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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=61" 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">飞秒激光光束整形技术 </h1> <p class="xg1"> 时间：2024-3-7 11:54<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(828)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=9980&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=61" 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>飞秒激光束入射到材料内部的过程中，会存在像差、球差和非线性效应等现象，使得高斯光束经物镜聚焦后，焦点的能量分布一般呈椭球形，甚至条形。焦体积能量分布往往又影响波导横截面、模场形态、耦合损耗和传输损耗。</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> 飞秒<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>束入射到<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>内部的过程中，会存在像差、球差和非线性效应等现象，使得高斯光束经物镜聚焦后，焦点的能量分布一般呈椭球形，甚至条形。焦体积能量分布往往又影响波导横截面、模场形态、耦合损耗和传输损耗。</div><div><br></div><div> 为了控制焦斑能量分布进而控制波导截面形貌，人们提出一系列光束整形技术的方案，比如狭缝光束整形技术、散光光束整形技术、空间光调制器（SLM）整形技术和时空域同步整形技术等。</div><div><br></div><div> 下面我们就详细介绍一下相关的光束整形技术：</div><div><br></div><div> 狭缝整形技术</div><div><br></div><div> 是利用狭缝的衍射效应改善聚焦后的光束能量分布，提高聚焦点光束能量分布的对称性。2004年报道了利用狭缝在硅酸盐玻璃内制备圆形截面波导，并对其原理进行了解释。在聚焦透镜前，狭缝方向平行于激光扫描方向，光在狭缝孔径处发生衍射效应。</div><div><br></div><div> 散光光束整形技术</div><div><br></div><div> 是指在物镜聚焦前，使用散光柱面透镜组对激光束进行像散差整形，从而改善聚焦后的光束能量分布，并进一步提高了聚焦点光束能量分布的对称性，该技术可以被用来制备圆形截面的波导。</div><div><br></div><div> 时空域同步整形技术</div><div><br></div><div> 是指利用一对色散光栅分离激光脉冲中的各频谱成分，生成不同频率的波束阵列，最终在空间上分离的各频谱波束经过物镜同时汇聚于一点，即时空域同步整形技术。</div><div><br></div><div> 空间光调制器整形技术</div><div><br></div><div> 是指对激光光束的振幅、相位和偏振信息进行调制，实现非相干光-相干光的转换，调制光束中的能量分布。简单来说，空间光调制器是由许多μm级控制单元组成，其中每个控制单元都可以独立地接受调制信号，对光波进行精确调制。</div><div><br></div><div><br></div><div><section microsoft="" yahei",="" simsun;="" margin:="" 0px;="" padding:="" background-color:="" rgb(255,="" 255,="" 255);"="" 255);="" overflow-wrap:="" normal;"="" simsun;"="" style="word-wrap: normal; color: rgb(143, 143, 143); font-family: Tahoma, "Microsoft Yahei", Simsun; background-color: rgb(255, 255, 255);"><p style="word-wrap: normal; margin: 0px; padding: 0px 0px 1em; overflow-wrap: 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onclick="portal_comment_requote(34353, '9980');">引用</a> </span> <a href="http://club.oecr.com/space-uid-125237.html" class="xi2 xw1" c="1">Hedgehogly</a> <span class="xg1 xw0">2024-3-7 12:54</span> </dt> <dd>真的不错的网站。</dd> </dl><a name="comment_anchor_34352"></a> <dl id="comment_34352_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(34352, '9980');">引用</a> </span> <a href="http://club.oecr.com/space-uid-17634.html" class="xi2 xw1" c="1">shiloh</a> <span class="xg1 xw0">2024-3-7 12:24</span> </dt> <dd>不要感叹时间总是流逝得太快，一辈子本来就不长。</dd> </dl><a name="comment_anchor_34351"></a> <dl id="comment_34351_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(34351, '9980');">引用</a> </span> <a href="http://club.oecr.com/space-uid-143.html" class="xi2 xw1" c="1">456</a> <span class="xg1 xw0">2024-3-7 11:54</span> </dt> <dd>好吧，可以。</dd> </dl><a name="comment_anchor_34350"></a> <dl id="comment_34350_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(34350, '9980');">引用</a> </span> <a href="http://club.oecr.com/space-uid-91437.html" class="xi2 xw1" c="1">260981458</a> <span class="xg1 xw0">2024-3-7 11:54</span> </dt> <dd>看起来不错</dd> </dl></div> </div> <!--[diy=diycontentcomment]--><div id="diycontentcomment" class="area"></div><!--[/diy]--> </div> <div class="sd pph"> <div class="drag"> <!--[diy=diyrighttop]--><div id="diyrighttop" class="area"><div id="frameG07e2m" class="sy_ltdr frame move-span cl frame-1"><div class="frame-title title"><span class="titletext">社区成员推荐</span></div><div id="frameG07e2m_left" class="column frame-1-c"><div id="frameG07e2m_left_temp" class="move-span temp"></div><div id="portal_block_925" class="cl_block_bm block move-span"><div id="portal_block_925_content" class="dxb_bc"><div class="module cl ml mls"> <ul><li> <a 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