基于下变频TOF-TDC的飞秒级微波光子延时测量技术研究

Research on FS-scale Time Jitter Measurement Technique in Microwave Photonic Links Based on Frequency Down Conversion with TOF-TDC Method

摘要:

提出了一种基于下变频的飞行时间-时间数字转换(TOF-TDC)原理的微波光子传输链路延时抖动测量技术, 并详细地阐述了该技术的基本原理、系统构架以及参数设计等。该技术能以飞秒量级的测量精度以及大延时测量范围对信号延时抖动进行测量。环境因素导致的延时抖动严重地影响了高频模拟微波光传输相位传递, 进而制约其在光控相控阵等领域中的广泛应用。所提出的延迟抖动测量技术从本质上解决了光传输链路在电子战、宽带雷达等宽带应用场合中稳相传输所遇到的一个基础性问题, 具有很大的应用推广潜力。

Abstract:

In this paper, the fs-scale delay jitter measurement technique in microwave photonic links (MPL) based on frequency down conversion with TOF-TDC method was resented. The basic principle of the measurement mechanism, system structure and parameter design are discussed in detail. The signal delay jitter can be measured with the fs-scale accuracy and great delay measurement range. The delay jitter caused by the environmental factors can influence the phase transfer of the high-frequency analog microwave light transmission seriously, which restricts its wide applications to the optically controlled phased array. The delay jitter measurement technique proposed in this paper can essentially solve the basic problem encountered in the stationary phase transmission in the optical transmission link for EW and wideband radar, and has good potential for application.