[Mitsuhashi,Shalika]

This elog is about doing ring down measurement, and fit the data

What we did:
When we try to measure the ring down. The pictuere from osiloscope was attached.

The supposed decay time from the picture was around 1μs, and the result of fitting the data show that decay time is 0.9μs.
This value is comparable to time resolution of the photo detector we use now.

What we will do:
We check how the photo detector and AOM works when we shut down a lazer. 
And we will try to reinstall a photo detector that has hight time resolution.