First Measure Power Stabilization

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First Measure Power Stabilization

Post  mdipaolo on Mon Mar 23, 2009 6:12 pm

I have tried to measure the noise using the pre-amplifier. I have measured the noise of the PD (with Laser Driver into the Lab and out the Lab) and the noise of the Laser.
Some values are: P(order 0) around 5 W, P(order 1) around 463 mW.
In the following some graphs:

Pd Order 0 (First)









PD Order 0 (Second)









The best thing is to use another pre-amplifier because with this seems that the signal is not clean:

PD Order 0 First Signal With Laser:



PD Order 0 Second Signal With Laser:




I think that the Driver can be put in the Lab.

mdipaolo

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Mechanical part for AOM

Post  mdipaolo on Mon Mar 23, 2009 7:26 pm

Now we have only one post for AOM.
I think that it is very important build at least one mechanical part for another AOM that it will be used in Pisa.
The following figure is a simple outline of mechanical part:



I don't know if we have another rotation stage for AOM...But i think that this is not important when we will mount the AOM in Cascina (it is important now with the measure...). The important thing, instead, is to have the mechanicals parts where mount the AOM.

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Some comments

Post  Alessio on Mon Mar 23, 2009 8:46 pm

I have some comments on the measurements performed today:
1) it would be better to put different measurements all on the same graph, so that if there are differences these are clearly visible
2) graphs with Kaleidagraph should be made in the following way:
a) line style with no points
b) log-log scales
3) it would be better to compare RINs instead of absolute noise measurements
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