最新刊期

    卷 , 期 4 , 1993
    • Issue 4, Pages: 2(1993) DOI: 10.13756/j.gtxyj.1993.04.001
      摘要:<正> 世界著名光纤通信美籍专家厉鼎毅先生(AT&T)、林清隆先生(Bellcore)于1993年10月26~27日来武汉邮电科学研究院讲学。两位学者介绍了当前国际光纤通信的发展趋势,对我们发展国内光纤通信的战略方面起重要作用,明确了许多问题,具体如下: 1.今后将以1550nm窗口为主应用并大量采用掺铒光纤放大器(EDFA)。2.在2.5Gbit/s系统,中继距离50km以上,用色散位移光纤(DSF),可以不必用EDFA。  
        
      2
      |
      21
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502687 false
      发布时间:
    • Ren Xingen Xu Guoping
      Issue 4, Pages: 3-8(1993) DOI: 10.13756/j.gtxyj.1993.04.002
      摘要:In this paper, equivalent circuit models of semiconductor laser diodes and photodetectors are developed respectively in general purpose circuit analysis program PSPICE. whose model parameters can be extracted from external performance of the devices. The characteristics of a practical microwave subcarrier multiplexed (SCM) lightwave system are analyzed by using the presented models. The simulated results have a good agreement with experimental data.  
      关键词:PSPICE;microwave subcarrier multiplexed lightwave system   
      2
      |
      33
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502722 false
      发布时间:
    • Issue 4, Pages: 8(1993) DOI: 10.13756/j.gtxyj.1993.04.003
      摘要:<正> 据美刊《光纤产品新闻》1993年9月载,最近日本松下公司的研究人员实验创造出一项使激光二极管激射波长稳定的新技术。他们通过实验发现,采用最佳设计厚度的端面涂敷膜,使激光二极管的阈值增益与波长发生显著关系,最后可实现波长稳定的目的,而且阈值增益与波长的关系越显著,达到的波长稳定性就越高。目前他们为使端面反射率与波长相关灵敏从而使阈值增益在几十nm的大波长范围内与波长有关而采取超过20倍的常规端面涂敷厚度进行  
        
      2
      |
      33
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502739 false
      发布时间:
    • Yao Wenjie Wang Junjun
      Issue 4, Pages: 9-13(1993) DOI: 10.13756/j.gtxyj.1993.04.004
      摘要:In this paper,the polarization control of optical fiber in coherent optical communication system is theoretically studied and the mathematical model is proposed. Consequently, a reset equation of fiber squeezer in solving endless polarization control is obtained.  
      关键词:polarization state;reset;squeezer   
      2
      |
      31
      |
      2
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502703 false
      发布时间:
    • Zheng Yuanqiao
      Issue 4, Pages: 14-19(1993) DOI: 10.13756/j.gtxyj.1993.04.005
      摘要:This article introduces a 155Mbit/s add—drop multiplexer produced by GPT corporation. The general structure, functions of individual circuit card, management method and equipment management operation system have been described as well.  
      关键词:SDH;PDH;ring network   
      2
      |
      16
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502629 false
      发布时间:
    • Zhao Linji
      Issue 4, Pages: 20-26(1993) DOI: 10.13756/j.gtxyj.1993.04.006
      摘要:High speed and large capacity are the trends in the development of optical fiber communications. In this paper, the high speed light source, optical modulator, optical detector, optical amplifier and optical fiber dispersion equation are discussed, which are the main technical issues for IM/DD fiber optic transmissions.  
      关键词:IM/DD;high speed optical fiber communication   
      2
      |
      273
      |
      1
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502693 false
      发布时间:
    • Issue 4, Pages: 26(1993) DOI: 10.13756/j.gtxyj.1993.04.007
      摘要:<正> 据《NEC技报》1993年5月报道:ITS—2400 1:N SONET传输系统是北美长途通信公司开发的,具有最大传输容量的光通信传输系统。ITS—2400系统由NEC SONET设备构成,将非同步的DS3(44.736Mbit/s)信号、同步的OC—3(155.52Mbit/s)信号或同步的OC—12(622.08Mbit/s)信号复用成同步的OC—48(2.4Gbit/s)的光信号。本系统具有以下特长:  
        
      3
      |
      17
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502636 false
      发布时间:
    • Liu Jian Zhou Wenjun
      Issue 4, Pages: 27-32(1993) DOI: 10.13756/j.gtxyj.1993.04.008
      摘要:In this paper,the mode field diameter of random—core and double—cladding single mode fibers is studied through computer. This method is widely applicable and has the merits of high accuracy and speed. It has been proved to have a highly applicable value by comparing with the experimental results.  
      关键词:double cladding;single mode fiber;mode field diameter   
      2
      |
      87
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502676 false
      发布时间:
    • Liu Zeheng
      Issue 4, Pages: 33-38(1993) DOI: 10.13756/j.gtxyj.1993.04.009
      摘要:This paper discusses the mechanical reliability of long—length optical fibers. Two kinds of reference techniques for proof testing of optical fiber strength as well as the test methods are briefly presented. Optical fiber strength after proof testing is theoretically, analyzed. Finally,optical fiber lifetime is estimated and the lifetime design picture of optical fiber which passed three—grades proof testing strain is given.  
      关键词:proof testing;optical fiber strength;fiber lifetime   
      2
      |
      146
      |
      4
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502712 false
      发布时间:
    • He Shuping Hu Xianzhi Zhen Jingqi
      Issue 4, Pages: 39-43(1993) DOI: 10.13756/j.gtxyj.1993.04.010
      摘要:The high temperature softening property of quartz glass tube used in the field of optical fiber fabrication is studied. The high temperature status of different samples were observed with high temperature microscope. The contents of varied metal impurities and the OH ions were measured respectively. The factors influencing the high temperature softening properties of quartz glass are discussed in detail. The suggestions for improving the quality of China—made quartz glass tubes are proposed.  
      关键词:quartz glass tube;softening;viscosity   
      2
      |
      201
      |
      4
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502664 false
      发布时间:
    • Issue 4, Pages: 43(1993) DOI: 10.13756/j.gtxyj.1993.04.011
      摘要:<正> 日本电信电话公司(NTT)为了宣传该公司的ISDN技术,吸引更多的外国用户,继在英国设置ISDN中心之后又在德国的杜塞尔多夫设置了ISDN中心。该中心安装的主要设备有电视会议系统、G4传真机、LAN接续装置等,当前主要向日本在当地的企业和德国在日本的  
        
      2
      |
      12
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502684 false
      发布时间:
    • Issue 4, Pages: 43(1993) DOI: 10.13756/j.gtxyj.1993.04.012
      摘要:<正> 捷克电信管理机构(SPT)与AT&T签署了在捷克敷设干线网络传输设备。合同包括提供和敷设SDH网路系统、多路调制器和光缆,价值为1200万美元。计划1993年10月开工,1994年末竣工。  
        
      2
      |
      13
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502690 false
      发布时间:
    • Liang Chenhuan Gao Honglai Liu Wujun You Jiangchang
      Issue 4, Pages: 44-48(1993) DOI: 10.13756/j.gtxyj.1993.04.013
      摘要:In this paper, the design and fabrication of a stainless PC SM optical fiber connector is presented. The stainless material is used for the pin proper with its endface is made into a spherical shape. The typical value of insertion loss is 0. 3 dB,and the return loss is more than 35 dB. With a excellent anti—reflection performance,it is thereby especially applicable to the large capacity,extra high speed digital transmission,wide band video analogue transmission and LAN optical fiber communication system.  
      关键词:stainless;PC SM optical fiber connector;return loss   
      2
      |
      38
      |
      2
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502651 false
      发布时间:
    • Issue 4, Pages: 48(1993) DOI: 10.13756/j.gtxyj.1993.04.014
      摘要:<正> 日本横河·休利特—帕卡德(简称YHP)公司强化了光通信部件的开发体制。以往光通信用部件是以美国休利特—帕卡德(HP)公司为中心开发的,从1993年11月份起YHP也开始开发面向日本国内的产品。现在每年在日本售销额为7亿日元,预计到1996年10月达到20亿日元,到1998年10月将增大到50亿日元。该公司的产品有通用光纤组件、光纤通道、FDDI收发共用电路、吉(109)位环形片、时钟  
        
      2
      |
      12
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502673 false
      发布时间:
    • Wei Yakun Zhu Xiaobing Bao Youming
      Issue 4, Pages: 49-53(1993) DOI: 10.13756/j.gtxyj.1993.04.015
      摘要:The performances and the application of QGG06—W intelligent optical power meter suitable for field installation project are described in this paper. The introduction focuses on the principle and feature of the meter.  
      关键词:optical power meter;optical attenuation;single-chip microcomputer   
      2
      |
      100
      |
      2
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502642 false
      发布时间:
    • Issue 4, Pages: 53(1993) DOI: 10.13756/j.gtxyj.1993.04.016
      摘要:<正> 日立制作所中央研究所开发了下一代相干光通信用窄谱宽半导体激光器。谱线宽为3.6kHz,采用这种半导体激光器可实现具有最高接收灵敏度的相位调制、零差检波方式。器件的结构是内部有衍射栅的分布反馈型,为了实现窄谱线,采用了周期调制型衍射栅和应变多量子阱有源层。  
        
      3
      |
      120
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502639 false
      发布时间:
    • Chen Minna Yang Yixiu Zhu Minghua Zhang Peiying
      Issue 4, Pages: 54-57(1993) DOI: 10.13756/j.gtxyj.1993.04.017
      摘要:Tetraethoxysilane was hydrolyzed with HCl and mixture of HF with the fumed silica was added and well—dispersed. By adding ammonia solution the pH value of sol was adjusted to 4. 5 and the sol was poured into a polypropylene mold and gelled,then the gel was dried into dry—gel and sintered into silica glass. Large—size silica glass tubes are obtained whose outside diameter is 20 mm,the wall thickness is 2. 5 mm and the length is 250 mm,the ratio of the volumes of wet gel to silica glass is 50%,Dry—gel is not easy to crack. The rate of finished products is about 90%.  
      关键词:sol-gel;HF;silica glass tube   
      2
      |
      51
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502729 false
      发布时间:
    • Issue 4, Pages: 58-60(1993) DOI: 10.13756/j.gtxyj.1993.04.018
      摘要:<正> 自1979年世界著名科学家钱学森教授提出“光子学、光子技术、光子工业”概念以来,在国内外引起了强烈的反响和讨论。经过十多年来的讨论和实践,有关“光子学、光子技术、光子工程”的概念已被有关学术界所公认。最近以来,国内正在开展有关光子学、光电子学以及电子学方面的有关问题大讨论。本文就这方面的问题发表一点个人的看法,以示讨论与共识。信息技术是当今高科学技术中具有先导地位的领域。也是发展最迅速、学术思想最活跃的领域。它的成就和进一步的发展,将会影响其它自然科学和各个领域技术的发展。  
        
      2
      |
      81
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502699 false
      发布时间:
    • Issue 4, Pages: 61-63(1993) DOI: 10.13756/j.gtxyj.1993.04.019
      摘要:<正> 1993.9.7~1993.9.17在日内瓦国际电信联盟总部召开了ITU—T(原CCITT)第15研究组(SG15)会议,同时也召开了各工作组会议。SG15是传输设备与系统研究组:第1工作组(WP1)是视听设备组;第2工作组(WP2)是信号处理组;第3工作组(WP3)是复用设备组;第4工作组(WP4)是光传输设备与系统组;第5工作组(WP5)是传输网络管理组。  
        
      2
      |
      37
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502661 false
      发布时间:
    • Issue 4, Pages: 64-57(1993)
        
      2
      |
      14
      |
      1
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502627 false
      发布时间:
    • Issue 4, Pages: 65(1993) DOI: 10.13756/j.gtxyj.1993.04.020
      摘要:<正> 1993年10月28日美国工程科学院院士,AT&T Bell Lab激光和光纤通信专家厉鼎毅博士偕同Bellcore宽带光波系统研究室主任林清隆博士来上海。厉博士是上海交通大学名誉教授,曾多次来国内讲学,林博士是新竹交大兼职教授,这是第一次来上海进行学术交流。两位博士于10月29日上午和30日上午在交大举行了演讲和座谈会。他们详细介绍了最近3年国际上光纤放大器(EDFA)和波分多路技术(WDM)的重要作用,以及由这两者形成新的一代光波传输系统(即我们常称的光纤通信系统)。特别使我们受到鼓舞和加强信心的是,我们对光纤通信的一些重要观点获得了两位国际  
        
      2
      |
      25
      |
      0
      <HTML>
      <Meta-XML>
      <引用本文> <批量引用> 27502719 false
      发布时间:
    0