Lecture 8: Laser amplifiers
Lecture 8: Laser amplifiers
Lecture 8: Laser amplifiers
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Four-level pumping<br />
Pump R<br />
<strong>Laser</strong> W i<br />
-1<br />
<br />
Rapid<br />
decay<br />
<br />
Rapid<br />
<br />
decay<br />
<br />
Short-lived |3><br />
Long-lived |2><br />
Short-lived |1><br />
Ground state |0><br />
<br />
Here we assume that the rate of pumping into level 3, and out<br />
of level 0, are the same.<br />
91<br />
91