Abstract

Continuous-wave tunable laser operation of direct diode-pumped Cr<sup>4+</sup>:Mg<sub>2</sub>SiO<sub>4</sub> (Cr:forsterite) and Cr<sup>4+</sup>:Ca<sub>2</sub>GeO<sub>4</sub> (cunyite) crystal were demonstrated. Diode-pumped Cr:forsterite was tunable over the 1236–1300-nm spectral range. The maximum output of 10 mW was measured at 1260 nm for 640 mW of pump power absorbed by the crystal. Diode-pumped laser operation of cunyite was also demonstrated over the 1390–1475-nm range. Free-running 20-mW output was centered at 1410 nm.

© 1997 Optical Society of America

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