Ground State Depleted (GSD) Solid State Lasers: Principles, Characteristics, And Scaling

William F. Kruoke; L. L. Chase

doi:10.1117/12.951170

6 July 1989 Ground State Depleted (GSD) Solid State Lasers: Principles, Characteristics, And Scaling

William F. Kruoke, L. L. Chase

Proceedings Volume 1040, High Power and Solid State Lasers II; (1989) https://doi.org/10.1117/12.951170
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

A novel class of rare earth doped solid state lasers is described. The Ground State Depleted (GSD) laser is pumped by an intense (>tens kW/cm²) narrowband (<few nm) laser source and is characterized by: (1) an unusually low laser ion doping density (5-10 x 1018 ions/cc), (2) an unusually large fractional excited population inversion density (4-8 x 10¹⁸ ions/cc or >75%), (3) a gain element that is optically thick at the pump wavelength, (4) a gain element that has a substantially uniform gain distribution due to a bleaching of the pump transition at the pump intensity utilized. These features enable efficient room temperature operation of rare earth ion laser transitions terminating on the ground manifold. The relationships between laser parameters (cross sections, saturation fluences and fluxes, bleaching wave velocities, etc.) are given and laser performance scaling relationships are presented and discussed.

Citation Download Citation

William F. Kruoke and L. L. Chase "Ground State Depleted (GSD) Solid State Lasers: Principles, Characteristics, And Scaling", Proc. SPIE 1040, High Power and Solid State Lasers II, (6 July 1989); https://doi.org/10.1117/12.951170

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