概括
本研究介绍了一种用于优化微波光子链接中马赫-泽恩德调制器 (MZMs) 的自动控制系统. 该系统增强了线性和无动态范围 (SFDR),以提高信号质量.
科学领域:
- 光子学和光学工程的工程.
- 半导体设备物理 半导体设备物理
- 微波工程 微波工程
背景情况:
- Mach-Zehnder调制器 (MZM) 对微波光子链路至关重要.
- 实现最佳的线性操作对于最小化扭曲和最大化动态范围至关重要.
- 现有的偏差稳定方法可能无法保证最高的线性.
研究的目的:
- 提出和演示一个自动化控制系统,用于偏向载体-耗尽MZMs.Ms.
- 确定最佳的线性操作点,以提高微波光子链路的性能.
- 为了改进无刺动态范围 (SFDR),超越传统的正方形偏差.
主要方法:
- 叠加一个低频的双色调二声波信号与射频调制信号.
- 提取基本波 (FH) 和第三级调节间扭曲 (IMD3) 组件.
- 扫描偏差电压和光路径差异,以找到最大SFDR的点.
- 在500 MHz执行SFDR测量以验证线性化.
主要成果:
- 控制系统成功地确定了MZM的最佳线性操作点.
- 在最佳点实现的SFDR是107.5 dB·Hz2/3在500 MHz.
- 这代表了SFDR在6dB的改进,与方位点相比.
结论:
- 开发的控制系统有效地实现了MZM的自动最佳偏差.
- 该系统显著提高了微波光子链接的线性和SFDR.
- 这种方法提供了一种改善光学调制系统性能的实用方法.
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