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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">基于低温倍频混合腔放大器的绿光激光器问世 </h1> <p class="xg1"> 时间：2016-11-2 13:31<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1632)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=5004&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>《OPTICS EXPRESS》最近报道了基于低温倍频混合腔放大器的130W绿光激光器。调Q高功率脉冲绿光激光器广泛应用在科研和工业领域，如激光加工，激光材料处理，以及目前最常见的钛宝石飞秒激光器均采用此类激光器作为泵 ...</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> 《OPTICS EXPRESS》最近报道了基于低温倍频混合腔放大器的130W绿光<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>器。调Q高功率脉冲绿光激光器广泛应用在科研和工业领域，如激光<a href="http://optics.oecr.com" target="_blank" class="relatedlink">加工</a>，激光<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>处理，以及目前最常见的钛宝石飞秒激光器均采用此类激光器作为泵浦（以掺Nd类调Q倍频激光器为主）。但这类激光器通常由于光束质量因子（M2因子）大，并且脉宽相对较长，无法应用在精细激光加工等场合。<span style="line-height: 25.2px;">目前已证明，皮秒激光和亚皮秒激光在OPCPA试验中是最为理想的泵浦源，因此研发出高功率，脉宽窄的皮秒绿光激光器的需要十分迫切。低温倍频混合腔放大器的方法正是其中一条有效的途径。</span></div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201611/02/133139s6i3r1tr6h1hs3ii.png" target="_blank"><img src="data/attachment/portal/201611/02/133139s6i3r1tr6h1hs3ii.png"></a></p></div><div><br></div><div> 实验装置如图所示，振荡器是重复频率为78MHz的光纤飞秒锁模激光器，经过CPA系统之后得到了6W，脉宽小于10ps的78 MHz激光脉冲，再经过用液氮冷却的两通Yb:YAG放大器，最终得到了240-287W的皮秒红外激光，波长为1029nm。倍频以LBO作为倍频介质，其原因是因为LBO<a href="http://material.oecr.com" target="_blank" class="relatedlink">晶体</a>有着高的损伤阈值，高的非线性系数，以及相位匹配一类条件下不存在明显的走离效应。用f = 100mm的透镜将1029nm红外光聚焦到LBO晶体中，聚焦光斑大小约为65um。<br><br></div><div><p style="text-align: center;"><a href="http://www.oecr.com/data/attachment/portal/201611/02/132250b8xrerclpl8mbm1e.png" target="_blank"><img src="http://www.oecr.com/data/attachment/portal/201611/02/132250b8xrerclpl8mbm1e.png"></a></p></div><div><br></div><div> 实验表明，当LBO晶体中心被放置在焦点略后方的位置，可以得到最大效率的倍频转换。对LBO晶体的温度进行了精确地控制。随着红外激光的能量的提高，烤炉温度随之降低，以补偿由于LBO晶体吸收绿光产生的热效应。由于LBO对绿光的吸收大于对红外光的吸收，所以在LBO晶体内部存在从后到前的温度梯度，输出面的温度要高于入射面的温度，这一现象在很大程度上限制了LBO晶体的倍频效率。最终该实验得到了130W，重复频率为78MHz的绿光输出，波长为514.5nm，脉宽为6.4ps，倍频效率为54%，这是目前已有报道中倍频效率最高的绿光皮秒激光器。</div><div><br></div><div><p style="line-height: 25.2px; text-align: center;"><a href="http://www.oecr.com/data/attachment/portal/201611/02/132617yqq8mv02nhvwq00q.jpg" target="_blank"><img src="http://www.oecr.com/data/attachment/portal/201611/02/132617yqq8mv02nhvwq00q.jpg"></a></p><p style="line-height: 25.2px; text-align: center;"><br></p><p style="line-height: 25.2px; 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" 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c="1">shh028</a> <span class="xg1 xw0">2016-11-3 07:57</span> </dt> <dd>鄙视看了不回的，这么多人看，这么几个回复。</dd> </dl><a name="comment_anchor_9197"></a> <dl id="comment_9197_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(9197, '5004');">引用</a> </span> <a href="http://club.oecr.com/space-uid-77098.html" class="xi2 xw1" c="1">xm8801</a> <span class="xg1 xw0">2016-11-3 02:56</span> </dt> <dd>光电工程师社区 不错</dd> </dl><a name="comment_anchor_9191"></a> <dl id="comment_9191_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(9191, '5004');">引用</a> </span> <a href="http://club.oecr.com/space-uid-71226.html" class="xi2 xw1" c="1">crestman</a> <span class="xg1 xw0">2016-11-2 23:56</span> </dt> <dd>收到邮件特地来看看，真有些感动啊。</dd> </dl><a name="comment_anchor_9182"></a> <dl id="comment_9182_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(9182, '5004');">引用</a> </span> <a href="http://club.oecr.com/space-uid-45898.html" class="xi2 xw1" c="1">cdtt1</a> <span class="xg1 xw0">2016-11-2 19:26</span> </dt> <dd>没想到还能这样。</dd> </dl><a name="comment_anchor_9174"></a> <dl id="comment_9174_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(9174, '5004');">引用</a> </span> <a href="http://club.oecr.com/space-uid-31198.html" class="xi2 xw1" c="1">lucy99</a> <span class="xg1 xw0">2016-11-2 15:26</span> </dt> <dd>确实还可以。</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" 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