Radek ByrtusDepartment of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB–Technical University of Ostrava, 17. listopadu 2172/15, 70800 Ostrava, Czech RepublicKeywords: optical fiber; temperature measurement; probe construction; dark current; high temperature;ruby crystalhttps://www.scopus.com/authid/detail.uri?authorId=57259341600