基于单个马赫曾德尔调制器产生射频光残留边带的研究  

作　　者：袁喆 刘开贤[1] 陈新桥[2] 

机构地区：[1]中国传媒大学数据科学与智能媒体学院,北京100024 [2]中国传媒大学信息与通信工程学院,北京100024

出　　处：《现代传输》2019年第6期67-69,共3页Modern Transmission

摘　　要：光残留边带(optical vestigial sideband,OVSB)既可克服光双边带(optical double-sideband,ODSB)色散问题,又可解决光单边带(optical single-sideband,OSSB)信噪比低的问题,是光载射频(Optical radio frequency,ROF)技术中的一种高效的调制方案。本文提出了采用单个马赫-曾德尔调制器(Mach-Zehnder Modulator,MZM)产生OVSB的方法。通过控制注入到MZM的射频(Radio Frequency,RF)端口的两个RF信号间的相移,可得到不同边带比(Sideband Suppression Ratio,SSR)的OVSB信号。分析了MZM产生OVSB的原理,采用optisystem光子模拟软件,设计出来了一种基于MZM产生OVSB的结构,仿真得到了不同相移情况下的OVSB光谱图,验证了方法的可行性。该方法结构简单,成本低廉,SSR调节灵活,可降低ROF系统的成本,提高系统性能。Optical vestigial sideband(OVSB) can overcome the optical double-sideband(ODSB) dispersion problem,and can also solve the low optical single-sideband(OSSB) The problem is an efficient modulation scheme in Optical Radio Frequency(ROF) technology.This paper proposes a method for generating OVSB using a single Mach-Zehnder Modulator(MZM).By controlling the phase shift between two RF signals injected into the radio frequency(RF) port of the MZM,OVSB signals with different sideband ratios(SSR) can be obtained.The principle of OVSB generated by MZM was analyzed,and a structure for generating OVSB based on MZM was designed by using optisystem photon simulation software.The OVSB spectra of different phase shifts were obtained by simulation,and the method was verified to be feasible.The method has a simple structure,low cost,and flexible SSR adjustment,which can reduce the cost of the ROF system and improve system performance.

关 键 词：光载射频技术(ROF) 马赫-曾德尔调制器(MZM) 光残留边带(OVSB) 光双边带(ODSB) 光单边带(OSSB) 边带比(SSR) 

分 类 号：TN9[电子电信—信息与通信工程]