发光学报, 2019, 40 (9): 1192, 网络出版: 2019-09-27  

基于多模光纤的光时域滤波器及其在全光载波恢复中的应用

Optical Time Domain Filter Based on Multimode Optical Fiber and Its Application in All Optical Carrier Recovery
作者单位
北京交通大学 光波技术研究所, 全光网络与现代通信网教育部重点实验室, 北京 100044
摘要
常见的光滤波器主要对波长进行选择, 当滤波器带宽变窄时, 对光波长的漂移就会变得敏感, 限制了其使用范围。本文提出的光滤波器是基于由透镜和多模光纤组成的全光积分器。我们依据其时域特性对该滤波器的频域滤波特性进行了分析。该时域滤波器可以用于光载波恢复, 通过数值仿真验证得出该技术使相位调制信号两边带间和载波间的强度关系发生改变, 在不使用本振激光器的情况下完成光信号相位调制到强度调制的转换。
Abstract
The common optical filters at this stage mainly filter optical signals with specific wavelengths. When the bandwidth of the optical filter is narrow, it is very sensitive to the wavelength drift, which limits their application. The optical filter proposed in this article is based on an all-optical integrator composed of lens and multimode fiber(MMF). Based on its time domain characteristics, we analyze its frequency domain characteristics. This filter is used for optical carrier recovery to demonstrate its application. We verified the method by numerical simulation. The technology changes the intensity relationship between the two sides of the phase modulation signal and the carrier, it performs intensity modulation instead of phase modulation and the system didnt use the local oscillator laser during the modulation process.
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高洪培, 谭中伟, 付超. 基于多模光纤的光时域滤波器及其在全光载波恢复中的应用[J]. 发光学报, 2019, 40(9): 1192. GAO Hong-pei, TAN Zhong-wei, FU Chao. Optical Time Domain Filter Based on Multimode Optical Fiber and Its Application in All Optical Carrier Recovery[J]. Chinese Journal of Luminescence, 2019, 40(9): 1192.

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