Saturation Intensity and Power

In summary, the speaker is conducting an experiment involving a laser beam passing through a cell of Rubidium-85 and 87. They were able to change the power of the beam by using different transition rate plates, and obtained spectra's amplitudes and widths for different incident powers. The speaker is unsure how to fit the P_{incident}(A), P_{incident}((\Delta v)^2) values to determine the saturation power and intensity, as they only have 5 data points and the function form is not obvious.
  • #1
ChrisVer
Gold Member
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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 [itex]P_{in}= 100 \mu W[/itex]... Then using different transition rate ([itex]T[/itex]) plates I was able to change the power of the beam...
So I was able to get the spectra's amplitudes [itex]A[/itex] and widths [itex]\Delta v[/itex] for different [itex]P_{incident}[/itex] (check attachments)...

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

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  • #2
Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

FAQ: Saturation Intensity and Power

What is saturation intensity?

Saturation intensity is the point at which a material can no longer absorb any more incident light, resulting in maximum absorption. This is also known as the point of saturation.

How is saturation intensity measured?

Saturation intensity is typically measured in terms of watts per square meter (W/m2) or joules per square centimeter (J/cm2). It can also be measured in terms of optical density, which is the logarithmic measure of transmission.

What factors affect saturation intensity?

The two main factors that affect saturation intensity are the properties of the material, such as its absorption coefficient and thickness, and the intensity of the incident light. Higher absorption coefficients and thicker materials will have higher saturation intensities, while higher incident light intensity will lead to lower saturation intensities.

What is the relationship between saturation intensity and power?

Saturation intensity and power are directly related. As the saturation intensity increases, the power needed to reach that level of saturation also increases. This means that a higher power input is required to reach saturation in materials with higher saturation intensities.

How is saturation intensity used in practical applications?

Saturation intensity is an important concept in fields such as laser technology, where it is used to determine the optimal power levels for different materials. It is also used in photovoltaic cells for determining the maximum amount of incident light that can be converted into electricity. Additionally, understanding saturation intensity can help in designing more efficient and effective optical devices.

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