脉冲参量对时间门控光频域反射仪性能的影响 |
| |
引用本文: | 易守天,张志勇,何海军,张信普,钱恒. 脉冲参量对时间门控光频域反射仪性能的影响[J]. 激光技术, 2021, 45(2): 162-167. DOI: 10.7510/jgjs.issn.1001-3806.2021.02.006 |
| |
作者姓名: | 易守天 张志勇 何海军 张信普 钱恒 |
| |
作者单位: | 西南交通大学 信息科学与技术学院 信息光子与通信研究中心,成都610031;西南交通大学 信息科学与技术学院 信息光子与通信研究中心,成都610031;西南交通大学 信息科学与技术学院 信息光子与通信研究中心,成都610031;西南交通大学 信息科学与技术学院 信息光子与通信研究中心,成都610031;西南交通大学 信息科学与技术学院 信息光子与通信研究中心,成都610031 |
| |
基金项目: | 国家自然科学基金;高等学校学科创新引智计划计划) |
| |
摘 要: | 为了对时间门控光频域反射仪系统参量设置进行优化,采用光脉冲压缩原理搭建了时间门控光频域反射仪试验系统,进行了理论分析与实验验证,取得了仿真与实验数据.结果表明,当探测光脉冲信号的峰值功率和本振光信号功率不变时,系统信噪比只与啁啾率相关,且与其成反比;当扫频范围保持80MHz不变时,系统相位噪声随脉宽增加呈现先减小后增大...
|
关 键 词: | 光纤光学 散射 时间门控光频域反射仪 啁啾率 信噪比 相位噪声 |
收稿时间: | 2020-03-17 |
The influence of pulse parameters on the performance of time-gated digital optical frequency domain reflectometer |
| |
Abstract: | In order to optimize the parameter settings of the time-gated digital optical frequency domain reflectometer (TGD-OFDR) system, an experimental system was built based on the optical pulse compression reflectometry. Theoretical analysis and experimental verification were carried out, and simulation and experimental data were obtained. Both of the results show that the system signal-to-noise ratio (SNR) is only related to the chirp rate. When the pulse power of the probe light and the signal power of the local oscillator light have been set, the chirp rate increases with the SNR decreasing. And the phase noise decreases firstly and then increases with the increase of the pulse width with the minimum value of about 2.5μs when the sweep range keeps 80MHz. Hence, the optimal phase noise (minimum value) can be obtained by adjusting the pulse width with the maximum sweep frequency range of the system remains unchanged. The results have certain reference significance to the parameter optimization of the TGD-OFDR system design. |
| |
Keywords: | |
本文献已被 万方数据 等数据库收录! |
| 点击此处可从《激光技术》浏览原始摘要信息 |
|
点击此处可从《激光技术》下载免费的PDF全文 |
|