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Broadband mid‐infrared emission from Cr 2+ in crystal‐in‐glass composite glasses by Hot Uniaxial Pressing
Author(s) -
Xia Kelun,
Liu Zijun,
Yuan Yuan,
Chen Hua,
Gan Haotian,
Dai Shixun,
Wang Xunsi,
Xianghua Zhang,
Wang Rongping
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16538
Subject(s) - materials science , composite number , chalcogenide , chalcogenide glass , doping , scanning electron microscope , infrared , refractive index , transmittance , sintering , crystal (programming language) , hot pressing , composite material , optics , optoelectronics , physics , computer science , programming language
Abstract Cr 2+ ‐doped II‐VI crystals have witnessed an excellent gain media for continuously tunable and femtosecond‐pulsed lasers. Despite this, major challenges persist toward realizing ultrabroad emission bandwidth and efficient Cr 2+ ‐doped fiber due to the valence diversity of Cr, especially in chalcogenide glasses. Here, we propose to prepare Cr 2+ :ZnSe/As 2 S 3‐x Se x composite glasses by Hot Uniaxial Pressing (HUP), a method that sinters uniformly mixed crystal and glass powders into geometrically designed composite chalcogenide glasses. The densification of the composite glasses reached 99.88%, indicating that a few or none pores remain. Our research shows that Cr 2+ :ZnSe crystals have good performance in chalcogenide glasses, and the composite glasses have the potential to be made into mid‐infrared–doped fibers. It was demonstrated by scanning electron microscopy (SEM) and X‐ray diffraction (XRD) that the composite glasses have a uniform Cr 2+ :ZnSe distribution and no crystal disintegration. The transmittance of the composite glasses was significantly improved by tailoring the refraction index. The mid‐infrared (MIR) fluorescence and decay of the glasses were measured. The lattice constant was measured, calculated, and discussed to reveal the influence of sintering process on lifetime.