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.
Transition cross section<br />
<br />
<br />
<br />
For the ideal Lorentzian lineshape in a homogeneously<br />
broadened medium<br />
ĝ() <br />
h<br />
2[( 21<br />
) 2 ( h<br />
/2) 2 ]<br />
The peak value of the lineshape occurs at the center of the<br />
spectrum and is a function of linewidth h only.<br />
2<br />
gˆ ( <br />
21)<br />
<br />
<br />
Thus, the peak value of the emission cross section at the<br />
center wavelength of the spectrum<br />
<br />
e<br />
h<br />
h<br />
2<br />
<br />
2<br />
4<br />
n <br />
<br />
2<br />
sp<br />
33
Change language