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 Thu Jul 3 18:48:09 2008, Alberto, Update, General, Beats of the two lasers in the absolute length measurement observed
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 Thu Jul 3 22:54:45 2008, Koji, Update, General, Beats of the two lasers in the absolute length measurement observed
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Mon Jul 7 11:22:02 2008, Alberto, Update, General, Beats of the two lasers in the absolute length measurement observed
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Mon Jul 7 13:06:38 2008, Koji, Update, General, Beats of the two lasers in the absolute length measurement observed
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Message ID: 638
Entry time: Mon Jul 7 13:06:38 2008
In reply to: 637
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| Author: |
Koji |
| Type: |
Update |
| Category: |
General |
| Subject: |
Beats of the two lasers in the absolute length measurement observed |
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One may need an RF filter after the mixer. I expect the SR560 does work for this purpose.
If it does not, a passive LPF can be used.
| Quote: | I didn't post a screenshot from the RF SA because I had troubles with the interface with the computer (unfortunately the network SA cannot export the data).
There's is problem with the PLL circuit. The signal, beside the beat, also contains peaks at 33, 66 and 99 MHz, so we should think about filtering those out, correct?
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