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Entry  Sun Dec 7 13:11:57 2014, manasa, Summary, General, Frequency Offset Locking - To Do List FOLtodolist.pdf
    Reply  Mon Dec 8 15:54:39 2014, manasa, Summary, General, Dec 8 - Check Frequency Counter module 
       Reply  Mon Dec 8 20:53:51 2014, diego, Summary, General, Dec 8 - Check Frequency Counter module 
          Reply  Tue Dec 9 16:06:46 2014, diego, Summary, General, Dec 8 - Check Frequency Counter module 
    Reply  Tue Dec 9 00:30:27 2014, manasa, Summary, General, Dec 9 - Elaborate to do list FOL_FiberChassis.pdf
       Reply  Tue Dec 9 16:07:16 2014, manasa, Summary, General, Dec 9 - FC module and fiber chassis FCmodule.png
    Reply  Wed Dec 10 16:12:29 2014, manasa, Summary, General, Dec 10 - PSL table FiberMod_front.jpgFOL_fiber.jpg
       Reply  Thu Dec 11 12:50:12 2014, manasa, Summary, General, PSL table optical layout 
          Reply  Thu Dec 11 23:34:06 2014, manasa, Summary, General, PSL table optical layout 
             Reply  Fri Dec 12 02:30:25 2014, Jenne, Summary, General, PSL table optical layout 
    Reply  Fri Dec 12 14:38:39 2014, manasa, Summary, General, Frequency Offset Locking - To Do List (Revised) FOLtodolist.pdf
       Reply  Fri Dec 12 15:19:04 2014, manasa, Summary, General, Dec 12 - PSL table PSLtoFiber.pngPSLfiberChassis.pngPSLfiberChassis.png
       Reply  Wed Dec 17 11:57:56 2014, manasa, Summary, General, Y arm optical layout 58.png
Message ID: 10787     Entry time: Thu Dec 11 23:34:06 2014     In reply to: 10780     Reply to this: 10788
Author: manasa 
Type: Summary 
Category: General 
Subject: PSL table optical layout 

Quote:

 I assembled the telescope to couple PSL light into the fiber. The maximum coupling that I could obtain was 10mW out of 65mW (~15%).

I was expecting to achieve 80-90% coupling from my design estimates. It makes me wonder if the beam waist measurements made by Harry during summer were correct in the first place. I would like to go back and check the beam waist at the PSL table.

Also, we need a pair of 8m (~25 feet) long SMA cables to carry the RF signal from the beat PD on the PSL table to frequency counter module on the IOO rack.

Steve says that we had a spool of SMA cable and it was borrowed by someone a few months ago. Any updates on either who is holding it or if it has been used up already would help.


The X end slow computer was down this morning. So I used only the Y arm ALS to record the noise level for reference. DTT data for ALSY out of loop noise before opening PSL enclosure is saved in /users/manasa/data/141211/ALSYoutLoop.xml

 I missed to elog this earlier. I have temporarily removed the DC photodiode for GTRY to install the fiber holder on the PSL table. So GTRY will not be seeing anything right now.

 

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