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Entry  Thu Oct 25 22:52:07 2012, janosch, Update, General, tip-tilt phase maps 6x
    Reply  Thu Oct 25 23:00:44 2012, Manasa, Update, General, tip-tilt phase maps 
       Reply  Thu Oct 25 23:14:42 2012, janosch, Update, General, tip-tilt phase maps 
          Reply  Mon Oct 29 11:27:42 2012, Manasa, Update, General, tip-tilt phase maps 6x
             Reply  Mon Oct 29 14:57:41 2012, janosch, Update, General, tip-tilt phase maps 
Message ID: 7639     Entry time: Mon Oct 29 14:57:41 2012     In reply to: 7638
Author: janosch 
Type: Update 
Category: General 
Subject: tip-tilt phase maps 

Quote:

 [Jan, Manasa]

Below are phasemaps for the tip-tilts with both tilt and RoC removed. We have not used Koji's code; but tweaked the earlier code to remove curvature. 

 The posted residual phase maps show circular contours since the data came with relatively low resolution in height. This is ok for what we want to do with these phase maps (i.e. simulating higher-order mode content in the PRC using Finesse). Better resolution is only required if you want to understand in detail optical scattering out of the cavity. Anyhow, the circular artifacts can be removed by first interpolating the phase maps to a higher lateral resolution, and then performing tilt and curvature subtraction. So we will soon have better looking phase maps posted. Then we should think about what type of Finesse simulation we could run. Certainly one simulation is to look at the beam shape in the PRC, but more interesting could be how sensitive the shape is to mirror alignments. The current simulation shows a mode that resembles the TEM01, but I have not yet tried to find optimal alignment of the mirrors (in simulation) to search for the TEM00 mode.

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