功率分配比大范围可调的光功率分配器集成芯片  

Optical Power Splitter Integrated Chip with Large Tunable Range of Power Splitting Ratio

作　　者：廖莎莎 廖柯 包航 张甜甜 刘继伟 廖希 Liao Shasha;Liao Ke;Bao Hang;Zhang Tiantian;Liu Jiwei;Liao Xi(School of Communication and Information Engineering,Chongqing University of Posts and Telecommwmications,Chongqing 400065,China;State Key Laboratory of Millimeter Waves,Southeast University,Nanjing,Jiangsu 211189,China;Chongqing Acoustic-Optic-Electronic CO.,Ltd.,Chongqing,400060,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]东南大学毫米波国家重点实验室,江苏南京211189 [3]重庆声光电有限公司,重庆400060

出　　处：《光学学报》2021年第6期198-205,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61801063);重庆市教育委员会科学技术研究项目(KJQN201800605);重庆市自然科学基金面上项目(cstc2019jcyj-msxmX0597);东南大学毫米波国家重点实验室开放课题(K202005)。

摘　　要：光功率分配器(OPS)是光子集成电路的基本元件之一,广泛应用于多种领域。功率分配比(PSR)可调的OPS可提高光子集成电路的灵活性,简化光子集成电路系统。提出了一种硅基PSR大范围可调的OPS集成芯片方案,通过将对称2×2多模干涉仪、波导光栅和狭缝结构等硅基器件结合在一起,并改变输入光信号的波长和微型热光调制器两端加载的电压,实现了大范围可调的PSR。实验结果表明,本方案得到的两种OPS结构可分别在6.72 nm和5.56 nm波长范围内实现0.51~36.91和0.88~230.46的PSR变化;在50℃的温度变化下,可实现8.58~29.75和5.01~425.43的PSR变化。且该OPS具有尺寸小、质量轻、灵活性高等优势,可广泛应用于光开关、信道划分、功率分配等通信和信号处理领域。Optical power splitter(OPS) is one of the basic components in photonic integrated circuits and it is widely used in many fields. The OPS with tunable power splitting ratio(PSR) can enhance the flexibility of photonic integrated circuits and simplify the photonic integrated circuit system. We propose an integrated chip scheme Si-based OPS with large tunable range of PSR. The scheme combines Si-based devices such as a symmetric 2×2 multimode interferometer, a waveguide grating, and a slot structure. By varying the wavelength of the input signal and adjusting the voltages applied at both ends of the thermo-optic micro modulator, the wide range adjustable PSR is realized. Experimental results show that the two OPS structure can obtain PSR changes 0.51--36.91 and 0.88--230.46 respectively within the wavelength range of 6.72 nm and 5.56 nm, respectively, and PSR changes of 8.58--29.75 and 5.01--425.43 in the temperature changes by 50 ℃. The OPS has the advantages of small size, light weight, and high flexibility, which can be widely used in optical switch, channel division, power distribution and other communication and signal processing fields.

关 键 词：集成光学 分光器 全光器件 硅光子学 光子集成电路 

分 类 号：TN256[电子电信—物理电子学]