Miluski; Agata Baranowska; Jan Dorosz; Wojciech Pisarski; Joanna Pisarska; Dominik Dorosz

doi:10.3390/ma16062139

Investigation of Thermal Sensing in Fluoroindate Yb³⁺/Er³⁺ Co-Doped Optical Fiber

Materials (Basel). 2023 Mar 7;16(6):2139. doi: 10.3390/ma16062139.

Affiliations

¹ Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Krakow, Poland.
² Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland.
³ Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland.
⁴ Faculty of Mechanical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland.

Abstract

An investigation of fluoroindate glass and fiber co-doped with Yb³⁺/Er³⁺ ions as a potential temperature sensor was assessed using the fluorescence intensity ratio (FIR) technique. Analysis of thermally coupled levels (TCLs-²H_11/2 and ⁴S_3/2), non-thermally coupled levels (non-TCLs-⁴F_7/2 and ⁴F_9/2), and their combination were examined. Additionally, the luminescent stability of the samples under constant NIR excitation using different density power at three different temperatures was carried out. The obtained values of absolute sensitivity (0.003 K^-1-glass, 0.0019 K^-1-glass fiber ²H_11/2 → ⁴S_3/2 transition) and relative sensitivity (2.05% K^-1-glass, 1.64% K^-1-glass fiber ⁴F_7/2 → ⁴F_9/2 transition), as well as high repeatability of the signal, indicate that this material could be used in temperature sensing applications.

Keywords: Er3+, Yb3+ ions; InF3 glass; fluoroindate glass; fluoroindate glass fiber; temperature sensing.

Grants and funding

2017/25/B/ST8/0253/National Science Center