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Message ID: 276     Entry time: Sat Jan 26 22:00:03 2008
Author: John 
Type: Update 
Category: General 
Subject: LSC-TRY_OUT and ETMY-QPD 
In the path from the ETM to the trans PD and QPD at the Y end I have replaced a BS1-1064-10-2037-45P with a polariser. The power falling on these diodes has been reduced. When the arm is locked in its nominal state the transmitted power is now less than 1.

This polariser should serve as an injection point for the auxiliary arm locking. I am attempting to use crossed polarisations to separate this loop from the main arm light.
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