基于光纤布拉格光栅的微波光子信号处理

Microwave Photonic Signal Processing Using Fiber Bragg Gratings

由于有效利用了光子技术的优点,微波光子技术克服了传统微波系统中的一些瓶颈,从而提高已有系统性能,甚至开发出了全新的系统应用。很多光子器件已经被用在微波光子系统中,光纤布拉格光栅(Fiber Bragg grating,FBG)就是其中一种非常重要的全光纤器件。由于具有灵活的频谱响应特性、损耗低、质量轻、结构紧凑、以及与其他光纤器件耦合性好等独特的优势,光纤布拉格光栅已经成为了微波光子信号处理系统中的关键组件之一。本文主要介绍了近年来光纤布拉格光栅在微波光子信号处理应用中的最新进展,重点讨论的主要应用包括微波光子滤波器,微波任意波形产生,微波频谱感知以及光纤光栅传感器实时解调。最后,本文还讨论了在微波光子系统中应用光纤布拉格光栅的局限性及可能的解决方案。

Microwave photonics（MWP）is an emerging issue concering the interaction between microwaves and optical waves.A variety of photonic technologies are investigated to enable and enhance functionalities in microwave systems which are usually very challenging when using pure electrical solutions.A fiber Bragg grating（FBG）is one of the key photonic devices in microwave photonics signal processing due to its unique features such as flexible spectral characteristics,low loss,light weight,compact footprint,and inherent compatibility with other fiber-optic devices.The recent development in FBG-based microwave photonics signal processing applications is discussed,with an emphasis on microwave photonic filters,microwave arbitrary waveform generation,microwave spectrum sensing and real-time FBG sensor interrogation.The limitations and potential solutions of FBG-based MWP system are also discussed.