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Jared lab notebook: Difference between revisions
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--[[User:Jmiles2|Jmiles2]] ([[User talk:Jmiles2|talk]]) 15:54, 3 December 2014 (CST)
Checked the Beam size of the Coupling beams, I thought they hadn't changed since the last time, but ChB was ~2 mm diameter 1/e^2 and ChC was ~1.7 mm diameter 1/e^2. Probe was still about 2.6 mm. Bigger than the coupling beam but it makes alignment much easier, and there is plenty of power to use for the Probe.
--[[User:Jmiles2|Jmiles2]] ([[User talk:Jmiles2|talk]]) 15:21, 9 January 2015 (CST)
We are trying the experiment with different m levels. Part of the hyperfine repumper is used as a pump to get most of the atoms into the m=0 F=1 level. This way we can more easily model what will happen with the EIT pulses.
I'm also trying the experiment with higher intensity lasers. My model shows less oscillations in the populations of the three levels over time, and therefore the system reaches a steady state faster
Some data taken today shows that there is a difference with EIT between the two coupling beams. I want took transfer data from 1 of the coupling beams. Then I put the beam into the other fiber launch, so it's propagating in the opposite direction. The two transfer curves did not look the same, but I didn't check the beam sizes. I want to try this again more thoroughly because this could be a big deal... I don't know why they would be different though.
I check to see if either beam was clipping the chamber, and it seems that both are missing the chamber and a large amount of the power is going out the otherside.
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