基于光纤的光学傅里叶变换实现方法及应用  

Application and Implementation of Optical Fourier Transform Based on Optical Fiber

作　　者：孔梦龙 谭中伟[1] 张琳[1] Kong Menglong;Tan Zhongwei;Zhang Lin(Key Laboratory of All Optical Network and Advanced Telecommunication Network,Ministry of Education,Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]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

出　　处：《激光与光电子学进展》2019年第11期102-108,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61875008)

摘　　要：在检测频率复杂的信号时,光学傅里叶变换的高带宽、快速性优势凸显,其在光谱和高速射频信号的实时检测中都有重要应用。基于色散的光学傅里叶变换方法包括色散展宽和时间透镜方法。基于光纤色散方法,对比分析了基于色散展宽和基于时间透镜的光学傅里叶变换的实现原理。对两类方案中5种不同系统的输出结果、色散量、光谱分辨率、时间带宽积等影响因素进行分析,分别阐述了其应用及改进方案。The advantages,high bandwidth and high speed,of optical Fourier transform have been proved to be highlighted since the frequency of the objective signal becomes increasingly complicated,further,it has significant applications in the fields of optical spectra and real-time detection of high-speed radio frequency signals.The optical Fourier transform based on fiber dispersion comprises two particular methods:dispersive pulse broadening and time lens.Based on the optical fiber dispersion method,the realization principles of optical Fourier transform based on dispersion broadening and time lens are compared and analyzed.In addition,it summarizes five representative approaches divided into two categories,analyzes the empirical performance including output,dispersion,spectral resolution,time-bandwidth product,and expounds the applicability and improvement of these approaches.

关 键 词：傅里叶光学 时频转换 光纤色散 时间透镜 

分 类 号：O433.4[机械工程—光学工程]