浅谈光纤CATV传输和设计方法

浅谈光纤ＣＡＴＶ传输和设计方法□张延俊（江苏省徐州矿务局有线电视台２２１００６）典型的光纤传输系统有光发射机、光纤、光接收机和必要的光通路器件如光分配器、光纤连接器等组成。如图１所示。图１光纤传输系统１光纤ＣＡＴＶ的网络拓扑１．１星形网星形网是广电部...     

无源光网络中突发光发射机和接收机的设计

本文比较了无源光网络（ＰＯＮ）中突发工作方式的光发射机,接收机与传统的连续工作的光发射机,接收机的差别,分析了春特性,并给出了设计原理图,这些原理图同样适用于其它光纤计算机网络的光发射机,接收机。     

纤维光路无源器件产品介绍(三)——光电器件-光纤耦合器

光电器-光纤耦合器是一类光电器件与光波导之间进行光能量耦合的器件。其主要功能是实现光能量转换。广泛地用于光纤通信系统的光发射机、光接收机以及光纤传感、光电测试、自动控制等系统中。     

光纤CATV网络的设计和分析(二)

3 光设备性能 AM光纤系统是由下列四大部分组成的:一是光发射机;二是光接收机;三是光缆;四是光无源器件及辅助器件。     

光纤链路的干涉强度噪声对有线电视模拟系统的影响

有线电视引入光纤传输技术以后，从FTTC（光纤到路边）发展至今，FTTB（光纤到楼栋）以及光接收之后为无源接入网络已成为业内的热门话题。现就模拟电视1310nm传输系统（以下称AM-VSB-IM系统）的光纤链路（光发射机输出口至光接收机输入口）对全系统C／N值的影响作初步探讨。     

用于未来光纤通信系统的集成光学器件

本文扼要介绍集成光学器件在第三代光纤通信系统中的地位,以及根据现阶段光纤系统要求研完发展的 CEIC 光发射机、接收机、中继器、波分复用器和开关阵列等一系列集成光学器件的性能特点。     

新书介绍:《有线电视模拟——数字光纤与微波传输技术》

内容提要本书系现代实用新技术类书籍。结构独特 ,包括有线电视模拟与数字光纤及微波传输技术三部分 ,共2 1章。模拟光纤传输技术侧重于ＨＦＣ网络建设。从理论上系统、全面地介绍了光纤传输系统中所有器件、设备 ,包括 :光纤、光缆、光耦合器、光波分复用器、光纤连接器等各种无源器件 ,以及光发射机、光接收机、光放大器等有源器件在网络中的作用、基本工作原理、性能与主要技术参数 ,对光纤接续技术、光调制技术、光纤拓扑结构作了介绍 ,对ＡＭ、ＦＭ光传输系统的性能进行了详尽地分析 ,还全面详细地介绍了光纤传输链路的规划设计、设备…     

新书介绍

《有线电视模拟———数字光纤与微波传输技术》内容提要本书系现代实用新技术类书籍。结构独特 ,包括有线电视模拟与数字光纤及微波传输技术三部分 ,共2 1章。模拟光纤传输技术侧重于ＨＦＣ网络建设。从理论上系统、全面地介绍了光纤传输系统中所有器件、设备 ,包括 :光纤、光缆、光耦合器、光波分复用器、光纤连接器等各种无源器件 ,以及光发射机、光接收机、光放大器等有源器件在网络中的作用、基本工作原理、性能与主要技术参数 ,对光纤接续技术、光调制技术、光纤拓扑结构作了介绍 ,对ＡＭ、ＦＭ光传输系统的性能进行了详尽地分析 ,还…     

CATV光接收机性能指标评述

光纤CATV干线传输系统已日益普及。光纤传输系统主要由光发射机、光纤(光缆)和光接收机三部分组成,如何选择性能、价格比高的光发射机、光缆和光接收机,成为光纤干线系统应用者要着重考虑的问题之一。本文就光接收机的性能指标问题作一评述。光接收机有哪些主要性能指标,这些指标的意义是什么,指标值要多少才合适,不同厂家的光接收机能否兼容等问题在本文中论及。     

微波光纤技术的应用和发展概况

所谓微波光纤系统是指必须接收微波输入信号并提供微波输出信号的、包括光发射机、光接收机、光纤和其它有关元件的完整装置。随着光纤技术和高速光电子器件的迅速发展，光纤子系统已进入微波应用的领域。最近几年微波光纤技术取得了很大的进展。本文简单介绍国际上微波光纤系统的市场情况，以及微波光纤系统在通信、雷达和电子战等方面的应用。     

一种宽频带小型化光纤电场测量系统的研制

设计了一种宽频带小型化模拟量光纤电场测量系统,解决了核爆、雷电和电磁脉冲模拟器等辐射源产生的强电磁干扰环境下的瞬态电场测量问题。该系统采用单极子天线将空间瞬态电场转化为瞬态电压,并由置于探头内部的微型发射机将瞬态电压信号转化为光信号,通过光纤传输到远端的光接收机,最终还原成电信号。该系统在不同辐射源上进行实验测试,其工作性能稳定。系统的工作带宽在24kHz到1000MHz之间,噪声小于12mV,能测量小于100kV／m的瞬态电场,输出信号峰-峰值大于400mV。     

浅析光纤传输在视频监控的应用

光纤传输系统通常是以光纤作为传输介质的传输系统,实际上光只是载波.该系统主要有一个光发射端机、光纤传输、光接收端机等组成.前端摄像机是通过一小段同轴电缆连接到光发射端机的,光接收端机也是通过一小段同轴电缆连接到监视器的,而光发射端机与光接收端机之间则是通过光纤连接器连接的光纤光缆,最终组成监控系统.     

Impact of Optical Transmission on Multiband OFDM Ultra-Wideband Wireless System With Fiber Distribution

Multiband (MB) orthogonal frequency-division multiplexing (OFDM) ultra-wideband (UWB) wireless, which provides high data rate access, is required to be distributed by using optical fiber. The performance of MB-OFDM UWB over fiber transmission system is investigated considering optical modulation and demodulation impact. Theoretical analysis of the effect of fiber dispersion, optical transmitter, and optical receiver response on system performance is carried out considering amplitude and phase distortion. Experiments are conducted and verified by our theoretical analysis and good agreement is obtained. It is found that RF modulation index of $sim {hbox {4}}%$ is optimum for optical transmitter with Mach–Zehnder modulator, and optical receiver with Chebyshev-II response is the best for MB-OFDM UWB over fiber. Compared to back-to-back UWB over fiber, optical transmission is mainly limited by laser phase noise converted relative intensity noise and phase distortion induced by fiber dispersion when optimum modulation index is used. Higher modulation index is limited by amplitude and phase distortion to OFDM signal induced by optical transmitter and receiver response nonlinearities and fiber dispersion and the spectral mask. It is also found that highly received optical power is required for transmission of MB-OFDM UWB signal over fiber.      

卫星激光通信中光纤放大器的应用研究

介绍了卫星激光通信的特点,通过计算分析,提出了用于卫星激光通信光发射系统的高功率光纤放大器、用于光接收系统的前置光纤放大器的性能参数。给出了高功率光纤放大器和低噪声前置光纤放大器的实验方案。     

Passive alignment optical subassemblies for military/aerospacefiber-optic transmitter/receiver modules

Under the DARPA sponsored Avionics Optoelectronic Module Technology program, new passive alignment carrier (PAC) optical subassemblies (LED-PAC and PIN-PAC) ruggedized for military/aerospace avionics fiber-optic transmitter and receiver applications have been developed, LED-PAC and PIN-PAC silicon micro-optical bench substrates were fabricated together on a 5 in diameter silicon wafer via multistage photolithography, thin-film, and substrate processing. Alignment v-grooves designed for passive optical alignment of 100/140 μm multimode optical fiber to the optoelectronic devices were terminated by solder locking the fiber to the silicon PAC substrates. The LED-PAC comprising a surface emitting LED die-bonded onto a novel precision molded AM submount passively mounted onto the silicon microbench achieves the required high coupling efficiency to 100/140 μm multimode optical fiber to meet stringent avionics transmitter output power requirements. The 100/130 μm multimode optical fiber-pigtailed PIN-PAC with a refractive lens etched into the p-i-n photodiode backside surface exhibited responsivities greater than 0.8 A/W at 1.3 μm wavelength. The LED-PAC and PIN-PAC optical subassemblies integrated with Boeing ARINC 636 (FDDI) transmitter and receiver thick film multichip (MCM-C) circuitry are capable of meeting both ARINC 636 and FDDI physical layer requirements     

光纤通信的测量技术

对光纤以及光纤通信系统的若干测量方法作了介绍。主要介绍了光发射机、光接收机以及光放大器的测量；光通信系统的传输性能和光通道的测量。     

多路串口复用光纤传输系统的实现

介绍一种基于高速采样的多路串口信号复用的光纤传输系统。该系统采用可编程逻辑器件结合专用光电发送和光电接收器进行设计,实现了不同速率的多路串口信号复用的光纤传输。     

Optical Chaotic Communication Using Generalized and Complete Synchronization

We propose a secure optical communication system based on the principles of generalized and complete chaotic synchronization. A transmitter and a receiver both composed by two chaotic external-cavity semiconductor lasers are coupled in a master-slave configuration to provide generalized synchronization, while the master lasers in the transmitter and in the receiver are completely synchronized through the synchronization channel via an optical fiber. A message is added to the transmitter slave laser and sent to the receiver through the information channel to be compared with the output of the receiver slave laser. The system is robust to a small mismatch of the laser parameters or of the coupling between the master and slave lasers, unavoidable in a real system, and can even enable a good communication up to a 5 Gb/s transmission rate using the chaos masking encryption method, when the master laseres are coupled bidirectionally.      

Normal Incidence Free Space Optical Data Porting to Embedded Communication Links

In this paper, various techniques for normal incidence, free-space optical data porting to embedded data busses are presented. In the first approach, externally powered optical transmitter and receiver devices are coupled to an embedded electrical bus. This embedded link proves to be reliable through environmental and mechanical testing, and demonstrates data transmission up to 10 kHz. A self-powered transceiver is then fabricated and coupled to an optical fiber, showing data transmission up to 1 MHz. Finally, a self-powered bus using a dye-impregnated optical fiber is demonstrated to operate at speeds greater than 15 MHz. All methods explored overcome many of the problems associated with traditional physical connectorization, and are suitable for normal incidence remote querying of embedded passive elements, active devices, sensors, or networks.     

全光密集波分复用系统中光学器件研究进展

概述了国内外最新用于全光密集波分复用（D－WDM）系统中的光学器件的研究进展，这些器件包括光发射／光接收器、光复用／解复用器、光滤波器、光放大器及高速传输系统中的光色散补偿器等。