SYMPOSIA PAPER Published: 01 January 1988

Production and Properties of Perrhenate-Doped Alkali Halide Crystals


The growth and selected properties of single crystals of KCl doped with ReO4- is described. The crystals have been used as saturable absorbers to modulate and control CO2 laser radiation. ReO4- ion concentrations in excess of 1017 cm-3 were achieved in KCl with good optical quality. The room temperature absorption of the ReO4- ion in KCl was centered at 936.8 cm-1 with 1.5 cm-1 linewidth and with absorption cross-section determined to be (0.46 + 0.02) × 10-16 cm2. The addition of Li+ as a second dopant resulted in a splitting of the ReO4- resonance into two components at 957.5 cm-1 and 900.7 cm-1.

The characteristically sharp resonance of ReO4- was not detected in NaCl grown with NaReO4 additions to the melt. Only with addition of Ca++ as a co-dopant was the ReO4- resonance observed. The absorption, detected as a very weak resonance through a 92 mm path length, was centered at 946.0 cm-1with linewidth of 6 cm-1, over-lapping the P(20) transition in the 10 micron CO2 band.

Author Information

Nestor, OH
Figueira, JF
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Developed by Committee: F01
Pages: 22–28
DOI: 10.1520/STP24399S
ISBN-EB: 978-0-8031-5033-1
ISBN-13: 978-0-8031-4481-1