【摘 要】
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Ag nanoparticles(NPs)were introduced into Er3+/Tm3+codoped tellurite glasses prepared using melt-quenching and heat-treated techniques.The glass samples were ch
【机 构】
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College of Information Science and Engineering,Ningbo University,Ningbo 315211,China
论文部分内容阅读
Ag nanoparticles(NPs)were introduced into Er3+/Tm3+codoped tellurite glasses prepared using melt-quenching and heat-treated techniques.The glass samples were characterized by the differential scanning calorimeter(DSC),X-ray diffraction(XRD),transmission electron microscopy(TEM)and photoluminescence to reveal the Ag NPs induced broadband near-infrared band emission enhancement of Er3/Tm3+ions.The studied glasses possessed good thermal stability with AT larger than 137 ℃.For glass sample heat-treated at 360 ℃ for 6h,the nucleated Ag NPs in near-spherical shape with an average diameter about 6.5 nm dispersed in the glass matrix.Under the excitation of 808 nm laser diode(LD),the broadband near-infrared fluorescence emission extending from 1 350 nm to 1 620 nm,owing to the combined contributions from the 3H4→3F4 transition of Tm3+at 1.47 pm band and the 41 13/2→4115/2 transi-tion of Er3+at 1.53 pm band,improved significantly with the introduction of Ag NPs,which is mainly attributed to the increased local electric field.The present results indicate that Er3+/Tm3+/Ag NPs codoped tellurite glass with good thermal stability is a promising glass material for broadband fiber amplifiers of WDM transmission systems.
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