超紧凑抛物线形硅基光模斑转换器  

Ultra-compact Parabolic Silicon Based Optical Mode-spot Converter

作　　者：袁博 姜浩 刘艺林 张赞允[1,2] YUAN Bo;JIANG Hao;LIU Yilin;ZHANG Zanyun(School of Electronics and Information Engineering,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学电子与信息工程学院,天津西青300387 [2]天津工业大学天津市光电检测技术与系统重点实验室,天津西青300387

出　　处：《聊城大学学报（自然科学版）》2024年第1期1-8,共8页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(61974099,62022081)资助。

摘　　要：在集成光路中,光模斑转换器可实现两个截面尺寸不同的光波导器件之间的绝热光传输,对于降低光链路损耗具有重要作用。在硅基光电子芯片中,硅基光模斑转换器通常用来实现单模波导和多模波导之间的连接,常用于光栅耦合器与单模波导之间的模斑转换。由于传统线性模斑转换器尺寸较长,占用了大量宝贵的芯片面积,为实现超紧凑光绝热模斑转换,提出并实验验证了一种新型抛物线形模斑转换器,测试结果显示,该抛物线形模斑转换器在O波段和C波段均工作良好,C波段下,当尺寸长度为54μm和100μm时,光插入损耗分别约为0.25 dB和0.18 dB;O波段下,当尺寸长度为64μm和110μm时,光传输损耗分别为0.25 dB和0.09 dB。测试结果与仿真结果符合良好。In integrated photonic circuits,the optical mode-spot converter can realize the adiabatic optical transmission between two optical waveguide devices with different mode sizes,which plays an important role in reducing the insertion loss of optical link.In silicon photonic chips,silicon optical mode-spot converters are usually used to connect single-mode waveguides and multimode waveguides,and the most common application is the interconnect between grating couplers and single-mode waveguides.Due to the large size of the traditional linear mode-spot converter,valuable chip area is wasted.To realize ultra-compact adiabatic mode-spot conversion,a novel parabolic mode-spot converter is proposed and experimentally demonstrated.The test results show that the parabolic mode spot converters work well in O-band and C-band.When the size length is 54μm and 100μm,the optical insertion losses for C-band device are 0.25 dB and 0.18 dB,respectively.When the size length is 64μm and 110μm,the optical insertion losses for O-band device are 0.25 dB and 0.09 dB,respectively.The measurement results agree well with the simulation results.

关 键 词：绝缘体上硅 硅光波导 抛物线形模斑转换器 

分 类 号：TN256[电子电信—物理电子学]