Abstract
Temperature is an important parameter that needs accurate measurement. Theoretical descriptions of the fluorescence ratio method, fluorescence lifetime sensing, and interferometric methods for temperature measurement are given. Fluorescence lifetime sensing calibration plots have been developed for temperature measurement from 20°C to 600°C using -doped glass, and from 20°C to 90°C using -doped . Lifetime sensing results of -doped YAG and -doped fluoride crystals for temperature measurement are also summarized. Mach–Zehnder interferometer measurements revealed that the passage of a 300 mW laser beam of 915 nm changed the temperature of the -doped YAG crystal by 7.1°C. The interferometer technique is useful for measuring absolute temperature changes in laser cooling studies.
© 2013 Optical Society of America
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