Knowing the effects of reabsorption effects on the laser gain (chapter 1), changes in the crystal size and pump wavelength were made, trying to reduce these effects. The main idea in this case was to distribute more the absorption all over the crystal, thus improving the heat dissipation. With a better heat distribution comes the lower temperature in the crystal which results in a lower population in the lower laser level and consequently lower
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reabsorption loss. In order to get a better distribution of the absorption, either the concentration of Nd3+ should be reduced or a smaller absorption coefficient/cross section should be chosen.