Abstract

We report what is to our knowledge the first directly diode-pumped tunable (over 120 nm) continuous-wave Cr4+:YAG laser, operating near 1.5 µm. At room temperature the laser delivered as much as 200 mW of power at 4 W of absorbed pump power. We also report observation of slow laser output degradation and bleaching in highly concentrated cyrstals, which we suggest is due to a photorefractive phenomenon.

© 1999 Optical Society of America

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