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Entry  Tue Jun 29 14:27:10 2010, Jenna, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity frequency_and_mechanical_noise.png
    Reply  Tue Jun 29 15:41:01 2010, Alastair, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity 
       Reply  Tue Jun 29 17:48:31 2010, Zach, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity 
       Reply  Wed Jun 30 00:35:28 2010, rana, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity 
Message ID: 841     Entry time: Tue Jun 29 15:41:01 2010     In reply to: 840     Reply to this: 842   843
Author: Alastair 
Type: Laser 
Category: GYRO 
Subject: Comparison of frequency noise and mechanical noise for the gyro cavity 

It looks like the laser frequency noise will be slightly too high to measure the vibration of the mirrors in the cavity using the control signal for the locking, especially if our cavity is quieter than the MZ at the 40m (which we are hoping it will be).  It would still be nice to get a measurement of the mechanical noise of the mirrors somehow.

 

Quote:

 Here is a plot of laser frequency noise from a Lightwave NPRO 126 laser converted into m*Hz-1/2 for comparison with mechanical noise taken from the MZ at the 40m.

 

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