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Entry  Tue Mar 22 00:03:29 2011, Bryan, Configuration, Green Locking, PSL vs Y arm laser temperature pairing PSL_vs_Y_arm_Temperatures.png
    Reply  Tue Mar 22 00:23:20 2011, Jenne, Configuration, Green Locking, PSL vs Y arm laser temperature pairing 
       Reply  Tue Mar 22 19:03:45 2011, Bryan, Configuration, Green Locking, PSL vs Y arm laser temperature pairing 
          Reply  Thu Mar 24 15:30:59 2011, Bryan, Configuration, Green Locking, PSL vs Y arm laser temperature pairing Temp_Beating_Day02_html_m2d719182.jpg
             Reply  Thu Mar 24 16:33:32 2011, Bryan, Configuration, Green Locking, PSL vs Y arm laser temperature pairing PSL_vs_X-end_T_data_fine.jpg
Message ID: 4440     Entry time: Thu Mar 24 16:33:32 2011     In reply to: 4439
Author: Bryan 
Type: Configuration 
Category: Green Locking 
Subject: PSL vs Y arm laser temperature pairing 

X_arm and Y_arm vs PSL comparison.

 

 

Just a quick check of the performance of the X arm and Y arm lasers in comparison to the PSL. Plotting the data from the X arm vs PSL and Y arm vs PSL on the same plot shows that the X arm vs the PSL has no observable trending of mode-hopping in the laser, while the Y arm vs the PSL does. Suspect this is due to the fact that the X arm and PSL are both Innolight lasers with essentially identical geometry and crystals and they'll tend to mode-hop at roughly the same temperatures - note that the Xarm data is rough grained resolution so it's likely that any mode-hop transitions have been skipped over. The Lightwave on the other hand is a very different beast and has a different response, so won't hop modes at the same temperatures.

Given how close the PSL is to one of the mode-transition regions where it's currently operating (32.26 degC) it might be worth considering shifting the operating temperature down one degree or so to around 31 degC? Just to give a bit more headroom. Certainly worth bearing in mind if problems are noticed in the future.

PSL_vs_X-end_T_data_fine.jpg

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