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Jared lab notebook: Difference between revisions
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The asymmetry problem still occurs, and is very apparent depending on which beam's frequency I scan over. For a standing wave from 3 to 40 mW, scanning over the higher power coupling beam, around 16mW, causes a large slope in the standing wave data. The slope is also there if I turn the Lower power beam off, and use the high power coupling beam for two consecutive EIT pulses. If I scan over the weaker beam, I don't see this slope in the data.
--[[User:Jmiles2|Jmiles2]] ([[User talk:Jmiles2|talk]]) 18:42, 1 October 2014 (CDT)
I've taken some good data from Sep. 24 to Oct 1. The data on the 24th is with larger coupling beams, approximately 2.2mm by 2.4mm. This was measured with the newport camera. Probe power was 3mW. The plots show a sine wave at lower power, and then some localization at higher powers. On the 26th I took some more scans at higher powers, but this time I had the probe power at 4 mW, this was a mistake, I wanted to mimic some of the results from the other day, but forgot to adjust this power to 3 mW. After taking the longer scans, I decided to reduce the beam size to 2mm so that I could got higher in power for testing 1 EIT pulse. The data on Sep 29th shows that as I increase the coupling power, the features get narrower and then this stops at even higher powers, I am not sure why.
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