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<li>资料大小: 2.92 MB</li> <li>下载次数: 42</li> <li>上传会员: <a href="attachcenter-list.html?uid=9544" target="_blank" style="color:#FF9900">yydyyd</a></li> <li>上传时间: 2008-07-14</li> <li>本站网址: <a href="http://forum.oecr.com/">forum.oecr.com</a></li> <li><a href="http://bbs.oecr.com/thread-72292-1-1.html" target="_blank">查看资料所在的主题</a></li> <li><a href="http://bbs.oecr.com/forum.php?mod=attachment&aid=Mjg5MDN8NjEyYTExOTV8MTc2NjQzNjg4OXwwfDA%3D" target="_blank" style="color:#FF9900">下载资料 </a></li> </ul> </div> <DIV style="CLEAR: both"></DIV> <b>欢迎下载本站资料，下载前请先登录您的社区账号。</b></div> </div> <DIV style="CLEAR: both"></DIV> <div class="bm cl" style="padding:5px;"> <p><button type="submit" class="pn vm" onclick="setCopy('http://forum.oecr.com/plugin.php?id=attachcenter:page&aid=28903', '链接已经复制到剪贴板');" type="submit"> <em>复制链接推荐给好友</em></button> <input type="text" class="px vm" onclick="this.select();setCopy(this.value, '链接已经复制到剪贴板');" value="http://forum.oecr.com/plugin.php?id=attachcenter:page&aid=28903" size="50" /></p> </div> <div class="bm"> <div class="bm_c xld"> <b>电光调Q的问题:</b><div class="postmsg"><img src="static/image/smiley/default/sad.gif" smilieid="2" border="0" alt="" /> <br /> <font size="4"><font color="darkred">做了一台氙灯泵浦电光调Q Nd：YAG激光器，遇到一个棘手问题，请朋友们讨论一下可能是什么原因？<br /> Nd：YAG激光器，平平腔，输出镜T=80%，储能电容80uF，重复频率1Hz。<br /> 静态时，阈值电压280V，电压增加过程中输出能量随之增加，当电压700V时，输出能量约270mJ；1000V时，能量可达800mJ。<br /> 使用了KD*P、1/4波片和偏振镜电光调Q，动态阈值约300V，电压增加至700V时，输出能量增加到210mJ，然后再增加电压时，动态出光能量却上不去，当电压增加至1000V时，出光能量反而降到200mJ。<br /> 输出腔镜先后更换成T=85%和T=75%，情况并无显著变化。<br /> 朋友们遇到类似情况吗？可能是什么原因？请大家帮我出出主意！</font></font><br /> <font size="4"><font color="#8b0000"></font></font> <br /> <font size="4"><font color="#8b0000"></font></font> <br /> 另：上传两本光学方面的资料，给感兴趣的朋友。<br /> <br /> [<i> 本帖最后由 yydyyd 于 2008-7-14 18:42 编辑 </i>]</div> <div class="postmsg">Advanced Optical Technology Concepts.pdf (1.28 MB) <br /> 跟光学完全没关系啊。是有关电脑网络技术的。是不是传错了？</div> <div class="postmsg">我估计是热的方面的问题，调Q以后和 静态工作，热是完全不一样的，你必须针对性的调整一下腔的参数，腔长或曲率等<br /> <br /> [<i> 本帖最后由 shizh 于 2008-7-14 10:41 编辑 </i>]</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>kitten5205</i> 于 2008-7-14 09:07 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466145&ptid=72292" target="_blank"><img id="aimg_txt3w" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> 楼主所说的情况倒是没有遇到过。从上面数据看来，楼主的这台激光器没有调Q的时候电光转换效率相当不错。建议看看在输入电压1000V的时候是不是关住门了。在1000V的情况下调关门时，确定一下是偏振方向匹配好了关住门了 ... </blockquote></div><br /> <br /> <br /> 今天测试了一下，在电压1000V，Q开关关门时，漏光只有0.5mJ，应该认为关门还是不错的。Q开关加电后，仔细调整腔镜、晶体和1/4波片，今天调到最高输出能量也只有到250mJ（电压1000V），同时测量偏振片的反射光，有30mJ，是不是晶体电压有什么问题？可是在600V泵浦灯电压下，动静比却有80%啊！</div> <div class="postmsg">再次测试了，调整晶体和波片，偏振片后没有漏光了，可现象依旧。为什么较高的注入能量时，动静比显著下降？</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>shizh</i> 于 2008-7-14 10:40 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466175&ptid=72292" target="_blank"><img id="aimg_G6J7p" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> 我估计是热的方面的问题，调Q以后和 静态工作，热是完全不一样的，你必须针对性的调整一下腔的参数，腔长或曲率等 </blockquote></div><br /> <br /> 同意改变腔长或者曲率的看法，调Q后激光器可能超出了热稳区！</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>bobby2006</i> 于 2008-7-15 08:22 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466356&ptid=72292" target="_blank"><img id="aimg_eCfK9" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> <br /> <br /> 同意改变腔长或者曲率的看法，调Q后激光器可能超出了热稳区！ </blockquote></div><br /> <br /> 也许有点道理，我再试试看。</div> <div class="postmsg">这是典型的热饱和问题，缩短腔长试试看</div> <div class="postmsg">N多研究所爱用平平腔做这种激光器，方便使用自调焦望远镜安装。<br /> 腔长估计是250到300之间。做出来动态很难上400mJ。</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>laser.f</i> 于 2008-7-16 09:05 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466627&ptid=72292" target="_blank"><img id="aimg_H94rZ" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> N多研究所爱用平平腔做这种激光器，方便使用自调焦望远镜安装。<br /> 腔长估计是250到300之间。做出来动态很难上400mJ。 </blockquote></div><br /> 为什么要用自调焦望远镜安装呢？一个几十块的激光二极管不就搞定了吗？</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>再也不能这样</i> 于 2008-7-16 09:32 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466638&ptid=72292" target="_blank"><img id="aimg_cvMRM" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> <br /> 为什么要用自调焦望远镜安装呢？一个几十块的激光二极管不就搞定了吗？ </blockquote></div><br /> <br /> 一，某些军用的工艺要求不许用垫片以及胶水，要研磨底座来对准，自调焦望远镜是少不了的。<br /> 二，因为老毛子说了，要这样装。所以要这样装。<br /> 三，因为别的研究所说了，要这样装。所以要这样装。<br /> 四，因为师傅说了，要这样装。所以要这样装。<br /> 五，研究所的工艺细则上说了，要这样装。所以要这样装。<br /> 六，如果没遵守以上五条影响了当月生产，所有黑锅你背。</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>laser.f</i> 于 2008-7-16 09:49 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466644&ptid=72292" target="_blank"><img id="aimg_f1YVP" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> <br /> <br /> 一，某些军用的工艺要求不许用垫片以及胶水，要研磨底座来对准，自调焦望远镜是少不了的。<br /> 二，因为老毛子说了，要这样装。所以要这样装。<br /> 三，因为别的研究所说了，要这样装。所以要这样装。<br /> 四，因为师傅说 ... </blockquote></div><br /> <br /> 呵呵，Laser.f兄真是幽默。不过你说的第一条是指要求激光束在激光器的设计光轴上吗？自准直镜虽能保证激光束与设计光轴平行，但如何防范侧向偏移呢？还是用小红光LD的细光束经俩小孔三点定位比较实惠吧。<br /> <br /> [<i> 本帖最后由 再也不能这样 于 2008-7-16 10:09 编辑 </i>]</div> <div class="postmsg">楼上说的那种方法对研磨底座这种工艺精度不够。<br /> 并且研究所是不考虑实惠这个问题的。</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>laser.f</i> 于 2008-7-16 10:19 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466654&ptid=72292" target="_blank"><img id="aimg_Lk8iB" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> 楼上说的那种方法对研磨底座这种工艺精度不够。<br /> 并且研究所是不考虑实惠这个问题的。 </blockquote></div><br /> 哦，这么高的要求啊。我们也在为这种事情头痛，老被人说激光偏。有些公司干脆用大腔包小腔的方法，通过调整小腔和大腔的相对方位来对准光束。<br /> <br /> [<i> 本帖最后由 再也不能这样 于 2008-7-16 14:12 编辑 </i>]</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>再也不能这样</i> 于 2008-7-16 11:09 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466675&ptid=72292" target="_blank"><img id="aimg_phKqE" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> <br /> 哦，这么高的要求啊。我们也在为这种事情头痛，老被人说激光偏。有些公司干脆用小腔包大腔的方法，通过调整小腔和大腔的相对方位来对准光束。 </blockquote></div><br /> <br /> 什么激光偏？激光束光束方向相对于激光器出口？小腔包大腔又是什么东东？</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>wwwcai</i> 于 2008-7-16 12:10 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466697&ptid=72292" target="_blank"><img id="aimg_xm510" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> <br /> <br /> 什么激光偏？激光束光束方向相对于激光器出口？小腔包大腔又是什么东东？ </blockquote></div><br /> <br /> 就是说激光束偏离激光器的设计光轴。<br /> 对不起刚才打错了。是说“大腔包小腔”，指激光器做在一块独立的板或盒上，然后再放进更大的壳（腔）体里，调节这两部份的相对位置，令激光输出严格同大腔的设计光轴重合。<br /> <br /> [<i> 本帖最后由 再也不能这样 于 2008-7-16 14:13 编辑 </i>]</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>再也不能这样</i> 于 2008-7-16 14:11 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466731&ptid=72292" target="_blank"><img id="aimg_VowvK" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> <br /> <br /> 就是说激光束偏离激光器的设计光轴。<br /> 对不起刚才打错了。是说“大腔包小腔”，指激光器做在一块独立的板或盒上，然后再放进更大的壳（腔）体里，调节这两部份的相对位置，令激光输出严格同大腔的设计光轴重合。 </blockquote></div><br /> <br /> 哦，这样子，调激光器也经常发现激光束和设计的光轴不一样。对于激光器的用户来说，不关心你激光器里面光路是怎么走的，输出的激光束和激光输出出口的轴一致就可以了吧。</div> <div class="postmsg">针对热效应问题开展了实验。把全反镜先后由平面改变成凹面和凸面，凹面镜输出能量变化不大，凸面镜输出能量不仅没有提高，反而比平面腔镜下降了。</div> <div class="postmsg">改成凸面镜后增加了高阶模的衍射损耗，比用平面镜时输出能量下降情有可原。你有没有做在平面镜时减小腔长的实验，可以试试</div> <div style="height200px;"></div> <ul class="xl xl2 cl" style="border-top: 1px #cccccc dashed;margin:5px 0 ;padding-top:5px"> <dl><b> 同一主题资料:</b></dl><dl class='icon'><img src="static/image/filetype/pdf.gif" border="0" class="vm" alt="" /> <a href="attachcenter-page.html?aid=28891" 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