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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=5&size=small" /></div> <h1 class="ph">反激光器研制成功标志着光计算机研发重要突破 </h1> <p class="xg1"> 时间：2011-2-22 09:00<a class="zz" href="home.php?mod=space&uid=5">作者：tlx</a> 阅读<em id="_viewnum">(2151)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=1626&idtype=aid" title="查看全部评论"><em id="_commentnum">1</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>反激光开关装置有可能解决光学计算机研发进程中的最棘手挑战之一，也就是用于信息编码的光信号的管理和控制问题。举例来说，CPA可用于光学开关，该开关可以吸收特定波长的光，而允许其他波长的光通过。这种开关还可用 ...</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">美国耶鲁大学的科学家们已经研制出世界首个所谓“反<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>器”，该装置可以消除由激光装置发出的光束。<BR><BR>这种装置可能成为光学计算机的一个必不可少的元件。长期以来，用光学信号替代<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>信号的光学计算机一直被认为是电脑的后继者。<BR><BR>尽管和学家们早就熟知吸收光线的各种手段，但是上述技术在吸收特定波长的光线方面确实独一无二的。<BR><BR>耶鲁大学<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>学家A.Douglas Stone和其同事Hui Cao共同领导了反激光器的的研发工作。<BR><BR>激光器可产生相干光，也就是一束具有相同频率、振幅和波形的光子流。<BR><BR>研究人员称他们已经研制出了相干光全吸收器（CPA），也就是一块可捕捉和驱散预定波长相干光的硅晶圆。换句话说，如果一个激光器生成了相干光，那么CPA便可完全吸收这些相干光，因而也消除了可能产生热量的光能。<BR><BR>这样一个反激光开关装置有可能解决光学计算机研发进程中的最棘手挑战之一，也就是用于信息编码的光信号的管理和控制问题。举例来说，CPA可用于光学开关，该开关可以吸收特定波长的光，而允许其他波长的光通过。这种开关还可用于探测进入的光，或者作为波导指引光束沿着某条路径传输。<BR><BR> <P><A href="http://www.oecr.com/data/attachment/portal/201102/22/08582699abkeax1lq21qlx.jpg" target=_blank><IMG src="http://www.oecr.com/data/attachment/portal/201102/22/08582699abkeax1lq21qlx.jpg"></A></P>光学开关的原理图：某个特定波长的光会被完全吸收<BR><BR>研究人员称，在未来的光学计算机中，这种反激光装置有望取代<a href="http://material.oecr.com" target="_blank" class="relatedlink">晶体</a>管。和今天的电脑相比，光脑（光学计算机）的性能更加强大，而其元件可以突破今天电子技术的限制，缩小到难以想象的地步。<BR><BR>当然，作为原型机来看，CPA也存在某些局限。现有CPA的吸光率只能达到99.4%，要想投入正常使用，其吸光率必须实现99.999%。其次，现有CPA宽约一厘米，研究人员称有望将其缩小到远小于6个微米。</td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" 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