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Message ID: 1478     Entry time: Tue Aug 19 08:55:24 2014
Author: Evan 
Type: DailyProgress 
Category: Laser 
Subject: South NPRO PZT acutation coefficient 

I used a function generator to drive the south NPRO PZT with a triangle wave. Then with the 14.75 MHz sidebands on, I used a PDA100A to watch the south cavity transmission.

Looking by eye at the carrier and sideband transmission peaks, I find an actuation coefficient of 4.4(2) MHz/V, which is higher than what Tara measured in 2010 (maybe the coefficient depends on which axial mode the NPRO is operating on?)

From the attached plot, we can also see that the mode splitting for the south cavity is 2.0(4) MHz.

Attachment 1: south_npro.pdf  169 kB  | Hide | Hide all
Attachment 2: southnpro.zip  218 kB
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