Investigation on All-optical Clock Recovery from High-Speed NRZ Data 高速非归零码数据的全光时钟恢复研究
The result of numerical simulation on a 10 Gbit/ s NRZ transmission system demonstrates a significant improvement in the eye pattern by employing the PMD compensator. 针对10Gbit/s非归零(NRZ)传输系统,采用这种技术对进行PMD补偿的模拟计算结果表明,接收信号的眼图在补偿后得到了显著改善。
It states designing idea and realizing method of the system, analyses in detail the working principle of the system and mutual transforming method of NRZ code and AMI code. 阐述了该系统的设计思想和实现方法,详细分析了该系统的工作原理和单极性不归零码与双极性归零码的相互转换方法。
The conversion between NRZ and HDB3 is introduced, and the circuit of code and decode of HDB3 are designed by CPLD. 多数的数字基带信号用单极性不归零码(NRZ)表示,介绍了NRZ码与HDB3码之间的转换,用CPLD设计了HDB3码编译码器。
Experiments are performed to measure the spectra, eye diagrams and power penalties of conventional NRZ signals and phase-pre-modulated NRZ signals under different modulation depth and dispersion. 实验观测了普通非归零码和相位预调制的非归零码在不同相位调制深度和色散下的光谱、眼图和功率代价。
Performance Comparison between RZ& NRZ Modulation Formats in 40 Gb/ s WDM System 40Gb/sWDM系统中RZ&NRZ调制格式的性能比较
A novel scheme for all-optical NRZ to pseudo-return-to-zero ( PRZ) conversion using a folded ultrafast nonlinear interferometer ( UNI) has been put forward and demonstrated for the first time. 提出了一种基于折叠式超快非线性干涉仪的全光NRZ到伪归零(PRZ)信号转换的新型方案。
In this paper, the design of laser-driver GaAs IC with NRZ/ RZ con-version option for high-speed optical-fiber communication systems is intro-duced. 介绍了用于高速光纤通信系统的具有NRZ/RZ变换选择的激光二极管驱动器GaAs集成电路设计。
In baseband transmission system, the transform between NRZ and HDB3 is usually needed. 在基带传输系统中常需要进行NRZ码和HDB3码间的相互转换。
Clock component extraction of non-return-to-zero ( NRZ) signal based on semiconductor optical amplifier ( SOA) loop mirror was numerically simulated and experimentally studied. 对基于半导体光放大器非线性环镜的非归零信号时钟分量提取进行了数值模拟和实验研究。
Transmission performance of NRZ at dispersion managed optical fiber links 非归零码在色散控制光纤链中的传输特性
Influence of polarization mode dispersion on NRZ and RZ System 偏振模色散对NRZ码和RZ码系统影响的研究
Timing Clock Obtaining of NRZ Code and RZ Code In Optical Digital Communications 光纤数字通信中NRZ与RZ码序列的定时时钟提取
The transmission of E1 data packet to EPON bus was realized by conversion of HDB3 line encoding to NRZ digital signals, setting up clock of system and network, organizing EPON data frame, and generating synchronization clock of E1 circuit simulation etc. 其E1数据包到EPON总线的传输,通过HDB3线路编码到NRZ数字信号的转换,系统及网络时钟设定,EPON数据帧的组织,E1仿真电路同步时钟的产生等步骤实现。
A 622MB/ s Clock data Recovery Circuit for NRZ code, which is based on phase locked loop, is proposed in this paper. 文中提出了一种以锁相环为基础的622MB/sNRZ码的时钟数据恢复电路。
Comparison of adaptive PMD compensation for RZ and NRZ RZ码和NRZ码的偏振模色散自适应补偿特性比较
Pattern conversion is the key technology for all-optical clock recovery from non-return-to-zero ( NRZ) signal. 码型转换是实现非归零(NRZ)信号全光时钟恢复的关键技术。
Simulation of Transmission System of RZ and NRZ 归零码和非归零码传输系统模
40 Gb/ s simulation and 10 Gb/ s experiment are performed using tunable clock or data-related signal as the phase pre-modulating signal. The eye opening and receiver sensitivity are improved and the dispersion tolerance is doubled when the phase pre-modulation is imposed on NRZ signals. 10Gb/s实验和40Gb/s仿真结果表明,采用时钟信号和数据相关信号对非归零码进行可调节的相位预调制,可增加信号的眼图开启度和接收灵敏度,将系统的色散容限提高1倍左右。
This scheme relaxes the requirement of optical signal-to-noise ratio and dispersion management. It also benefits the NRZ system upgrade because the phase pre-modulation is easy to be employed and adjusted at the transmitter. 2. 该方法降低了系统对光信噪比和色散管理的要求,且由于相位预调制在发射端进行,调节方便,实施简单,便于系统升级。
Clock extraction from degraded NRZ signal was experimental realized. The tolerance of the input signal deterioration degree was analyzed. 实验实现了恶化NRZ信号的时钟提取,分析了该时钟提取结构对输入信号恶化程度的容忍度。
The system data transmission code is NRZ, so in the E1 data transmission, through CPLD programming and polarity circuit to achieve the conversion between the HDB3 code and NRZ. 系统数据传输码为非归零码,所以在传输E1数据前,通过CPLD编程和极性转换电路,实现非归零码和HDB3码之间的转换。
Non-return-to-zero ( NRZ) and return-to-zero ( RZ) are the most popular optical modulation formats in the optical communication system. 非归零码(NRZ)和归零码(RZ)是光通信系统中最常见的两种光调制格式。
The main points are as follows: 1. A new method to improve dispersion tolerance by imposing phase pre-modulation on non-return-to-zero ( NRZ) format is put forward in this dissertation. 取得以下主要研究成果:1、提出了一种对非归零码进行相位预调制,提高系统色散容限的方法。
By setting the center frequency and bandwidth of the optical bandpass filter ( OBPF) reasonably, we can achieve the optical modulation format conversion from NRZ to RZ. 通过合理地设置光学带通滤波器(OBPF)的中心频率和带宽,可以实现从NRZ到RZ的光调制格式转换。