Abstract

The threshold and efficiency of a transversely excited, cw NdP₅O₁₄ laser have been measured with 0.58-μm excitation from a dye laser and 0.8-μm excitation from a semiconductor laser. After fitting our data for the threshold as a function of wavelength near 0.58 μm, we have applied the calculations to the 0.80-μm Nd³⁺ absorption band. With transverse excitation from high-radiance LED’s or laser diodes, thresholds are calculated to be 4–8.5 mW at 0.80 μm, depending on pump bandwidth. Using an Al_xGa_1−xAs double-hetero-structure laser diode pump, we have obtained quasi-cw lasing in NdP₅O₁₄, with thresholds ~7 mW and optical power conversion efficiency ~7%.

© 1976 Optical Society of America

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