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Junfei Wang¹, Junhui Hu¹, Chaowen Guan¹

¹Key Laboratory for Information Science of Electromagnetic Waves (MoE), School of Information Science and Technology, Fudan University, Shanghai, 200438, China.

Scientific reports

|May 18, 2024

概括

研究人员调查了为什么高速激光二极管 (LD) 在可见光通信 (VLC) 中具有有限的调制反应. 他们发现串联电阻和并行电容显著影响性能,为设计更快的VLC系统提供了见解.

科学领域:

光电学是指光电子产品.
材料科学材料科学材料科学

背景情况:

基于化 (GaN) 的高速激光二极管 (LD) 对于可见光通信 (VLC) 是至关重要的.
在VLC系统中制造的LDs的调制响应限制尚未完全理解,这阻碍了超高速应用.

研究的目的:

调查限制VLC基于GaN的LDs调制响应的因素.
开发一个相当的电路模型来分析LD和包装对调制性能的影响.
为设计具有增强调制带宽的改进激光发射器提供见解.

主要方法:

为激光二极管 (LD) 和其包装构建了一个相当的电路模型.
通过实验和模拟,分析了各种注入电流的连续电阻和并行电容.
通过将散射参数与包装的LD相匹配来确定等效电路组件值.
研究了包装设计参数对调制响应的影响.

主要成果:

序列电阻和并行电容被确定为导致S21在低频率下滚动的关键因素.
减少连续电阻和并行电容明显改善了调制响应.
该研究量化了包装对调制性能的影响.

结论:

相当电路建模对于分析LD调制响应限制是有效的.
尽量减少连续电阻和并行电容对于实现高速VLC至关重要.
这项研究为设计超高速VLC的先进紫蓝绿激光发射器提供了基础,通过解决阻抗匹配.

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