【摘 要】
：
Large-size (φ =5mm) and good homogeneity (refractive index fluctuation △n < 2× 10-4) Yb3+-doped Al2O3-SiO2 and Al2O3-P2O5-SiO2 core glasses were prepared by sol-gel method.Their optical properties wer
【机 构】
：
Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, C
【出 处】
：
第七届中国功能玻璃学术研讨会暨新型光电子材料国际论坛
论文部分内容阅读
Large-size (φ =5mm) and good homogeneity (refractive index fluctuation △n < 2× 10-4) Yb3+-doped Al2O3-SiO2 and Al2O3-P2O5-SiO2 core glasses were prepared by sol-gel method.Their optical properties were evaluated.It was found out that the addition of Al3+ or p5+ ions had a great influence on the redox state of ytterbium ions.With increasing Al3+ ions content in these silica glasses, more trivalent Yb3+ ions were reduced to divalent Yb2+.On the contrary, the increase of p5+ ions content greatly promoted divalent Yb2+ ions to be oxidized into trivalent Yb3+.The possible redox mechanisms have been explored and discussed in detail.Both large mode area double cladding fiber (LMA DCF) with core diameter of 48μm and large mode area photonic crystal fiber (LMA PCF) with core diameter of 90μm were prepared from these core glasses.81 W laser power with a slope efficiency of 70.8% was achieved from Yb3+-doped Al2O3-SiO2 LMA PCF.And the few-mode fiber with good beam quality (M2 =1.4) was achieved from Yb3+-doped Al2O3-P2Os-SiO2 LMA PCF.The transmission loss at 1200 nm is 0.4 dB/m.
其他文献
模场直径超过30μm的大模场光纤可用于实现高功率单模激光输出,具有重要的军事和工业应用价值.无论是大模场双包层光纤,还是大模场PCF光纤,其制备往往需要折射率与纯石英玻璃几近相同且直径超过2mm的掺镱芯棒.众所周知,稀土离子的引入会导致纤芯玻璃的折射率升高,如何实现对掺杂纤芯玻璃的折射率调控是大模场光纤制备的一项重要研究内容.本文基于sol-gel法结合高温烧结工艺,将氟、磷引入到掺Yb石英纤芯玻
The Tb3+ single-doped and Tb3+-Yb3+ co-doped glass ceramics with the precipitation of CaF2, CaF2-SrF2 solid state solution and SrF2 nanocrystals were designed and prepared by taking different amount o
Up-conversion luminescence of rare earth (RE) doped NaxGdyFx+3y glass-ceramics have become a meaningful subject due to their potential applications many fields.These RE fluorides glass-ceramics combin
Generally, Te based compositions are designed for optimal phase change materials for optical or electric storage of numerical data due to their strong tendency to crystallize.In another aspect, due to
Compared with powdered phosphors used for LEDs, transparent glasses exhibit many advantages, such as lower production cost, better thermal stability,epoxy-resin-free assembly process, and wide range f
Bi-doped glasses have gained considerable attention due to its broadband and tunable near-infrared (NIR) emission in the range of 1000-1700 nm, which make it a promising material for application in br
用高温熔融法制备了Tm2O3掺杂浓度为0.25、0.5、0.75、1、1.25、1.5mol％的40GeO2-35TeO2-15 PbO-5Al2O3-5 RO(R=Ca、Sr)锗碲酸盐玻璃.DSC结果表明该玻璃的转变温度为446℃,没有析晶峰.玻璃的最大声子能量为～750cm-1.利用Judd-Ofelt理论计算了Tm3+的J-O参数Ωt(t=2,4,6)、不同浓度下Tm3+离子各激发态能级的自
Spectral modifications from visible sunlight to near-infrared emission have been studied extensively to improve the conversion efficiency of crystalline silicon solar cell [1, 2].In this study, transp
Q-switching lasing at ~1860 nm in Tm3+-doped tellurite fiber by using carbon nanotube saturable absorber is reported.Yb3+/Er3+ co-doped silica fiber laser operating at 1590 nm was used as an in-band p
Micro-fabrication in transparent materials by femtosecond laser has become a hot research spot in the past decade.Nanogratings fabricated inside glasses have showed great potentials in microfluidics a