thales 发表于 2003-4-2 10:11:00

固体激光介质Nd:YAG最佳掺杂浓度的讨论!

个人认为如果要好的光束质量那就用低掺杂的,如果要高功率和窄脉宽的还是提高腔的增益,用高点的好,,,,但大功率的好象高也高的不太多。有时我们在做压脉宽实验时,实在没办法了,就换成高增益的棒,效果还可以。

bjltwf 发表于 2004-9-10 06:03:00

连续------低掺杂,脉冲----高掺杂

redbaby 发表于 2004-9-10 20:59:00

掺杂浓度与有效吸收截面和上能级寿命有关,在掺杂为2at%附近两者的乘机最大,这对于低功率的。对于高功率为了减少热透镜及热致双折射,掺杂有是另一回事。

free 发表于 2004-9-10 21:41:00

<P>连续激光器因为要考虑到热效应的影响,所以浓度一般在0.8\0.9的样子,而连续的这方面因素影响要小些,则考虑使用更高浓度的激光棒.</P><P>而且浓度高了,会出现浓度梯度等均匀性和浓度猝灭等问题,所以说浓度选择并不是越高越好.</P>

dsq1980 发表于 2004-9-13 05:18:00

<TABLE fixed; WORD-BREAK: break-all" width="90%" border=0><TR><TD 9pt; LINE-HEIGHT: 12pt" width="100%"><img src="http://bbs.oecr.com/Skins/Default/topicface/face1.gif"> <B></B>
连续------低掺杂,脉冲----高掺杂 </TD></TR></TABLE><P>同意这个观点</P>

Ryan-Gao 发表于 2004-9-13 10:18:00

<P>Good discussions.</P><P>It is not a simple question, because the optimum dopig level depends on the output power level, mode quality (multimode, low order mode or TEM00 mode), pumping and cooling geometry, laser crystal size, and the crystal material. </P><P>Most of the opinion above are valid, you can take them into account when you design a laser, but you need to figure out the optimum doping for your laser by carrying out some experiments. I think you only need to try maximum three diferent doping to find the best one.</P><P>You should always remember that the laser theory is simple, but there are endless engineering work to make a good laser.</P><P>Good luck!</P>

qggq222 发表于 2004-9-13 16:37:00

<P>灯泵和二极管泵的还有很大区别。</P>

fluorolog 发表于 2004-9-14 00:35:00

<DIV class=quote><B>以下是引用<I>tzhhui</I>在2003-3-23 15:51:15的发言:</B>
掺杂浓度不同,工作物质的运转特性不同。掺杂浓度高,吸收效率高,反转粒子数高,激光器的效率高;但浓度过高,激光器的转换效率会不升反降,甚至出现浓度猝灭的现象,总之,工作物质中对应不同的基质材料有某一最佳的掺杂浓度。浓度多少可以通过实验得到;</DIV>

对的,还有就是对于晶体还要看生长情况,有的浓度高了就会不均匀

jwin1357 发表于 2004-9-15 17:47:00

这个问题小弟做过比较深入的研究,不可简单而论,对于不同的腔形,棒的直径有关系,

chenms 发表于 2004-9-19 04:42:00

the discussion here is helpful, but I'm surprised that no any paper/book discusses the topic in details? the topic is supposed to be very old one.

chenms 发表于 2004-9-19 04:45:00

The discussion here is useful. But I'm surprised that there is not any paper/book to discuss this in details? The topic should be very old one.

annespring 发表于 2004-12-6 20:33:00

经过实验测定,在其它情况相同的条件下,掺杂难度为2%时,通光长度在2mm时,效果最好。
页: 1 [2] 3 4
查看完整版本: 固体激光介质Nd:YAG最佳掺杂浓度的讨论!