一种宽带直接调制型激光器的设计方法  

A Design Method for Broadband Direct Modulation Laser

作　　者：杨鹏毅 李韬 姚宗影 YANG Pengyi;LI Tao;YAO Zongying(Anhui Province Key Laboratory of Microsystem,The 43rd Research Institute of China Electronics Technology Group Corporation,Hefei Anhui 230088,China;The 43rd Research Institute of China Electronics Technology Group Corporation,Hefei Anhui 230088,China)

机构地区：[1]中国电子科技集团公司第四十三研究所安徽省微系统重点实验室,安徽合肥230088 [2]中国电子科技集团公司第四十三研究所,安徽合肥230088

出　　处：《现代雷达》2025年第2期117-121,共5页Modern Radar

摘　　要：针对直接调制型激光器输出光功率低、带宽小等技术问题,提出了一种宽带直接调制型激光器的设计方法,给出了直接调制型激光器的设计原理以及内部结构。通过光学仿真软件,对比分析了准直透镜和聚焦透镜对光路耦合效率的影响。仿真结果显示,准直透镜径向微小位移会显著影响耦合效率,进而影响激光器输出光功率的大小,而相比准直透镜,聚焦透镜径向偏移对耦合效率的影响则较小。通过微波仿真软件,对宽频带激光器的阻抗匹配进行了设计仿真,并对其核心指标进行了测试。测试结果表明,文中设计的宽带直接调制型激光器的3 dB带宽、输出光功率、插损、噪声系数分别为18 GHz、10.5 dBm、-25 dB、 45 dB,达到了国际同类产品水平。Aiming at the technical problems of low output optical power and small bandwidth of direct modulation laser,a design method for broadband direct modulation laser is proposed,and the design principle and internal structure of direct modulation laser are also presented.The effects of collimator lens and focusing lens on optical coupling efficiency are compared and analyzed by optical simulation software,the simulation results show that the coupling efficiency will be significantly affected by the small radial displacement of the collimating lens,which in turn affects the output optical power of the laser.Compared to collimating lens,the coupling efficiency is less affected by the radial offset of the focusing lens.The impedance matching of a broadband laser is designed and simulated using microwave simulation software,and the key indicators are also tested.The test results show that 3 dB bandwidth,output optical power,insertion loss,and noise figure of the designed broadband direct modulation laser are 18 GHz,10.5 dBm,-25 dB,and 45 dB respectively,reaching the international level of similar products.

关 键 词：激光器 直接调制型激光器 宽频带 光学仿真 微波光子 

分 类 号：TN248.4[电子电信—物理电子学]