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The absorption and fluorescence spectra of the neodymium-doped yttrium orthovanadate (Nd:YVO 4 ) single crystal were investigated carefully. For the 808.8-nm absorption cross section, the published values varied between 18.4 and 25.6 ×10 -20 cm 2 for π-polarization. The authors evaluated this spectroscopic parameter with high resolution at 0.5 nm, and discovered 48.4 cm -1 at 808.8 nm even for the absorption of 1 at.% Nd 3+ -ion-doped YVO 4 single crystal. This value is 1.3 times larger than the well-known value, and confirms that Nd:YVO 4 is very suitable for microchip lasers, and that certain laser characteristics of Nd:YVO 4 of previous works should be re-evaluated.
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Sato et al. (2002) studied this question.