Journal
CHEMISTRY OF MATERIALS
Volume 35, Issue 2, Pages 739-746Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.2c03533
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By investigating the relationship between structure and optical properties, the Nd3+-doped La2CaB8O16 crystal with a long rare-earth ion distance more than 4.27 angstrom was found to allow a high doping concentration and exhibit a weak fluorescence quenching effect. Nd3+-doped La2CaB8O16 crystals with different concentrations were successfully grown by the top seeded solution growth method, showing large size, high optical quality, strong absorption band at 800 nm, and a fluorescence band at 1055 nm. A diode-pumped orthogonally polarized dual-wavelength laser operation at 1052 and 1055 nm was realized, with a slope efficiency of 16.3% and output power of 859 mW. The Nd3+-doped La2CaB8O16 crystal is a promising laser gain medium for 1 μm lasers and possible generation of terahertz radiation.
The Nd3+-based laser crystal is one of the key gain media for all-solid-state laser technology. Herein, by investigating the relationship between structure and optical properties, we found that a La-containing borate, La2CaB8O16, with a long rare-earth ion distance more than 4.27 angstrom, allows a high doping concentration and exhibits a weak fluorescence quenching effect. For the first time, Nd3+-doped La2CaB8O16 crystals with different concentrations were grown by the top seeded solution growth method with large size and high optical quality. Its spectral characters were measured, suggesting a strong absorption band at 800 nm and a fluorescence band at 1055 nm. Furthermore, a diode-pumped orthogonally polarized dual-wavelength laser operation at 1052 and 1055 nm was realized, with a slope efficiency of 16.3% and output power of 859 mW. These results suggest that the Nd3+-doped La2CaB8O16 crystal is a promising laser gain medium for 1 mu m lasers and possible generation of terahertz radiation.
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