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</div> <div class="bm"> <div class="bm_c xld"> <b>高手推荐激光二极管驱动电路的一些资料:</b><div class="postmsg">书籍的名字，或一些相关文章</div> <div class="postmsg">2．2 LD的驱动电路<br /> <br /> 由于半导体（LD）受激辐射的复合时间和腔体内光子的寿命很短，又加上它的辐射光发散角小，与光纤的耦合效率高，入纤光功率大，所以在光纤光栅传感器中用它来作光源。与LED相比，LD的驱动要复杂的多。尤其是在高速率调制系统中，驱动条件即I 和I 的选择、驱动电路的形式以及激光器的控制等问题，都对调制性能有重要影响。下面讨论这些问题。<br /> 2.2.1放大电路的选择<br /> 由于LD的驱动需要非常稳定的工作电流，所以在里选用了LM358这个低功耗的双运放模块。<br /> 将信号按比例放大的电路，可以简称为比例电路和比例运算放大电路。对深度负反馈电路的分析已知可以集成运放和电阻构成比例电路。它有反相输入和同相输入两种不同的形式。<br /> 1.反相比例电路<br /> <br /> 电压并联深度负反馈电路的输出电压怀输入电压之比的绝对值基本上等于反馈电阻怀信号源内阻之比。因此可以用右图所示的电路实现比例运算。图中R1怀信号源相串联其作用与信号内阻Rs类似。由于这个电路的输入信号从集成运放的反相输入端引入，因而称为反相比例电路 。<br /> 电路中集成运放的同相输入端接有电阻R’，这是因为集成运放输入级是由差动放大电路组成，它要求两边的输入回路参数对称，即从集成运放反相输入端和地两点向外看的等效电阻Rn应当等于从集成运放同相输入端和地两点向外看和等效电阻Rp，即<br /> <br /> <br /> 上述对称条件，对于各种双极型晶体管集成运放构成的运算电路和放大电路 是普遍适用的。但有时（例如集成运放是高阻型， 很小）对此要求并不严格。<br /> 对于上图电路，设输入信号源的内阻为零，或者把信号源内阻计算到电阻R1中去，则<br /> <br /> <br /> <br /> 反相比例电路的主要特点如下：<br /> 1.集成运放的反相输入端为虚地点，它的共模输入电压可视为零。因此对运放的共模抑要求低。<br /> 2.由于电压负反馈的作用、输出电阻小、通常可将Ro视为零。因此带负载能力强。<br /> 3.由于并联负作用，输入电阻小，通常可认为Ri=R1.因此对输入电流有一定的要求。<br /> <br /> 2.同相比例电路<br /> 前面提到反相比例电路的输入电阻小，如果希望输入电阻大，且Uo怀Ui按一定比例同方向变化，那么可将信号接到运放的同相输入端，并在反相输入端引入负反馈，如下图所示。<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> 同相比例电路的主要特点是：<br /> 1.由于引入的负反馈属于电压串联的形式，所以能使输入电阻大（1+AF）倍，可高达1000MΩ以上。<br /> 2.同理输出电阻也减小到 ，一般可视为零。<br /> 3.由于U_=U+=Ui，即同相比例电路中集成运放的共模电压等于输入电压，因此对集成运放的共模抑制比要求较高。这是它的缺点<br /> 3.1驱动电路的主要器件<br /> <br /> 3．1．1 LM385、LM358、TIP122<br /> 1．LM358双运算放大器<br /> LM358双运算放大器的供电范围很大，可以从3 V ～ 30 V，并且可以用单电供应，也可以用双电供应十分方便。LM358具有低耗电电流的优点，一般为0.7mA；具有电压公共输入端，包括接地，并且允许直接接地；具有低输入偏移和补偿量（输入补偿电压3mV、输入补偿电流2nA、输入偏流2nA）。差分输入电压范围等于最大额定供给电压为±32V。开路差分电压放大100V/mV。<br /> 这个芯片是由两个独立的、高增益的、运用频率补偿的放大器组成。此芯片可用单电供应，并且电压范围广泛。输入耗电电流的大小与输入电压的大小无关。由于可实现单电供应，因此LM358被广泛的应用于传感放大器、直流放大区和所有常用的运算放大电路。以下是它的内部结构图<br /> 2.稳压管LM385<br /> LM385的工作电流范围是20μA~20mA,有1.5%~3%的初始电压差。LM385在25℃时，其阻抗参数值最大为1Ω。LM385还具有低消耗的特点，它应用于便携式检测仪器、电力操作系统、回路电流使用仪器等等。由于它有低消耗功率的特点，因此它经常用于低电流的电子电路。它还具有非常强的稳压功能，稳压范围大可稳住上下波动为40mV的电压。它的常用符号为： <br /> 以下是它的内部结构图：<br /> 3.复合管TIP122<br /> 复合管TIP122具有较大的放大倍数，并且有很强的带负载能力。h参数位<br /> hFE =2500 (Typ) 。其参数如下：<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> 3.1.2 半导体激光器980LD<br /> 这个元件的全称为980nm泵辅激光模块。它是作为掺铒光纤放大器的泵辅源而设计的。它可以在宽温度范围内输出80mw到280mw的激光。所以它广泛的应用于低噪音掺铒光纤放大器<br /> <br /> 1.规格<br /> 参数最小标准最大单位<br /> 门限电流20.025.0MA<br /> 驱动电压160250MA<br /> 峰值波长975975985Nm<br /> 975-985nm频带中功率8595%<br /> 检测响应电流2.51525ΜA/mW<br /> 检测电流50Na<br /> 热耦电阻（25℃）9.51010.5KΩ<br /> 设计工作温度202530℃<br /> 激光温度23.526.5℃<br /> 热泵电流2.5A<br /> 热泵电压2.5V<br /> <br /> 绝对的标称值<br /> 参数最小标准最大单位<br /> 工作温度-202575℃<br /> 存储温度-402075℃<br /> 激光正向电压500MA<br /> 激光响应电流2V<br /> 热泵电流2.5A<br /> 铅焊接温度260℃<br /> 光纤曲率30mm<br /> <br /> 引脚定义<br /> 引脚引脚<br /> 1 制冷 （+）8 N/A<br /> 2 热电耦9 N/A<br /> 3 监视 （+）10 laser (+)<br /> 4 监视 （-）11 laser (-)<br /> 5 热电耦12 N/A<br /> 6 N/A13 外壳接地<br /> 7 N/A14 制冷 （-）<br /> <br /> <br /> </div> <div class="postmsg">keqiaoer :你的文章是那本书里摘得？luzq@21cn.com</div> <div class="postmsg">你的二极管是那种，我这里有资料，免费赠送：）<br /> fattank@21cn.com</div> <div class="postmsg">可以把资料发给我一份吗？？我们正在做LD的驱动，已经做出一个2A的电源，但是不是很好，希望能得到你的支持与帮助，谢谢！gxs1980@sina.com</div> <div class="postmsg">我也想邀，gaoxun2002@sohu.com谢谢了<br /> </div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>我正在做，激光二极管的驱动电路，能不能发给我一份。</P><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>同时，谁有这方面的电路，可否提供一个，我找了几个感觉不好！！！</P><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>有的话，请跟我联系，可以提供经济支持，以表谢意！！</P><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>我的邮箱是：<a href="mailto:xiaojinle1982@163.com" target="_blank" >xiaojinle1982@163.com</A></P><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>谢谢大家的帮助！！！</P></div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>电路图可参考这里。另外，LM358实际工作电压可低到2.2V，假设共模输入电压和输出电压不是很高的情况下。</P><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />><a href="http://www.shoudian.com/dispbbs.asp?BoardID=31ID=13056" target="_blank" >http://www.shoudian.com/dispbbs.asp?BoardID=31ID=13056</A></P></div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />RE>请教lymex这位大哥</PRE><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />RE>我看了那个网址链接的电路图，可是有几处不明白，现在想请教你。</PRE><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />RE>1.图中LD的地方怎么有两个图标，是不是两个都是激光二极管。</PRE><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />RE>2.另外图中，有几处参数的值没有单位？比如C1右边的33、C5的下边怎么是二极管的图标？且右边怎么是475</PRE><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />RE>3.在中间多出来LED，这一块干吗？</PRE><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />RE>再次感谢你的指教！！</PRE></div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>1、LD另外一边的是保护二极管<BR>2、没有单位的是基本单位，D2/C5标反了<BR>3、LED是指示用的，不用也可。</P></div> <div class="postmsg"><p>楼主：能否传一份资料给我？我正在研究LD,谢谢</p><p><a href="mailto:hcw0755@126.com">hcw0755@126.com</a></p></div> <div class="postmsg">附件为分离元件与IC驱动的比较。如有疑问，请联系 <br /> <a href="mailto:xu.yibin@weltronics.com">xu.yibin@weltronics.com</a> <br /> <a href="mailto:ichaus@sina.com">ichaus@sina.com</a> <br /> 0755-8348 0330</div> <div class="postmsg">供应激光二极管驱动电源<br /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /></div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>yangle908</i> 于 2007-10-17 11:34 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=384745&ptid=16631" target="_blank"><img id="aimg_DP3BU" 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 /> 供应激光二极管驱动电源<br /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /> <img src="static/image/smiley/default/victory.gif" smilieid="14" border="0" alt="" /> </blockquote></div><br /> 崩溃了<br /> 哈哈哈哈哈哈哈哈哈哈哈哈</div> <div class="postmsg">怪<br /> 。。。。。。。。。。。。。。</div> <div class="postmsg">那位回答一下：大功率的半导体激光二极管电源是不是很贵？国内有哪家做得较好？</div> <div class="postmsg">我想找一个LASER驱动电路，频率在64k～2048k，要APC，大侠帮忙推荐一下，谢谢！<br /> <a href="mailto:guolh@163.com">guolh@163.com</a></div> <div class="postmsg">有没有小功率的呀,我要小功率的电路~~~</div> <div class="postmsg">高手推荐激光二极管驱动电路的一些资料<br /> <br /> <br /> 你的二极管是那种，我这里有资料，免费赠送：）<br /> <a href="mailto:fattank@21cn.com">fattank@21cn.com</a><br /> <br /> <br /> 请给我一份,谢谢!<br /> <br /> <a href="mailto:myourmy@126.com">myourmy@126.com</a></div> <div class="postmsg">请给我一份<br /> <br /> <br /> 高手推荐激光二极管驱动电路的一些资料<br /> <br /> <br /> 你的二极管是那种，我这里有资料，免费赠送：）<br /> <a href="mailto:fattank@21cn.com">fattank@21cn.com</a><br /> <br /> <br /> 请给我一份,谢谢!<br /> <br /> <a href="mailto:yang588588@sohu.com">yang588588@sohu.com</a></div> <div class="postmsg">几百元一套的,可以定做,<br /> 也有小的恒功率驱动电路<br /> 及各种波长功率激光二极管<img src="static/image/smiley/default/em28.gif" smilieid="57" border="0" alt="" /> <img src="static/image/smiley/default/em28.gif" smilieid="57" border="0" alt="" /> <br /> 755-25432256</div> <div class="postmsg">能不能给我发一份激光二极管驱动电路的资料，谢谢！<br /> <a href="mailto:junyi_hu@yahoo.com.cn">junyi_hu@yahoo.com.cn</a></div> <div class="postmsg">能不能给我发一份激光二极管驱动电路的资料，谢谢！<br /> <a href="mailto:junyi_hu@yahoo.com.cn">junyi_hu@yahoo.com.cn</a></div> <div class="postmsg">请给我发一份吧，最近正做这方面的，谢谢</div> <div class="postmsg">请给我发一份吧，最近正做这方面的，谢谢，邮箱：<a href="mailto:yangdeguo5872@126.com">yangdeguo5872@126.com</a></div> <div class="postmsg">我们用的激光二极管是红光808nm，功率有200mw和300mw两种，那位有合适的电路驱动，请给我发一份，谢谢。<a href="mailto:yangdeguo5872@126.com">yangdeguo5872@126.com</a></div> <div class="postmsg">好东西呀！一般半导体激光二极管的工作频率在多少？</div> <div class="postmsg">请给我一份,谢谢!<br /> <a href="mailto:hejunbok@sina.com">hejunbok@sina.com</a></div> <div class="postmsg">也给我一份,谢谢!<br /> <a href="mailto:Kersir@163.com">Kersir@163.com</a></div> <div class="postmsg">发现激光相关的资料好少…………</div> <div class="postmsg">正在研究激光二极管的驱动电路，能不能发给我一份。谢谢（链接打不开）<br /> <a href="mailto:misswjx_ok@163.com">misswjx_ok@163.com</a></div> <div class="postmsg">请给我一份，谢谢！<a href="mailto:junhanwan@126.com">junhanwan@126.com</a></div> <div class="postmsg">能不能给我发一份激光二极管驱动电路的资料，谢谢<br /> <br /> <a href="mailto:liu.liang84@163.com">liu.liang84@163.com</a></div> <div class="postmsg">LZ能不能发我一份啊，万分感谢<a href="mailto:xujiaming123@hotmail.com">xujiaming123@hotmail.com</a></div> <div class="postmsg">可否能給我一份嗎?我mail是<a href="mailto:barryy0114@gmail.com">barryy0114@gmail.com</a><br /> 哈哈哈在此先謝過啦!</div> <div class="postmsg">我也要 我也要<br /> <a href="mailto:barryy0114@gmail.com">barryy0114@gmail.com</a></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 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