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Message ID: 347     Entry time: Thu Sep 9 02:20:32 2010
Author: tara 
Type: Notes 
Subject: problem about PBS/QWP  

We have used an instant PBS/QWP which is a PBS optically contacted to an aligned QWP in front of a reference cavity

(for PDH locking and optical isolation.) It cannot properly block the reflected beam, so certain amount of power got reflected back to

the PMC and back to the laser. This causes higher value of RIN. ()

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