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Entry  Tue Jun 25 09:58:08 2013, Erica, Notes, fiber optic, mode matching refcav_mm.JPG
    Reply  Mon Jul 8 21:52:04 2013, tara, DailyProgress, optic, mode matching to refcavs 
       Reply  Tue Jul 9 19:35:20 2013, tara, DailyProgress, optic, beat board is back 
          Reply  Thu Jul 11 00:19:52 2013, tara, DailyProgress, optic, both cavities are locked photo_2013_07_10.JPG
Message ID: 1233     Entry time: Thu Jul 11 00:19:52 2013     In reply to: 1231
Author: tara 
Type: DailyProgress 
Category: optic 
Subject: both cavities are locked 

Both cavities are locked (not optimized yet). Since it has been awhile that both are locked, here is a picture.

photo_2013_07_10.JPG

 Rcav is locked by Fast feedback only. I still have to check the polarity for PC feedback.  I adjusted the phase between the LO and PD for RCAV loop to get a nice error signal. I noticed that there is an offset in the error signal, I will try to adjust the polarization of the beam in front of the EOM to see if I can reduce this offset from RFAM.

To do:

  • lock rcav with both fast and PC feedbacks
  • optimize the setup ( reducing RFAM, minimize back reflection)
  • setup the beat path (mode match + alignment)
  • setup the ISS path
  • check the beat frequency
  • re organizing the wiring on the table.
  • replace the current SMA cables with the semi-rigid ones, once all the equipments are in place.

 

 

 

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