摘要

针对光载无线通信(ROF)链路大量程、高精度时延测量需求,提出了基于时、频、信共传模式下的ROF链路时延测量方案。将秒脉冲信号进行副载波调制,使ROF信号和时延测量信号同波长传输,解决了秒脉冲测量信号对于ROF信号的干扰问题,同时实现了ROF传输和高精度时延测量功能。搭建了实验测量系统,验证了ROF系统和时延测量系统的兼容共生特性,测量了温度剧烈变化下的25 km光纤链路绝对时延及其时延变化。实验结果表明该方法在保证ROF链路信号传输质量的情况下能够实现高精度、大量程的链路时延测量。

Abstract

We propose a radio-over-fiber (ROF) link delay measurement scheme based on time, frequency,and ROF signal simultaneous transmission to meet the large-range and high-precision delay measurement requirements of ROF links. One pulse-per-second (1PPS) is processed with subcarrier modulation, so that the ROF signal and the delay measurement signal are transmitted at the same wavelength, avoiding the interference of the 1PPS signal to ROF signal and achieving high-precision delay measurement and ROF transmission simultaneously. We build up an experimental system to measure the absolute delay of the ROF signal during the 25 km fiber link at severely changed temperature, which verifies the compatible characteristic of the ROF system and the time-delay measurement system. The experimental results show that the proposed scheme can measure high-precision and large-range link delay without ROF signal degradation.

补充资料

中图分类号：TN913.1+2

DOI：10.3788/AOS201939.1206005

所属栏目：光纤光学与光通信

基金项目：国家自然科学基金;

收稿日期：2019-07-25

修改稿日期：2019-08-20

网络出版日期：2019-12-01

作者单位    点击查看

联系人作者：卢麟(Nj_lulin@163.com)

备注：国家自然科学基金;

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引用该论文

Guo Juncheng,Lu Lin,Wu Chuanxin,Zhang Baofu,Wei Heng,Zhao Xiaoyu. Time Delay Measurement Scheme for Radio-over-Fiber Link Based on Time-Frequency Signal Subcarrier Modulation[J]. Acta Optica Sinica, 2019, 39(12): 1206005

郭俊成,卢麟,吴传信,张宝富,魏恒,赵晓宇. 基于时频信号副载波调制的光载无线通信链路时延测量方案[J]. 光学学报, 2019, 39(12): 1206005

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