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Message ID: 1063     Entry time: Fri Sep 17 17:25:32 2010
Author: Frank 
Type: Laser 
Category: Pulser 
Subject: remaining power in PC "OFF"-state 

i tried to find the optimum combination of L/2 and L/4 together with optimizing the alignment trough the high power PC which we wanna use for the pulsing of the laser.
The polarizer i use is a glan-laser polarizer from Karl Lambrecht with an extinction ration of about 10^5. Without the PC the remaining power in reflection is ~360uW out of 26W (~1:72000).

Screenshot 1 shows the remaining beam:

remains_360uW.bmp

With the PC in the path and optimized alignment the remaining power is ~130mW, shape of the remaining beam shown in screenshot 2:

remains_130mW.bmp

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