Highly efficient laser operation of Nd-vanadates under direct pumping into the emitting level

Nicolaie A. Pavel; Yoichi Sato; Voicu Lupei; Takunori Taira

doi:10.1117/12.582790

21 October 2004 Highly efficient laser operation of Nd-vanadates under direct pumping into the emitting level

Nicolaie A. Pavel, Yoichi Sato, Voicu Lupei, Takunori Taira

Proceedings Volume 5581, ROMOPTO 2003: Seventh Conference on Optics; (2004) https://doi.org/10.1117/12.582790
Event: ROMOPTO 2003: Seventh Conference on Optics, 2003, Constanta, Romania

Abstract

Highly efficient one-micron laser emission in Nd-doped vanadates under direct pumping into the ⁴F_3/2 emitting level is reported. A 1.0-mm-thick, 1.0-at.% Nd:YVO₄ crystal operated with 80% slope efficiency (79% overall optical-to-optical efficiency) under Ti:Sapphire pumping and 75% slope efficiency versus absorbed power under diode laser pumping at 880 nm. Slope efficiency of 80% (overall optical-to-optical efficiency of 77%) under Ti:Sapphire pumping and 66% with respect to the absorbed power under diode laser pumping at 879 nm is obtained from a 3.0-mm-thick, 1.0-at.% Nd:GdVO₄ crystal. These values, which were superior to those obtained by pumping into the ⁴F_5/2 level, were explained consistently by the effect of the quantum defect between the pump and laser radiation, the superposition of pump and laser mode volumes, the pump level efficiency and the residual optical losses.

Citation Download Citation

Nicolaie A. Pavel, Yoichi Sato, Voicu Lupei, and Takunori Taira "Highly efficient laser operation of Nd-vanadates under direct pumping into the emitting level", Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); https://doi.org/10.1117/12.582790

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