# Saturation Intensity and Power

1. Nov 3, 2014

### ChrisVer

Hi, I am not sure if this is an easy question, but I've been looking around and I haven't been able to find some exact equation to this.
I performed an experiment where I allowed for a laser beam to go through a cell (of Rubidium-85 and 87) and got the resulting spectrum. The initial [100%] power was $P_{in}= 100 \mu W$... Then using different transition rate ($T$) plates I was able to change the power of the beam...
So I was able to get the spectra's amplitudes $A$ and widths $\Delta v$ for different $P_{incident}$ (check attachments)...

How is the $P_{incident}(A), P_{incident}((\Delta v)^2)$ can give the saturation power $P_{sat}$ and intensity $I_{sat}$ ? In fact I don't know with what function to fit these $P$'s since I only got 5 values and the function form is not obvious.

File size:
57.8 KB
Views:
84
File size:
59 KB
Views:
89
File size:
56.4 KB
Views:
86
File size:
55.8 KB
Views:
87
2. Nov 8, 2014