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Message ID: 5623     Entry time: Wed Oct 5 18:31:02 2011
Author: Katrin 
Type: Update 
Category: Green Locking 
Subject: Exchanged mirror on YARM table 

On the Green YARM end table the second mirror behind the laser has been exchanged.

Reason: The light is impinging on the mirror under an angle of  about 10 degrees, but the old mirror was coated for angle of incidence (aoi) of 45°.

Thus it was more like a beam splitter. The new mirror is a 1" Goock & Housego mirror which has a better performance for an aoi of 10 degree.

Realignment through Faraday Isolator and SHG cristall as well as 532nm isolator is almost finished.

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