A Tunable Visible Solid State Laser

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Abstract
Laser operation and radiative properties of organically doped porous sol-gel silica have been studied using a range of cavities. Measurements of diffusion, distribution and long term photostability of dopant dye molecules are described. Laser oscillation at wavelengths of between 360 and 630 nm are reported. This represents a substantial increase over the range previously reported for organic dye doped silica lasers. In a Littrow configuration a tuning range of 60 nm and a conversion efficiency of 16% have been observed. A linewidth of <0·05 nm has been obtained using a grazing incidence cavity.