Hi all, I've had a question from a customer about an experiment we do with the   
   MZ   
   interferometer.  We put a Rubidium cell in one arm and measure the phase shift   
   with   
   absorption.  A write up here.   
   https://www.dropbox.com/s/lbqokhvbhup85ah/4-2%20DLS%20ResFaraday   
   ot%20Caltech09.pdf?dl=0   
   Done by guys at Caltech.   
   Anyway you can take the output from either side of the output beam-splitter.   
   The question:  Is there anything to be learned from looking at both   
   complimentary outputs?   
   My response was not really, if you had a weak signal you could get a   
   bit more by subtracting the two outputs.  But that's all I know of.   
      
   I told the customer I'd ask if there are any other uses.   
   Are there?   
      
   Thanks,   
   George H.   
      
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