针对目前硅基光电子芯片缺失片上光源这一问题,设计了一种基于波导倏逝耦合的硅基片上量子点激光器。整体结构基于绝缘体上硅(Silicon on Insulator,SOI)平台引入倏逝波耦合结构来完成量子点增益芯片和波导间的耦合,利用布拉格光栅形成...针对目前硅基光电子芯片缺失片上光源这一问题,设计了一种基于波导倏逝耦合的硅基片上量子点激光器。整体结构基于绝缘体上硅(Silicon on Insulator,SOI)平台引入倏逝波耦合结构来完成量子点增益芯片和波导间的耦合,利用布拉格光栅形成激光腔体来完成光放大和波长选择功能。通过Lumerical仿真软件对O波段硅基片上光源的锥形(taper)耦合器结构和布拉格光栅结构进行了优化。结果表明,长142μm的锥形耦合器具有最高的耦合效率;长于30μm的锥形光斑塑形波导可以使光束以更低损耗在片上传输;优化后的布拉格光栅在波导两端的长度为110μm和240μm,分别实现了40%和90%的反射率。两段布拉格光栅形成谐振腔,放大并选择出1.31μm波长。文中设计显著提高了硅基片上光源整体的发光效率并降低了成本,实现了超过98%的耦合效率,且与CMOS(Complementary Metal Oxide Semiconductor)工艺兼容。相关研究结果可为后续工艺设计和实验验证提供数据支持。展开更多
In order to meet the urgent need of infrared search and track applications for accurate identification and positioning of infrared guidance aircraft,an active-detection mid-wave infrared search and track system(ADMWIR...In order to meet the urgent need of infrared search and track applications for accurate identification and positioning of infrared guidance aircraft,an active-detection mid-wave infrared search and track system(ADMWIRSTS)based on"cat-eye effect"was developed.The ADMWIRSTS mainly consists of both a light beam control subsystem and an infrared search and track subsystem.The light beam control subsystem uses an integrated opto-mechanical two-dimensional pointing mirror to realize the control function of the azimuth and pitch directions of the system,which can cover the whole airspace range of 360°×90°.The infrared search and track subsystem uses two mid-wave infrared cooled 640×512 focal plane detectors for co-aperture beam expanding,infrared and illumination laser beam combining,infrared search,and two-stage track opto-mechanical design.In this work,the system integration design and structural finite-element analysis were conducted,the search imaging and two-stage track imaging for external scenes were performed,and the active-detection technologies were experimentally verified in the laboratory.The experimental investigation results show that the system can realize the infrared search and track imaging,and the accurate identification and positioning of the mid-wave infrared guidance,or infrared detection system through the echo of the illumination laser.The aforementioned work has important technical significance and practical application value for the development of compactly-integrated high-precision infrared search and track,and laser suppression system,and has broad application prospects in the protection of equipment,assets and infrastructures.展开更多
文摘针对目前硅基光电子芯片缺失片上光源这一问题,设计了一种基于波导倏逝耦合的硅基片上量子点激光器。整体结构基于绝缘体上硅(Silicon on Insulator,SOI)平台引入倏逝波耦合结构来完成量子点增益芯片和波导间的耦合,利用布拉格光栅形成激光腔体来完成光放大和波长选择功能。通过Lumerical仿真软件对O波段硅基片上光源的锥形(taper)耦合器结构和布拉格光栅结构进行了优化。结果表明,长142μm的锥形耦合器具有最高的耦合效率;长于30μm的锥形光斑塑形波导可以使光束以更低损耗在片上传输;优化后的布拉格光栅在波导两端的长度为110μm和240μm,分别实现了40%和90%的反射率。两段布拉格光栅形成谐振腔,放大并选择出1.31μm波长。文中设计显著提高了硅基片上光源整体的发光效率并降低了成本,实现了超过98%的耦合效率,且与CMOS(Complementary Metal Oxide Semiconductor)工艺兼容。相关研究结果可为后续工艺设计和实验验证提供数据支持。
基金Supported by the Fundamental Scientific Research Plan of China(JCKY2021130B033)。
文摘In order to meet the urgent need of infrared search and track applications for accurate identification and positioning of infrared guidance aircraft,an active-detection mid-wave infrared search and track system(ADMWIRSTS)based on"cat-eye effect"was developed.The ADMWIRSTS mainly consists of both a light beam control subsystem and an infrared search and track subsystem.The light beam control subsystem uses an integrated opto-mechanical two-dimensional pointing mirror to realize the control function of the azimuth and pitch directions of the system,which can cover the whole airspace range of 360°×90°.The infrared search and track subsystem uses two mid-wave infrared cooled 640×512 focal plane detectors for co-aperture beam expanding,infrared and illumination laser beam combining,infrared search,and two-stage track opto-mechanical design.In this work,the system integration design and structural finite-element analysis were conducted,the search imaging and two-stage track imaging for external scenes were performed,and the active-detection technologies were experimentally verified in the laboratory.The experimental investigation results show that the system can realize the infrared search and track imaging,and the accurate identification and positioning of the mid-wave infrared guidance,or infrared detection system through the echo of the illumination laser.The aforementioned work has important technical significance and practical application value for the development of compactly-integrated high-precision infrared search and track,and laser suppression system,and has broad application prospects in the protection of equipment,assets and infrastructures.
