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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1989),
  • paper CPD9

High-Efficiency Diode-Array Side-Pumped Neodymium Laser

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Abstract

We report here the demonstration of a scalable side-pumped neodymium solid-state lasers with internal photon efficiencies approaching the quantum limit for conversion of diode-array pump light to laser output near 1.06 μm. Lasers in Nd:YAG, Nd:BeL (lanthanum beryllate), and Nd: Phosphate Glass were excited in a geometry using cylindrical laser rods pumped transversely by a 1 cm long by 5 bar GaAlAs diode laser array. We have obtained in Nd:YAG an overall efficiency of 18% for conversion of electrical input to the pump diode to laser output at 1.06 μm. This efficiency is the highest reported for any solid-state laser with the exception of the GaAlAs laser diode arrays themselves. We believe that these results foreshadow the development of high-power solid state laser systems with overall efficiencies well in excess of 20%.

© 1989 Optical Society of America

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