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Entry  Wed Aug 13 17:37:43 2014, Jenne, Update, General, Game plan 2014_Aug_13.pdf
    Reply  Thu Aug 14 02:51:46 2014, Jenne, Update, General, Game plan Y_ALS_FINE_PHASE_OUT_noisy_13Aug2014.pdf
    Reply  Thu Aug 14 14:58:03 2014, Jenne, Update, General, Updated game plan 2014_Aug_14.pdf
       Reply  Thu Aug 14 15:42:29 2014, Koji, Update, General, Updated game plan 
          Reply  Thu Aug 14 15:51:37 2014, Jenne, Update, General, Updated game plan 
             Reply  Thu Aug 14 18:02:11 2014, Koji, Update, General, Updated game plan 
                Reply  Thu Aug 14 18:05:05 2014, Jenne, Update, General, Updated game plan 
    Reply  Fri Aug 15 20:26:37 2014, ericq, Update, General, Game plan 
Message ID: 10404     Entry time: Fri Aug 15 20:26:37 2014     In reply to: 10377
Author: ericq 
Type: Update 
Category: General 
Subject: Game plan 

Quote:

Q already did the tweak up of the PSL SHG crystal alignment.  HE SHOULD ELOG ABOUT THIS.  What was the final power of green that you got?  Do we have any record of a previous measurement to compare to?

As Jenne mentioned, I did this. 

Specifically, I first tweaked the mirror pointing the IR into the SGH in pitch and yaw to maximize the green power, and then adjusted the little set screws on the side of the SHG to maximize further. Power after the harmonic separator was of order 150uW. On the Y Green BBPD, I got ~48uW, instead of the 40uW Rana, Jenne, and myself saw the other night. 

HOWEVER,

now that I look through old ELOGs, I find some posts by Kiwamu saying the power should be around 650uWand that he was able to get 640uW out. So: I should do this again, systematically, more carefully, etc., etc. (Linked ELOG also states that optimum SHG temperature is alignment dependent...)

 

 

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