Thermal behavior of NdP5O14 lasers

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Abstract
Thermally induced changes in the output behavior of a quasi‐cw NdP5O14 laser under different pump duty cycles have been studied both theoretically and experimentally. With a cavity design which supports thermally stable Gaussian modes, no anomalous mode or spectral changes were observed under different heating or drive conditions. The magnitude of the remaining thermal effects on the microscopic lasing properties of the material are reviewed and compared. The decrease of laser output power at high average excitation levels is attributed mainly to a terminal state population increase with rising temperature, and results calculated from this model are in good agreement with the experimental data.