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Entry  Wed Jul 30 16:35:56 2008, Eric, Update, PSL, PMC Scan Graphs PMCLongScanPeak.tiffPMCLongScanWide.tiffPMCShortScanPeak.tiffPMCShortScanWide.tiff
    Reply  Thu Jul 31 10:27:17 2008, rana, Update, PSL, PMC Scan Graphs 
Message ID: 775     Entry time: Thu Jul 31 10:27:17 2008     In reply to: 772
Author: rana 
Type: Update 
Category: PSL 
Subject: PMC Scan Graphs 

Quote:
Graphs of the PMC scan data that I got earlier today.

On the UNIX computers, one can use 'convert' to change these to PNG. A DC offset should be added to the transmitted
light so that the scan can be plotted with a log y-scale. And, of course, Acrobat can be used to make it into a
single PDF file.

The PMC scan always has this distortion and so the input power has to be decreased to a few mW to reduce the
thermal expansion effect; the expansion coefficient for SiO2 is ~5 x 10^-7 / K and we're worried about nm level
expansions.
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