实现了一种可以对于反射系数进行精确建模的半导体激光器电路模型并且与传统模型进行了比较。在ADS(Advanced Design Systems)中使用了SDD(Symbolic Defined Devices)器件实现,对于速率方程进行了变形以改进模型的收敛性,该模型可用于...实现了一种可以对于反射系数进行精确建模的半导体激光器电路模型并且与传统模型进行了比较。在ADS(Advanced Design Systems)中使用了SDD(Symbolic Defined Devices)器件实现,对于速率方程进行了变形以改进模型的收敛性,该模型可用于大信号仿真。对于不同偏置条件下的半导体激光器的反射系数进行了仿真并且和测量结果进行了对比。首次在大信号仿真中验证了改进模型的精确性。展开更多
This paper presents an analog predistortion circuit for RF optical fiber links. The circuit consists of two source-coupled differential transconductance amplifiers which could provide linear and nonlinear transfer cha...This paper presents an analog predistortion circuit for RF optical fiber links. The circuit consists of two source-coupled differential transconductance amplifiers which could provide linear and nonlinear transfer characteristics by adjusting the bias voltage and the transistor sizes. The circuit was designed and realized in a standard 0,18-μm CMOS technology of SMIC. The chip occupies 0.48 × 0.24 mm^2. The DC supply is 3.3 V. Using this circuit, the third-order intermodulation distortion （IMD） suppression of a directly modulated RF optical fiber link can be improved by 9-16 dBc at relatively low cost.展开更多
基金supported by the State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,China~~
文摘实现了一种可以对于反射系数进行精确建模的半导体激光器电路模型并且与传统模型进行了比较。在ADS(Advanced Design Systems)中使用了SDD(Symbolic Defined Devices)器件实现,对于速率方程进行了变形以改进模型的收敛性,该模型可用于大信号仿真。对于不同偏置条件下的半导体激光器的反射系数进行了仿真并且和测量结果进行了对比。首次在大信号仿真中验证了改进模型的精确性。
基金Project supported by the High-Tech-Program of China (No.2007AA01Z2a5)
文摘This paper presents an analog predistortion circuit for RF optical fiber links. The circuit consists of two source-coupled differential transconductance amplifiers which could provide linear and nonlinear transfer characteristics by adjusting the bias voltage and the transistor sizes. The circuit was designed and realized in a standard 0,18-μm CMOS technology of SMIC. The chip occupies 0.48 × 0.24 mm^2. The DC supply is 3.3 V. Using this circuit, the third-order intermodulation distortion （IMD） suppression of a directly modulated RF optical fiber link can be improved by 9-16 dBc at relatively low cost.
