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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">新型光接收机有望实现真正光纤到户 </h1> <p class="xg1"> 时间：2016-2-16 13:58<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1350)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=4012&idtype=aid" title="查看全部评论"><em id="_commentnum">6</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>研究人员发表在最近出版的《光波技术》杂志上的论文称,新型光接收机保留了传统光接收器的诸多优点,但是更小,只有原来75%至80%的组件,显著降低了制造和维修成本,而且其灵敏度能与现有网络匹配。新型光接收机有助实现 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 光纤到户（FTTH：fiber to the home），顾名思义就是一根光纤直接到家庭。即光接入网的应用类型之一，光网络单元(ONU)放在用户家中。<span style="line-height: 1.8em;">将光纤直接接至用户家，其带宽、波长和传输技术种类都没有限制，适于引入各种新业务，是最理想的业务透明网络，是接入网发展的最终方式。</span><span style="line-height: 1.8em;">虽然现在移动<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">通信</a>发展速度惊人，但因其带宽有限，终端体积不可能太大，<a href="http://display.oecr.com" target="_blank" class="relatedlink">显示</a>屏幕受限等因素，人们依然追求性能相对占优的固定终端，也就是希望实现光纤到户。</span></div><div> 但目前人们所说的光纤到户（FTTH）通常只到交接箱，还远不及终端用户。所谓的“最后一公里”，即家庭用户通过交接箱与全球互联网的连接，大多是用铜缆，因为能读取光信号的光接收机非常昂贵，许多家庭难以负担。即使在FTTH技术领先的日本、韩国等国家，FTTH连接也不足50%，在英国还不到1%。</div><div> 限制FTTH的主要原因是成本，要实现它不仅要把光缆铺到每个家庭，还要提供用户负担得起的光接收机。核心网中所用的高灵敏度相干光接收器复杂又昂贵，而UCL光网团队和其他团队合作开发的新型光接收机，让真正的光纤到户成为现实。</div><div><br></div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201602/16/134749r8u955vuu8u5qpv2.png" target="_blank"><img src="data/attachment/portal/201602/16/134749r8u955vuu8u5qpv2.png"></a></p></div><div><br></div><div> 据科技日报，目前的网络基础设施很难满足呈指数增长的数据传输需求。最近，英国伦敦大学学院（UCL）设计并<a href="http://opticaltest.oecr.com" target="_blank" class="relatedlink">测试</a>了一种新型光接收机，有望大大降低光纤网络直达家庭用户的成本，使每个家庭直接与全球互联网相连。</div><div> 该研究首席研究员、UCL<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>与电气工程系博士赛泽·厄基林科说：“我们简化后的光接收机，既能廉价地大量生产，还能保持光信号的质量。目前连接家庭用的铜缆，平均数据传输速率约每秒300兆字节（Mb/s），很快就会变成制约信息传输的瓶颈，按需求到2025年要达到5至10Gb/s，我们的技术能支持每秒10Gb/s的速率，使它成为真正的未来技术。”</div><div> 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