基于新型含氯光热敏折变玻璃的全息体光栅制备和性能  

Preparation and Performance of Holographic Grating Based on Novel Chlorine-Containing Photothermal Refractive Glass

作　　者：闫运浩 柴聪鹏 郭凌伟[3] 华有杰[1,2] 徐时清[1,2] 赵士龙[1,2] YAN Yunhao;CHAI Congpeng;GUO Lingwei;HUA Youjie;XU Shiqing;ZHAO Shilong(Institute of Optoelectronic Materials and Devices,China Jiliang University,Hangzhou 310018,China;Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province,China Jiliang University,Hangzhou 310018,China;School of Electronics and Information Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]中国计量大学光电材料与器件研究院,杭州310018 [2]中国计量大学浙江省光电材料与器件重点实验室,杭州310018 [3]杭州电子科技大学电子信息学院,杭州310018

出　　处：《硅酸盐学报》2024年第8期2509-2516,共8页Journal of The Chinese Ceramic Society

基　　金：浙江省自然科学基金(LZ21F050001,LY23A040007);国家自然科学基金(12174360)。

摘　　要：体Bragg光栅是实现半导体激光器超窄线宽激光输出的核心元件。采用高温熔融法制备了一种玻璃体系为SiO_(2)-Na_(2)O-Al_(2)O_(3)-ZnO(F^(–)、Cl^(–))的新型含氯光热敏折变玻璃(PTR glass)。结果表明:在含氯PTR玻璃中析出了NaF纳米晶,并测得晶粒大小为5 nm,玻璃保持很高的透明度。Cl^(–)的引入使得PTR玻璃的等离子体吸收峰由450 nm蓝移至413 nm,为开发低吸收损耗的可见和近红外光范围元器件提供了更大可能。采用全息曝光和分步热处理工艺制得衍射效率为67.95%、半高全宽仅为0.057 nm的1.5μm超窄线宽体Bragg光栅。Introduction With the continuous development of laser technology,ultra-narrow linewidth lasers show important application prospects in many fields.However,the output linewidth of conventional semiconductor laser chips is usually large,which cannot meet the practical application requirements.Therefore,it is of great significance to study the key technologies for preparing ultra-narrow linewidth lasers.As a new type of optical component,volume Bragg grating,with the advantages of tunable diffraction wavelength,stable laser wavelength,and narrow linewidth,has become an effective way to solve this problem.This work tried to prepare 1.5μm volume Bragg grating(VBG)based on chlorine-containing PTR glass to meet the demand for ultra-narrow linewidth lasers in the fields of new generation of coherent laser communication,LIDAR,and high-precision fiber sensing.Methods The glass samples were prepared as long strips with a diameter of 5 mm and a length of 28 mm.The thermal expansion was recorded by warming the glass samples from room temperature to 800℃at a rate of 10℃/min using a DIL 402PC/4 high-temperature thermal expansion meter from NETZSCH,Germany.The samples of chlorine-containing PTR glass before and after exposure were also tested by differential thermal analysis using a Q600SDT integrated thermal analyser from TA Instruments,USA.This is an important parameter to understand the dimensional stability of the glass during temperature change.A D2 PHASER type X-ray diffractometer from Bruker,Germany was used to analyze the changes in crystal structure of chlorine containing PTR glass before and after exposure,nucleation and precipitation heat treatment to understand the structural evolution and property changes of the material.A Lambda 750S UV-Vis-NIR spectrophotometer from Perkin Elmer,USA was used to study the optical absorption properties of chlorine-containing PTR glass before and after exposure,nucleation and decrystallisation heat treatments,and to understand its absorption capacity at different wavelengths.The

关 键 词：光热敏折变玻璃 体Bragg光栅 超窄线宽 半导体激光器 

分 类 号：TN248.4[电子电信—物理电子学]