Abstract
Absorption and luminescence spectra and luminescence kinetics of Yb have been measured in crystals of Yb,Er:LaSc3(BO3)4 (LSB) for a wide region of variation of activator concentration. It has been established that an effective absorption cross-section of Yb3+ at the maximum of 982 nm is equal to 1.16×10-20 cm2. Effective absorption and emission cross-sections of Er3+at generation wavelength of 1555 nm are equal to σab = 4.4×10-21 and σem = 5.2×10-21 cm-2, respectively. 2F5/2Yb3+→4I11/2Er3+ energy transfer for dominating luminescence centers in Yb,Er:LSB is described satisfactorily by a dipole-dipole interaction with CDA = 4.16×10-39 cm-6. Yb-Yb energy migration is very efficient and described by a hopping mechanism with CDD = 3.5×10-38 cm-6, the quantum efficiency in Yb0.15 (6.7×1020 cm-3), Er0.015 (6.7×1019 cm-3):LSB crystals has achieved 98%. Investigations of Yb,Er:LSB crystals have shown them to have necessary combination of properties to get an effective generation of 1.5 μm eye-safe radiation with laser diode pumping.
| Original language | English |
|---|---|
| Pages (from-to) | 121-126 |
| Number of pages | 6 |
| Journal | Optical Materials |
| Volume | 14 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - May 2000 |
| Externally published | Yes |
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