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Crystal growth, structure and characterization of Er 6 B 4 O 15 as self‐activated eye‐safe laser material within the near‐infrared waveband
Author(s) -
Wang Yan,
Zhang Wei,
Li Ziyi,
Li Jianfu,
Zhu Zhaojie,
You Zhenyu,
Tu Chaoyang
Publication year - 2018
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
ISSN - 2052-5206
DOI - 10.1107/s2052520618001488
Subject(s) - full width at half maximum , crystal (programming language) , materials science , laser , analytical chemistry (journal) , absorption (acoustics) , infrared , fluorescence , single crystal , absorption spectroscopy , optics , optoelectronics , crystallography , chemistry , physics , chromatography , computer science , composite material , programming language
A new rare‐earth borate Er 6 B 4 O 15 was synthesized by a solid‐state reaction technique. The crystal was obtained by a flux method. Single‐crystal X‐ray diffraction analysis revealed that the crystal structure is composed of ErO 6 polyhedra sharing edges and BO 3 groups. The absorption, near‐infrared fluorescence spectra and the fluorescence decay curve of Er: 4 I 13/2 energy level in the Er 6 B 4 O 15 crystal were measured at room temperature. The absorption peak was located at 977 nm with absorption cross section of 1.16 × 10 −21 cm 2 and a full width at half‐maximum (FWHM) of 16 nm, which is very suitable for commercial 980 nm laser diode pumping. A maximum emission peak at 1560 mm with a broad FWHM of 64 nm was observed in this crystal because of the Er 3+ transition 4 I 13/2 → 4 I 15/2 , while the emission cross section was calculated to be 8.53 × 10 −20 cm 2 . These results imply that the Er 6 B 4 O 15 crystal is a promising candidate material for the achievement of an eye‐safe near‐infrared wavelength laser.