Abstract:The basic purpose of research was the creation of crystal fibers for application as temperature gauges for severe environments. Single crystal fibers of sapphire and YAG with sensitive zone doped by Cr ions were successfully grown up by the Laser Heated Pedestal Growth method. The results of temperature measurements are presented for a range 25−4000• C. Those temperature dependences of luminescence lifetime and spectra of Cr 3+ -ions in the crystal fibers are consistent with the data observed with bulk samples, being grown by Czochralski technique.
mmSinge-crystal sapphire fiber doped with Cr at the tip
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