回音壁模式晶体腔的高精度耦合封装技术研究  

High-Precision Coupling and Packaging Technology for Whispering Gallery Mode Crystal Cavity

作　　者：姚佳成 尚俊杰 刘松嘉 潘科 李阜徽 崔索超[1] 王晨晟[1] YAO Jia-cheng;SHANG Jun-jie;LIU Song-jia;PAN Ke;LI Fu-hui;CUI Suo-chao;WANG Chen-sheng(Huazhong Institute of Electro-Optics-Wuhan National Laboratory for Optoelectronics,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所-武汉光电国家研究中心,湖北武汉430223

出　　处：《光学与光电技术》2023年第2期93-100,共8页Optics & Optoelectronic Technology

基　　金：国家自然科学青年基金(42204182)资助项目。

摘　　要：回音壁模式晶体腔凭借其高品质因数和小模式体积,在光学滤波、非线性转换、光学传感等研究领域都具有重要的应用前景,然而裸露光学微腔的谐振特性极易受外界环境干扰的影响,针对基于氟化镁晶体回音壁模式微腔的光纤耦合封装技术进行了研究。通过氢氧焰熔融拉锥的方式制备了锥形光纤,其锥腰直径约为2μm。搭建了回音壁微腔与锥形光纤耦合测试实验平台,优化后的锥形光纤耦合系统使回音壁模式晶体腔在一定波长范围内工作在少模状态,品质因数达到5.15×10^(7)。此外,完成了具有精准温控的耦合器件封装,提升了锥形光纤和回音壁腔耦合系统的稳定性。从实际应用的角度出发,为超高品质因数的回音壁模式晶体腔的封装提供了一种有益的尝试。The whispering gallery mode(WGM)crystal cavity with a high quality factor and small mode volume has an important application prospect in the fields of optical filters,nonlinear converters,optical sensors and so on.However,the resonant characteristics of exposed optical microcavities are easily influenced by the external environment.In this paper,the coupling and packaging technology of the tapered fiber and the WGM micro-cavity based on the magnesium fluoride crystal is studied.The tapered fiber is prepared by oxyhydrogen flame,and the diameter of the taper waist is about 2μm.An experimental platform for testing the coupling quality between micro-cavity and tapered fiber is set up.Only a few modes in a specific wavelength range are observed in the optimized the fiber coupling system,and the quality factor reaches 5.15×10^(7).Furthermore,a coupling and packaging system with accurate temperature control is built to improve the stability of the coupling system.A useful idea is provided and realized for packaging ultra-high quality WGM crystal cavities from the perspective of practical application.

关 键 词：回音壁模式 光学微腔 品质因数 锥形光纤耦合 封装器件 

分 类 号：TN24[电子电信—物理电子学]