133 research outputs found
Monoclinic Tm^3+:MgWO_4: a promising crystal for continuous-wave and passively Q-switched lasers at ∼2 μm
No full textMonoclinic thulium-doped magnesium monotungstate, Tm3+ :MgWO4, is promising for efficient power-scalable continuous-wave (CW) and passively Q-switched lasers at > 2 mu m. Under diode pumping at 802 nm, a compact CW laser based on Z-cut Tm: MgWO4 generated 3.09 W at 2022-2034 nm with a slope efficiency of 50% which represents the highest output power ever achieved with this type of laser host. Stable passive Q-switching of the Tm: MgWO4 laser is demonstrated for the first time, to the best of our knowledge, using single-walled carbon nanotubes, graphene, and Cr2+:ZnS saturable absorbers. Using the latter, the best performance is achieved with 16.1 mu J/13.6 ns pulses at 2017.8 nm with a maximum average output power of 0.87 W and a peak power of 1.18 kW. (C) 2017 Optical Society of America
Growth, mechanical, thermal and spectral properties of Cr3+:MgMoO4 crystal.
No full textThis paper reports the growth, mechanical, thermal and spectral properties of Cr(3+):MgMoO(4) crystals. The Cr(3+):MgMoO(4) crystals with dimensions up to 30 mm×18 mm×14 mm were obtained by TSSG method. The absorption cross-sections of (4)A(2)→(4)T(1) and (4)A(2)→(4)T(2) transitions are 12.94×10(-20) cm(2) at 493 nm and 7.89×10(-20) cm(2) at 705 nm for E//N(g), respectively. The Cr(3+):MgMoO(4) crystal shows broad band emission extending from 750 nm to 1300 nm with peak at about 705 nm. The emission cross-section with FWHM of 188 nm is 119.88×10(-20) cm(2) at 963 nm for E//N(g). The investigated results showed that the Cr(3+):MgMoO(4) crystal may be regarded as a potential tunable laser gain medium
Structure and spectral properties of Nd3+-doped KBaGd(MoO4)3 crystal with a disorder structure
No full textGrowth, thermal and spectral properties of Er3+-doped and Er3+/Yb3+-codoped Li3Ba2La3(WO4)8 crystals.
No full textThis paper reports the growth and spectral properties of Er(3+)-doped and Er(3+)/Yb(3+)-codoped Li(3)Ba(2)La(3)(WO(4))(8) crystals. The Er(3+): Li(3)Ba(2)La(3)(WO(4))(8) crystal with dimensions of 56 mm × 28 mm × 9 mm and Er(3+)/Yb(3+): Li(3)Ba(2)La(3)(WO(4))(8) crystal with dimensions of 52 mm × 24 mm × 8 mm were obtained by the top-seeded solution growth (TSSG) method. Thermal expansion coefficients and thermal conductivity of both crystals were measured. The spectroscopic characterizations of both crystals were investigated. The spectroscopic analysis reveals that the Er(3+)/Yb(3+): Li(3)Ba(2)La(3)(WO(4))(8) crystal has much better optical properties than the Er(3+): Li(3)Ba(2)La(3)(WO(4))(8) crystal, thus it may become a potential candidate for solid-state laser gain medium material
Front Cover: 3D Graphene Network Encapsulating Mesoporous ZnS Nanospheres as High‐Performance Anode Material in Sodium‐Ion Batteries (ChemElectroChem 12/2018)
No full textGrowth and optical properties of high-quality and large-sized ultraviolet birefrigent crystal of Ba1−Sr B2O4 (x=0.006–0.13) solid solution
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