低散射中长波As_(2)Se_(3)玻璃的制备与性能  

Preparation and Performance of Low-Scattering Mid-to-Long Wave Infrared As_(2)Se_(3)Glass

作　　者：方沁楠 王煜泽 樊智超 王雨杨 朱合盼 白胜闯 刘永兴[1,2] 王训四 FANG Qinnan;WANG Yuze;FAN Zhichao;WANG Yuyang;ZHU Hepan;BAI Shengchuang;LIU Yongxing;WANG Xunsi(Laboratory of Infrared Materials and Devices,Research Institute of Advanced Technology,College of Information,Ningbo University,Ningbo 315211,Zhejiang,China;Zhejiang Key Laboratory of Photoelectric Materials and Devices,Ningbo 315211,Zhejiang,China)

机构地区：[1]宁波大学信息科学与工程学院,高等技术研究院,红外材料与器件实验室,浙江宁波315211 [2]浙江省光电探测材料及器件重点实验室,浙江宁波315211

出　　处：《硅酸盐学报》2024年第9期3012-3018,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(U22A2085,62205163,61875097,61627815,61705091);浙江省万人计划;宁波市自然科学基金(202003N4101);宁波市领军和拔尖人才培养工程择优资助;王宽诚幸福基金课题资助。

摘　　要：颗粒引发的散射是影响玻璃透光性的关键因素之一。在红外硫系玻璃的基础组分中,通常包含单质S或Se。通过在石英安瓿瓶内使用还原金属(Al或Mg)进行提纯,容易引入微米级的金属氧化物颗粒(Al_(2)O_(3)、MgO)或硅杂质。为了深入探究滤网在微米级颗粒滤除方面的效能,通过在主动蒸馏过程中装载不同孔径的过滤网,对比研究了玻璃的光谱和透光率变化情况。研究结果表明,使用10μm孔径滤网过滤后,玻璃的光学透过率接近不考虑任何散射损失的理论透过率——62%;同时,玻璃内的氧杂质(O—H、H_(2)O、Se—O)和异相杂质含量也有了显著下降。在玻璃内部散射降低的前提下,2~20 mm厚度不同的样品之间的透过率差不超过2%,而制备超低散射的As_(2)Se_(3)玻璃需要更小滤网孔径的过滤网。本研究为进一步降低硫系玻璃内部散射,以及制备超低损耗的硫系光纤提供了一种新技术。Introduction Chalcogenide glasses are primarily composed of elements from group VI of the periodic table,such as sulfur,selenium,and tellurium,and may include other non-oxide elements like germanium and arsenic.These glasses exhibit properties such as high refractive index(2-3.5),low phonon energy(<350 cm^(-1)),and tunable performance.As the most popular chalcogenide glasses,As-Se and As-S glasses are widely used in the fields of mid-and far-infrared imaging,supercontinuum generation,infrared laser power transmission,etc.However,the soluble impurity absorption and insoluble particle impurities inside the glass lead to a lot of trouble.In particular,particle-induced Scattering is one of the key factors for the decrease of the glass transmittance.Such particles may be sourced from various conditions,such as the original presence of raw materials and introduction during glass preparation.So,it is urgent to find the real source and remove these impurities.For example,Nguyen et al.prepared As_(2)Se_(3)fiber with the lowest loss below 1 dB/m,but found that there are a large number of submicron particles-Al_(2)SiO_(3)-inside the fiber,which enhances the Scattering loss of the glass.To address this challenge,this work investigated the optical properties of glass by adding deoxidizers and filter sheets to the dynamic distillation process.Methods The glass was prepared using three-stage quartz ampoules.Filters with apertures of 250μm,160μm,100μm and 10μm were added to the multi-stage dynamic distillation process for removing particulate impurities from the glass.Metal Al as a deoxidizer was loaded in the ampoule during the distillation process for removing oxide impurities such as H_(2)O,O—H,etc.After the glass was ground and polished,the particles inside the glass samples were observed using a Dino Capture infrared camera and analyzed in the context of Scattering theory to determine how the particles affect the transmittance of the glass;Then,transmittance maps were plotted to analyze the relationship between partic

关 键 词：硫系玻璃 颗粒散射 异相杂质 超低损耗 三硫化二砷 

分 类 号：O433.4[机械工程—光学工程]