Spectroscopic investigations of new active media for diode-pumped solid state lasers (original) (raw)
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Spectroscopic investigations of the new active media for diode-pumped solid-state lasers
1995
Investigation of spectroscopic properties of yttrium-aluminum garnet Y3Al5O12 (YAG) doped with ions of rare-earth elements Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Ho3+, Er3+, Tm3+, Yb3+ monocrystals yttrium-aluminum perovskite YAlO3 (YAP), SrLaGa3O7 (SLGO) and SrLaAlO4 (SLAO) doped with Nd3+, and LiNbO3 doped with Er3+ and Tm3+ obtained by the Czochralski method have been realized. Absorption spectra of the monocrystals were determined in
Analysis of absorption spectra of the crystals for coherent radiation pumped solid state lasers
Laser Optics '95: Solid State Lasers, 1996
Investigations of spectroscopic properties of yttrium-aluminum garnet Y 3 Al 5 O 12 (YAG) doped with Ce, Pr, Nd, Sm, Eu, Ho, Er, Tm, Yb ions and Nd:YAP, Nd:SrLaGa 3 O 7 , Nd:SrLaAlO 4 , Nd:YVO 4 , Nd:LiYF 4 , Nd:PbMoO 4 , Nd:LGS, Nd:GGG, Nd:SVAP monocrystals have been realized. Absorption spectra of the monocrystals in the range 200nm÷20µm and the luminescence spectra in the range 200-800 nm were determined. Except for Pr:YAG, Sm:YAG, Eu:YAG and Pr,Yb:YAG in all other materials an appearance of strong absorption bands in the range of 780-840 nm has been stated what enabled to carry out an efficiency analysis of selective pumping with the use of GaAlAs laser diodes.
Optical and lasing properties of crystals for diode pumped solid state lasers
SVAP monocrystals have been investigated. Absorption spectra of the monocrystals in the range 200nm-20µm and the luminescence spectra in the range 200-800nm for Pr:YAG, Pr:YAP and Pr:SrLaGa 3 O 7 were determined. Except for Pr:YAG, Sm:YAG, Eu:YAG and Pr,Yb:YAG in all other materials strong absorption bands appeared in the range of 780-840 nm, whicht enabled an efficiency analysis of selective pumping to be carried out with the use of GaAlAs laser diodes.
Efficient 1 W continuous-wave diode-pumped Er,Yb:YAl_3(BO_3)_4 laser
Optics Letters, 2007
We report the spectroscopy and high-power continuous-wave (CW) diode-pumped laser operation of Er: Yb: YAl 3 ͑BO 3 ͒ 4 crystal. Absorption and stimulated emission spectra, emission lifetimes, and efficiency of energy transfer from Yb 3+ to Er 3+ ions were determined. A CW Er: Yb: YAB laser emitting at 1602, 1555, and 1531 nm with output power as high as 1 W and slope efficiency up to 35% was demonstrated.
SINGLE-EMITTER LASER-DIODE-PUMPED CAVITY-DUMPED YTTERBIUM-DOPED Y 3 Al 5 O 12 LASER 1
2018
We have developed a single-emitter laser-diode (LD)-pumped cavity-dumped ytterbium-doped yttrium aluminum garnet (Yb:YAG) laser. For an absorbed pump power of 1.98 W, the slope efficiency and the optical-to-optical conversion efficiency were 46.9% and 37.9%, respectively. The absorption efficiency was 82.0%. An average output power of 748 mW and a pulse energy of 15μJ were obtained with a pulse repetition rate of 50 kHz. The pulse width was 10 ns. To our knowledge, these efficiencies are the highest values for single-emitter LD-pumped nanosecond pulse lasers as well as for LD-pumped cavity-dumped lasers without direct pumping with a pulse width of less than or equal to 10 ns. Keywords solid-state lasers, diode-pumped, ytterbium, cavity-dumped, high-efficiency
Laser-diode pumped heavy-doped Yb:YAG ceramic lasers
Optics Letters, 2007
Laser performance of heavy-doped Yb:YAG ceramics was investigated using a two-pass pumping miniature laser configuration. Slope efficiency of 52% and optical-to-optical efficiency of 48% have been achieved for 1-mm-thick YAG ceramic doped with 20 at. % ytterbium ions. Laser spectra of Yb:YAG ceramic and singlecrystal lasers were addressed under different intracavity laser intensities. Heavy-doped Yb:YAG ceramic is more suitable for a thin disk laser than a single-crystal with the same Yb 3+ -ion lasants.
Crystals
In this paper, Er:Y2O3 optical ceramics were fabricated and details of the synthesis were presented. The spectral–luminescent properties of Er3+:Y2O3 optical ceramics were investigated. The absorption and emission cross-section spectra were determined. The luminescence kinetics at near 1.6 µm was single exponential and the lifetime of erbium 4I13/2 energy level was determined. In the frame of the conventional Judd–Ofelt theory, the emission properties of the energy levels of erbium 4I13/2 and 4I11/2 involved in laser operation at near 1.6 µm were calculated. The gain coefficient curves for typical values of the relative population of the upper laser level 4I13/2 were presented. The composition and structure were studied using the SEM, XRD, FTIR spectroscopy, and X-ray computer tomography techniques.