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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">与锁模激光器有关的“凯利边带” </h1> <p class="xg1"> 时间：2021-11-16 09:24<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1961)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=9354&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a>来自: 网络平台</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>凯利边带是锁模激光器的光谱的某些边带，由孤子脉冲在激光谐振器中循环时的周期性扰动造成。</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> 凯利边带是锁模<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>器的光谱的某些边带，由孤子脉冲在激光谐振器中循环时的周期性扰动造成。</div><div><br></div><div> 在一个孤子锁模激光器中，孤子脉冲会在激光谐振腔中循环。如果谐振腔中色散和非线性的影响较弱，由于色散和非线性的离散性，脉冲会经历一些微弱的周期性扰动。一些额外的干扰还可能是由于谐振腔内的周期性的损耗或放大。</div><div><br></div><div> 这种定期发生的干扰会使得孤子同一个色散波一起传播。这往往不会产生很大的影响，因为只有孤子会经历非线性，使得孤立和色散波的相对相位是不断变化的。</div><div><br></div><div> 然而，在光纤激光器中有时会发生有谐振耦合（或准相位匹配），使得在某些频率时色散波和光孤子之间的相位会在每次循环中变化2π的整数倍。这会在孤子光谱上形成一些窄峰（参见下图）。</div><div><br></div><div> 这样的窄峰被称为凯利边带。从它们的光谱中的位置，可以得到一些光纤的色散信息。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/202111/16/092353hy16wak4z1q1kykq.png" target="_blank"><img src="data/attachment/portal/202111/16/092353hy16wak4z1q1kykq.png"></a></p></div><div style="text-align: center;"><br></div><div style="text-align: center;"> 孤子光纤激光器的输出的频谱，其具有明显的凯利边带。</div><div><br></div><div> 锁模固体激光器中通常不会发哼凯利边带，但在孤子光纤激光器中则经常能够看到。</div><div><br></div><div> 这是因为，光纤激光器的腔内非线性和色散要比固体激光器大很多。在一个孤子光纤激光器中的非线性相移与脉冲脉宽成反比。</div><div><br></div><div> 因此，通过增加脉冲能量而减小脉冲脉宽可以使得凯利边带更为明显。当激光的凯利边带十分显著时，孤子脉冲变得不稳定。强的凯利边带表明了该脉冲脉宽已经接近其ZUI小值。</div><div><br></div><div><div 0px;"="" 255);"="" 255,="" rgb(255,="" simsun;="" yahei",="" microsoft="" style="overflow-wrap: normal; color: rgb(143, 143, 143); background-color: rgb(255, 255, 255); text-indent: 28px; font-family: 微软雅黑;"><span style="overflow-wrap: normal;">免责声明：编写或转载此文是为了传递更多的信息，为光电行业尽一些绵薄之力。若文字或图片侵犯了您的合法权益或有不当之处，请作者在20个工作日之内与我们联系，我们将协调给予处理。</span></div><div 0px;"="" 255);"="" 255,="" rgb(255,="" simsun;="" yahei",="" microsoft="" start;"="" normal;="" 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