Abstract

CO2-laser–diode-laser hole-burning spectroscopy has been used to measure the temperature-dependent homogeneous linewidth of the ReO4 infrared active internal-vibrational mode (ν3) in alkali halide lattices. Hole widths as small as 20 MHz (FWHM) have been observed in an inhomogeneously broadened line of width as large as 1 cm−1. Our measurement of the homogeneous linewidth over 4 orders of magnitude indicates that elastic acoustic phonon scattering is the dominant T2 relaxation process from 10 to 600 K.

© 1981 Optical Society of America

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