C. Byard, T. Graham, A. Jordan, and P. Kwiat, "Using Recycling to Increase the Signal-to-Noise Ratio in Weak Measurements,"
in Research in Optical Sciences ,
OSA Technical Digest (online)
(Optical Society of America, 2014), paper QTh4A.3.
Recycling unmeasured photons in a system to determine small mirror tilts can substantially improve the signal-to-noise ratio. We achieve an improvement by a factor of 1.36 over a system with no recycling.