Abstract
The undoped and the Nd3+:KBaGd(WO4)3 crystals were grown by the top seeded solution growth (TSSG) method from a flux of K2W2O7. The structure of the pure crystal was determined by the single-crystal X-ray diffraction method. It crystallizes in the monoclinic symmetry with space group C2/c. In the structure, K+ and Ba2+ ions share the same 8f site with occupancy of 0.464 and 0.536, respectively. The investigation of spectral properties of Nd3+:KBaGd(WO4)3 crystal indicates that it exhibits broad absorption and emission bands, which are attributed to locally disordered environments around the Nd3+ centers. The broad absorption band is suitable for diode laser pumping.
Highlights
The diode-laser pumped solid-state lasers are useful in a wide variety of applications in the fields of military [1,2], industry [3] and medical treatments [4] due to their advantages, such as outstanding stability, high efficiency, compact size and long lifetime
1.differential scanning calorimetry (DSC) Analysis and Crystal Growth The DSC result reveals that the undoped KBaGd(WO4)3 crystal melts incongruently (Fig. 4)
4.Conclusion The 3.08 at% Nd3+-doped KBaGd(WO4)3 crystal was successfully grown by the top seeded solution growth (TSSG) method
Summary
The diode-laser pumped solid-state lasers are useful in a wide variety of applications in the fields of military [1,2], industry [3] and medical treatments [4] due to their advantages, such as outstanding stability, high efficiency, compact size and long lifetime. A lot of well-known Nd3+-doped laser crystals (Nd:YAG, for example [5]) are commercially available, they can be hardly pumped with diode-lasers Because they have very narrow absorption bands near their pumped wavelength compared to the emission bandwidths of common diode-lasers (several nanometers), they cannot absorb the pump energy of diode-lasers efficiently. In the past few years, there have been a lot of studies on the family of scheelite-related disordered molybdate and tungstate crystals AT(XO4) (A = monovalent Li, Na; T = trivalent Bi, Y, La-Lu; X = Mo, W) [8,9,10] These disordered crystals have been demonstrated as promising materials in the domains of tunable and ultrashort femto-second laser pulse due to the obvious advantage of large spectral broadening. This paper reports on the growth, structure and spectral properties of Nd3+-doped KBaGd(WO4) crystal
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