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class="postmsg">不会，真不会。。。<img src="static/image/smiley/default/em34.gif" smilieid="63" border="0" alt="" /><img src="static/image/smiley/default/em34.gif" smilieid="63" border="0" alt="" /></div> <div class="postmsg">结电容和本征吸收区的厚度直接影响到器件的工作速率和灵敏度。<br /> 但是有源区厚度过小,电流倍增会降低,.<br /> 我是学理论的,还没有实践.</div> <div class="postmsg">both of you are master on this</div> <div class="postmsg">主要還是溫度對逆偏(Vb)(reverse breakdown voltage)影響這問題比較嚴重<br /> 不然一般我們使用APD其工作電壓(working voltage)會在於靠近max逆偏(Vb)<br /> get max gain( M) ------- multiplication factor<br /> 如果你要是 max. M-------------control your reverse voltage (MAX)<br /> Be careful with burning your apd</div> <div class="postmsg"><i class="pstatus"> 本帖最后由 V3765TU 于 2009-10-28 22:39 编辑 </i><br /> <br /> 做一个微电流的放大电路，用于监控APD上的电流是否过大。<br /> 输出的模拟电压用于控制反偏高压。<br /> <br /> 光看信号是不行的，电压过高和过低时都会没有信号。<br /> 监控好的管子不会有问题。我给APD加的高压就是监控的，目前我还没有碰到过失效的APD。<br /> <br /> 我手上有几片PerkinElmer厂家测过的C30737系列APD。<a href="mailto:7086991@163.com">7086991@163.com</a></div> <div class="postmsg">8楼的兄弟说的很对，一般我们通过测试击穿电压来确定给APD家多大的电压，但是每个厂家所给的击穿电压的测试方法是有区别的，比如有的公司采用M=10作为击穿电压，有的公司采用M=100作为击穿电压，这是我们在选用的时候就会出现误区，我们到底该怎样应用这个管子，所以一般我们使用的时候采用M=10的器件一般采用95%击穿电压值，对于M=100的器件，我们加90%的击穿电压。<br /> 所有的探测器都是依靠电场将入射光产生的电子空穴对移向两个电极的，所加的电压对应的电场强度，因此高压能够提高本征区的厚度，但是能够降低结电容，因此要通过仿真和计算哪一点最恰当，同时提高高压能够显著的提高有源区的电场强度，增加倍增效率，但是APD承受的电流是有限的，一般不超过3mA，所以要保证整个APD的所有的光功率下都不超过这个电流值，同时电压太低器件又会出现饱和问题，因此要恰当的选取串联保护电阻和温度补偿电阻，避免上述的两种问题发生。</div> <div class="postmsg">电压过大，容易造成管芯击穿。。。。。。。。。。。。。。</div> <div class="postmsg">xuexile,dingyige...........................</div> <div class="postmsg">你可以先大致确定APD的击穿电压 我们一般取的是在暗电流达到10mA时候的 电压为其击穿电压 再重0.9Vbr往上增加慢慢电压 测试其灵敏度 可以通过描点来确定其最优的反片电压</div> <div class="postmsg">这个根据APD 的SPEC定的 各种电压都有的</div> <div class="postmsg">我公司提供的美国DLI公司的单层电容有在ADP上使用，具体型号为：D35BV102M5PZT</div> <div class="postmsg">一般都是取低于暗电流小于10个微安的时候的电压吧！！具体去90%，95%，97%你可以瞄下点，看在那个电压下的灵敏度最好！！</div> <div class="postmsg">很久没有上自己的空间了，看来以后要常来来！</div> <div style="height200px;"></div> </div> </div> </div> </div></div> </div> <!--autocomment filter by maxnum--> <div class="ft_wp"> <div id="ft" class=" cl"> <div id="flk" > <p> <a href="http://wpa.qq.com/msgrd?V=3&Uin=20600600&Site=光电工程师社区&Menu=yes&from=discuz" target="_blank" title="QQ"><img src="static/image/common/site_qq.jpg" alt="QQ" /></a><span class="pipe">|</span><a href="http://m.oecr.com" >手机版</a><span class="pipe">|</span><a href="http://so.oecr.com" title="站内搜索" target="_blank" >搜索</a><span class="pipe">|</span><a href="http://www.focaloptics.com" title="主办单位：武汉焦点光学技术有限公司" target="_blank" >焦点光学</a><span class="pipe">|</span><a href="http://www.oecr.com" target="_blank">光电工程师社区</a> ( <a href="http://beian.miit.gov.cn/" target="_blank">鄂ICP备17021725号-1</a> <a href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=42011102000821" target="_blank">鄂网安备42011102000821号</a> ) <span id="tcss"></span><script type="text/javascript" src="http://tcss.qq.com/ping.js?v=1eOg" charset="utf-8"></script><script type="text/javascript" reload="1">pgvMain({"discuzParams":{"r2":"1028778","ui":0,"rt":"plugin","pn":1,"qq":"000"},"extraParams":""});</script></p> <p class="xs0"> <span id="debuginfo"> Copyright 2015 光电工程师社区 版权所有 All Rights Reserved. </span> </p> </div> <div id="ftl" > <p>申明：本站为非盈利性公益个人网站，已关闭注册功能，本站所有内容均为网络收集整理，不代表本站立场。如您对某些内容有质疑或不快，请及时联系我们处理！ </p> </div> <div id="frt" > <div class="wp"> <p class="dd01"> © 2001-2022 <a href="http://www.oecr.com" target="_blank">光电工程师社区</a> 网站备案号：<a href="https://beian.miit.gov.cn/">鄂ICP备17021725号</a> 网站公安备案号：<a href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=42011102000821">鄂42011102000821号</a> Powered by <a href="http://www.discuz.net" target="_blank">Discuz!</a> <em>X3.2</em> </p><p class="dd02">GMT+8, 2025-12-17 03:45 </p> </div> </div></div> </div> </div> <!--bottombg结束--> <script src="home.php?mod=misc&ac=sendmail&rand=1765914348" type="text/javascript"></script> <!--<div id="scrolltop"> <span hidefocus="true"><a title="返回顶部" onclick="window.scrollTo('0','0')" class="scrolltopa" ><b>返回顶部</b></a></span> </div> --> <div id="scrolltop"> <span hidefocus="true"><a title="返回顶部" onclick="window.scrollTo('0','0')" class="scrolltopa" ><b>返回顶部</b></a></span> </div> <script type="text/javascript">_attachEvent(window, 'scroll', function () { showTopLink(); });checkBlind();</script> <div id="discuz_tips" style="display:none;"></div> <script type="text/javascript"> var tipsinfo = '1028778|X3.2|0.6||0||0|7|1765914348|a93feb9d0b6fcb7f66807368cc0ce935|2'; </script> <script src="http://discuz.gtimg.cn/cloud/scripts/discuz_tips.js?v=1" type="text/javascript" charset="UTF-8"></script></body></html>