40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Fri Jul 9 12:25:25 2010, kiwamu, Update, Green Locking, SHG on PSL table PSL_doubling.png
    Reply  Tue Jul 13 11:00:29 2010, kiwamu, Update, Green Locking, SHG on PSL table : optimum temeprature power_temp.png
       Reply  Tue Jul 13 11:20:07 2010, Dmass, Update, Green Locking, SHG on PSL table : optimum temeprature 
Message ID: 3204     Entry time: Tue Jul 13 11:20:07 2010     In reply to: 3203
Author: Dmass 
Type: Update 
Category: Green Locking 
Subject: SHG on PSL table : optimum temeprature 

 

 It seems like you might inherit an offset by using step (3) b/c of the temperature gradient between the crystal and the sensing point. Depending on how large this gradient is you could increase the linear coupling from temperature to intensity noise from zero to a significant number. Phase noise should not be effected.

SInce these things (ovens) are so low time constant, shouldn't we

  1. Lock to a temperature
  2. Let the oven equilibrate for however long - a few tau maybe - my oven has a time constant of 60 sec, don't know if this is fast or slow compared to that
  3. Measure P_532/P_1064
  4. Change the setpoint
  5. Go back to step 1
ELOG V3.1.3-