The following summarises the characteristics of the output Faraday isolator.  The
power meter used was an out of calibration date, Ophir 1Z02411 power meter, S/N 73375
with filter 19603 S/N 132872.  Microwatt level measurements were done with the filter
removed.

    An incident laser power of 10 mW was used to avoid the possible saturation of the
photodiodes used.


  

    
 Item 
    
 photodiode 
    
 power meter 
  
  

    
 transmission 
    
 98.1% +/- 0.6% 
    
 94.8% +/- 0.1% 
  
  

    
 back-scatter isolation 
    
 657 ppm 
    
 610 ppm +/- 5 ppm 
  
  

    
 TFP AR reflection 
    
 N/A 
    
 N/A 
  
  

    
 isolation 
    
 61.1 dB - 58.9 dB 
    
 69.7 dB - 70 dB 34.9 dB - 35.0 
  
  

    
 backscattering 
    
 24.4 ppm +/- 0.5 ppm 
    
 N/A 
  
  

    
 squeezer path transmission 
    
 99.8% - 98.4% 
    
 93.3% - 93.5% 
  


Some notes about the measurements. The backscattering could not be measured with the power meter.
The beam reflected from the AR surface of the thin film polariser could not be separated from the
prompt reflection in the clean space available, and was only visible with a CCD-based IR viewer.


  

    
 motion 
    
 frequency 
    
 Q 
  
  

    
 vertical 
    
 1.49 Hz - 1.50 Hz 
    
 22 -/+ 1 
  
  

    
 longitudinal 
    
 0.62 Hz 
    
 22 
  
  

    
 pitch 
    
 1.05 Hz 
    
 17 
  
  

    
 yaw 
    
 1.05 Hz 
    
 20 
  
  

    
 side to side 
    
 0.63 Hz 
    
 15 
  



  Gerardo / Peter