针对串馈功率分配器传统设计中场景适配效率低、手动建模耗时长的问题,提出基于图形用户界面(Graphic User Interface,GUI)与Python-HFSS的串馈式微带功率分配器自动设计方法。通过GUI输入中心频率、功率比等核心参数,结合逐级功率叠加...针对串馈功率分配器传统设计中场景适配效率低、手动建模耗时长的问题,提出基于图形用户界面(Graphic User Interface,GUI)与Python-HFSS的串馈式微带功率分配器自动设计方法。通过GUI输入中心频率、功率比等核心参数,结合逐级功率叠加-阻抗迭代匹配逻辑计算微带线参数,进而调用HFSS脚本完成自动建模与仿真。以1.45GHz六级功率分配器为实例验证,结果显示参数计算耗时约0.01s,3D建模耗时约9.80s,全流程效率显著优于传统方法;且输出端口功率精度与相位一致性均满足工程要求,可有效解决传统设计痛点,适用于天线阵列等场景,具备工程应用价值。展开更多
3-dB couplers are key building blocks for on-chip optical switches,optical phased arrays,and photonic computing applications,for the ease of realizing balanced beam splitting and combining.Adiabatic3-dB couplers ensur...3-dB couplers are key building blocks for on-chip optical switches,optical phased arrays,and photonic computing applications,for the ease of realizing balanced beam splitting and combining.Adiabatic3-dB couplers ensure exclusive excitation and propagation of the fundamental eigenmode along the waveguide,characterized by low insertion loss,broad bandwidth,low power imbalance,and resilience to fabrication variations.However,conventional adiabatic designs need to extend the propagation length to achieve broadband performance.In this paper,we overcome such a length-bandwidth trade-off by employing fast quasi-adiabatic(FAQUAD)dynamics in the TFLN 3-dB couplers,thereby accelerating the mode evolution process.Theoretical analysis predicts that the proposed 2×2 FAQUAD 3-dB coupler exhibits an unprecedented operation bandwidth of 350 nm(1285 to 1635 nm)with a FAQUAD taper length of only 88.9μm.Experimental characterization of the fabricated device demonstrates broadband 3-dB power splitting over 165 nm(exceeding the range of the used tunable laser:1470 to 1635 nm),achieving the power imbalance of<0.5 dB and insertion loss of 0.14 dB.Those results establish the foundation for next-generation photonic integrated circuits featuring high efficiency,compact footprint,and ultra-wide bandwidth.展开更多
文摘针对串馈功率分配器传统设计中场景适配效率低、手动建模耗时长的问题,提出基于图形用户界面(Graphic User Interface,GUI)与Python-HFSS的串馈式微带功率分配器自动设计方法。通过GUI输入中心频率、功率比等核心参数,结合逐级功率叠加-阻抗迭代匹配逻辑计算微带线参数,进而调用HFSS脚本完成自动建模与仿真。以1.45GHz六级功率分配器为实例验证,结果显示参数计算耗时约0.01s,3D建模耗时约9.80s,全流程效率显著优于传统方法;且输出端口功率精度与相位一致性均满足工程要求,可有效解决传统设计痛点,适用于天线阵列等场景,具备工程应用价值。
基金supported by the National Key Research and Development Program of China(Grant No.2024YFB2807903)the National Natural Science Foundation of China(Grant Nos.62025502 and 62475050)the Guangdong Introducing Innovative and Entrepreneurial Teams of“The Pearl River Talent Recruitment Program”(Grant No.2021ZT09X044)。
文摘3-dB couplers are key building blocks for on-chip optical switches,optical phased arrays,and photonic computing applications,for the ease of realizing balanced beam splitting and combining.Adiabatic3-dB couplers ensure exclusive excitation and propagation of the fundamental eigenmode along the waveguide,characterized by low insertion loss,broad bandwidth,low power imbalance,and resilience to fabrication variations.However,conventional adiabatic designs need to extend the propagation length to achieve broadband performance.In this paper,we overcome such a length-bandwidth trade-off by employing fast quasi-adiabatic(FAQUAD)dynamics in the TFLN 3-dB couplers,thereby accelerating the mode evolution process.Theoretical analysis predicts that the proposed 2×2 FAQUAD 3-dB coupler exhibits an unprecedented operation bandwidth of 350 nm(1285 to 1635 nm)with a FAQUAD taper length of only 88.9μm.Experimental characterization of the fabricated device demonstrates broadband 3-dB power splitting over 165 nm(exceeding the range of the used tunable laser:1470 to 1635 nm),achieving the power imbalance of<0.5 dB and insertion loss of 0.14 dB.Those results establish the foundation for next-generation photonic integrated circuits featuring high efficiency,compact footprint,and ultra-wide bandwidth.
