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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=62" 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">随机拉曼光纤激光器研究取得新进展 </h1> <p class="xg1"> 时间：2017-3-9 10:40<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1346)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=5468&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=62" 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>近期，中国科学院上海光学精密机械研究所空间激光信息技术研究中心研究员冯衍领衔的课题组，在随机拉曼光纤激光器研究中取得新进展。</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> 近期，中国科学院上海光学精密<a href="http://machine.oecr.com" target="_blank" class="relatedlink">机械</a>研究所空间<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>信息技术研究中心研究员冯衍领衔的课题组，在随机拉曼光纤激光器研究中取得新进展。</div><div><br></div><div><div style="line-height: 25.2px;"><font color="#808000" size="4" style="line-height: 25.2px;"><b> 推荐阅读</b></font></div><div style="line-height: 25.2px;"> <font size="3"> <a href="http://www.oecr.com/article-5333.html"><font color="#800080"><b>解密！白色激光创造难度大的原因</b></font></a></font></div><div style="line-height: 25.2px;"><span style="line-height: 1.8em;"><font size="3"> <a href="http://www.oecr.com/article-5305.html"><font color="#800080"><b>创造世界新记录：科学家研制“超级激光”</b></font></a></font></span></div></div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201703/09/103905waruqzvbopodoyvb.jpg" target="_blank"><img src="data/attachment/portal/201703/09/103905waruqzvbopodoyvb.jpg"></a></p></div><div><br></div><div style="text-align: center;"> 图为超宽调谐随机拉曼激光器的结构示意图</div><div><br></div><div> 研究中提出了一种超宽调谐的随机拉曼激光器结构，实现了1-1.9μm的连续可调谐的随机拉曼激光输出，最大的输出功率为6.2W，输出波长为1.82μm。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201703/09/103916vu063yhhkh7ti3tu.jpg" target="_blank"><img src="data/attachment/portal/201703/09/103916vu063yhhkh7ti3tu.jpg"></a></p></div><div><br></div><div style="text-align: center;"> 图为1-1.9μm连续可调谐的随机拉曼激光输出光谱图</div><div><br></div><div> 2010年，Sergei K. Turitsyn等人报道了一种新型激光器(Nature Photonics 4, 231 - 235 (2010))，其采用标准单模光纤提供拉曼增益，通过其背向瑞利散射提供分布式反馈，产生随机激光输出，并正式提出“随机分布反馈光纤激光器”的概念。相比于传统激光器，随机激光器并没有传统意义的谐振腔，而是利用单模光纤中的瑞利散射效应提供随机分布反馈产生叠加而形成的新型无腔结构的激光器，因此基于随机分布反馈的拉曼光纤激光器具有结构简单、方向性好，输出连续稳定及波长可调谐等特性，在非线性光学、光<a href="http://sensor.oecr.com" target="_blank" class="relatedlink">传感</a>与光<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">通信</a>、生物医学成像、遥感等领域有着广泛的潜在应用前景。</div><div><br></div><div> 该项研究中，研究人员将随机拉曼激光器的可调谐特性同级联特性相结合，通过<a href="http://theory.oecr.com" target="_blank" class="relatedlink">理论</a>分析和实验研究，利用可调谐掺镱光纤激光器泵浦随机拉曼激光器实现——50nm可调谐的随机激光输出，同时结合级联拉曼技术获得宽波段可调谐的随机激光输出。初步的演示实验采用标准的单模光纤作为拉曼增益光纤，获得了300nm连续可调谐的随机拉曼激光输出（Opt. Lett. 41, 215 (2016)），进一步的波长调谐受限于四波混频造成的光谱展宽效应。通过优化拉曼增益光纤的色散，非线性系数以及传输损耗等参数，同时提高可调谐泵浦激光器的输出功率，采用半开放腔的随机拉曼激光器，最终获得了1-1.9μm的连续可调谐的随机拉曼激光输出，最大的输出功率为6.2W，对应的输出波长为1.82μm，该结果发表于《科学报告》（Sci. Rep. 7, 42611 (2017)）。<span style="line-height: 1.8em;">该项研究得到了国家自然科学基金项目的支持。</span></div><div><span style="line-height: 1.8em;"><br></span></div><div><p style="text-align: center;"><a href="data/attachment/portal/201703/09/103943w399zql1ay3y3un6.jpg" target="_blank"><img src="data/attachment/portal/201703/09/103943w399zql1ay3y3un6.jpg"></a></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="line-height: 25.2px;">欢迎关注光电<a href="http://news.oecr.com" target="_blank" class="relatedlink">资讯</a>微信公众号，每天将由光电工程师<a href="http://club.oecr.com" target="_blank" class="relatedlink">社区</a>网站(oecr.com)编辑团队为您精选行业动态，科技资讯，技术解析，光电<a href="http://www.oecr.com/portal.php?mod=list&catid=62" target="_blank" class="relatedlink">科普</a>等精彩内容，欢迎交换友情链接</span><span style="line-height: 25.2px;">(</span><b style="line-height: 25.2px;"><a href="http://bbs.oecr.com/thread-270693-1-1.html">查看详情</a></b><span style="line-height: 25.2px;">)。</span></p></div></td></tr></table> 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</dl><a name="comment_anchor_11518"></a> <dl id="comment_11518_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(11518, '5468');">引用</a> </span> <a href="http://club.oecr.com/space-uid-45672.html" class="xi2 xw1" c="1">2008kay</a> <span class="xg1 xw0">2017-3-9 15:18</span> </dt> <dd>嘘，低调。</dd> </dl><a name="comment_anchor_11514"></a> <dl id="comment_11514_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(11514, '5468');">引用</a> </span> <a href="http://club.oecr.com/space-uid-60328.html" class="xi2 xw1" c="1">hpshanghai</a> <span class="xg1 xw0">2017-3-9 13:18</span> </dt> <dd>新产品新技术</dd> </dl><a name="comment_anchor_11513"></a> <dl id="comment_11513_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(11513, '5468');">引用</a> </span> <a 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