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Entry  Wed Nov 11 15:04:52 2009, Alberto, Update, ABSL, Working on the AP table 
    Reply  Wed Nov 11 16:18:57 2009, Alberto, Update, ABSL, Working on the AP table 
       Reply  Wed Nov 11 17:10:51 2009, Jenne, Update, ABSL, Working on the AP table 
       Reply  Wed Nov 11 17:33:54 2009, Koji, Update, ABSL, Working on the AP table 
          Reply  Thu Nov 12 11:34:38 2009, Alberto, Update, ABSL, Working on the AP table 
             Reply  Thu Nov 12 16:53:59 2009, Alberto, Update, ABSL, Working on the AP table 
Message ID: 2240     Entry time: Wed Nov 11 17:10:51 2009     In reply to: 2239
Author: Jenne 
Type: Update 
Category: ABSL 
Subject: Working on the AP table 

Quote:

Quote:

I've opened the AP table and I'm working on it.

I re-aligned the Faraday on the AP table. I also aligned the beam to the periscope on the PSL and all the other optics along the beam path.  Now I have a nice NPRO beam at the PLL which overlaps with the PSL beam. The alignment has to be further improved becasue I see no beat yet.

I wonder if the all the tinkering on the PSL laser done recently to revive the power have changed the PSL NPRO temperature and so its frequency. That could also explain why the beat doesn't show up at the same temperature of the NPRO as I used to operate it. Although I scanned the NPRO temperature +/- 2 deg and didn't see the beat. So maybe the misalignment is the casue.

Not feeling very well right now. I need to go home for a while.

AP table closed at the moment.

NPRO shutter closed

 We definitely changed the PSL NPRO temp while fiddling around, trying to increase the laser power.  I think it's noted in the elog both times that it's happened in the last few months (once when Rana, Koji and I worked on it, and then again when it was just Koji), but we opened up the side of the MOPA box so that we could get at (and change) the potentiometer which adjusts the NPRO temp.  So you may have to search around for a while.

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