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Message ID: 1244     Entry time: Thu Jan 22 11:54:09 2009
Author: Alberto 
Type: Configuration 
Category: PSL 
Subject: Mach Zehnder Output Beam QPD 
I rotated by 180 degrees the 10% beam splitter that it is used to fold the beam coming from the Mach Zehnder (directed to the MC) on to the QPD.

The alignment of the beam with that QPD has so been lost. I'll adjust it later on.

The rotation of the BS had the (surprising) effect of amplifying the Absolute Length experiment's beat by 9 times. Maybe because of a polarizing effect of the Beam Splitter which could have increased the beating efficiency between the PSL and the NPRO beams?
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