Abstract
Fluorescence spectra of Nd: YVO4 under excitation of a continuous wave (CW) diode laser and a femtosecond laser at 800nm were investigated. It was found that Nd: YVO4 shows different upconversion and downconversion luminescencent behaviors when excited by the diode laser and the femtosecond laser. The dependence of the upconversion luminescence intensity on the pump power of the femtosecond laser was discussed. The populations of the upper energy levels for upconversion and downconversion luminescence were calculated based on the Bloch equations. The calculations agree well with the experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 1384-1389 |
| Number of pages | 6 |
| Journal | Optics Express |
| Volume | 15 |
| Issue number | 3 |
| DOIs | |
| State | Published - 5 Feb 2007 |
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