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David Notebook: Difference between revisions
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I turned down the current to the TA, reducing it's power by a factor of 3. This reduced the measured locking signal by a factor of 5, which is not linear but at least the measured power correlates with the 780.
We're very convinced the signal is 633. After briefly playing with the 780 alignment, Josh and I increased the measured signal to .5 nW. There are likely many more gains that can be made. Suddenly we lost the signal in the afternoon for no clear reason. Eventually after realigning the HeNe and photodiode I was able to find it again, but it was back to the lower level of around 60 pW. Apparently the setup is very sensitive to a variety of factors, but this it to be expected if the signal is indeed from 633 generation.
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