什么是烧孔效应

激光是由于受激辐射和光腔的选模作用实现的,它的单色性好,相干性好,方向性好,亮度高。激光器通常工作于多模振荡,表现为空间上产生多模横振荡,纵向上具有多个频率组分的振荡。介质的增益饱和效应有均匀加宽的增益饱和效应与非均匀加宽的增益饱和效应,它们影响激光器的输出激光。均匀加宽稳定激光器应为单纵模输出,但激光较强时,会出现多纵模振荡。激光越强,振荡模式就会越多。当频率为 的纵模在谐振腔内产生稳定振荡时,腔内就会形成驻波场,波腹处的光强最大,波节处的光强最小。频率为 的模在腔内的平均增益系数为 ,但轴向上各点的反转集居数密度和增益系数不同,波腹处增益系数最小,波节处增益系数最大,这一现象为增益的空间烧孔效应

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.