| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1495679 | Optical Materials | 2011 | 5 Pages |
Spectroscopic characterization of co-doped Tm,Ho:YVO4 crystal grown by the Czochralski method has been performed including absorption spectrum, emitting spectrum and luminescence decay lifetime. The polarization emitting spectrum around 2 μm is accomplished by exciting a singly Ho3+ doped YVO4 crystal to exclude the influence of Tm3+3F4–3H6 transition and the emission cross section is deduced from both Fuchtbauer–Ladenburg (F–L) equation and reciprocity method (RM). In addition, we report up to 10.4 W continuous wave (CW) output with a conversion efficiency of 40% and 10.3 W Q-Switch output with 12.5 kHz pulse repetition rate of diode-pumped cryogenic Tm,Ho:YVO4 laser. For Q-Switch operation, the minimum pulse width of 28.2 ns is obtained, all of which demonstrate that the Tm,Ho:YVO4 is excellent laser material for 2 μm radiation.
Research highlights► Tm,Ho:YVO4 crystal was grown by the Czochralski method. ► A number of spectroscopic measurements were performed on it. ► The spectrum indicates it is excellent laser material for 2 μm radiation. ► Up to 10.4 W continuous wave (CW) output was achieved under cryogenic temperature. ► For Q-switch operation we obtained 10.3 W output with 12.5 kHz pulse repetition rate.
