Abstract
A high efficiency laser diode array pumped Nd:YAG solid state laser has recently been demonstrated.1 We report for the first time a diode array pumped rare-earth laser other than Nd. Laser action was observed on the trivalent Holmium 5I7→5I8, 2.1 μm transition. Laser sources in this wavelength region are required in infrared optical fiber communication systems.
© 1986 Optical Society of America
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