Abstract
Squeezed light can in principle reduce the variance of phase measured by an Interferometer. A simple interferometer design is described based on multimode squeezed states at frequencies ω ± Δ and ω ± 3Δ at one input to the interferometer. The other interferometer input is a pair of high-amplitude coherent states at frequencies ω ± Δ. A balanced homodyne detector is used to measure the phase difference in the arms of the interferometer by monitoring the photocurrent at frequency 2Δ. A wideband analysis1 shows that the measured phase variance for this multimode interferometer can be reduced well below the standard quantum limit. Results to date of an experiment in progress to verify this analysis are also reported. It is hoped that this design can demonstrate that for equal coherent state input power levels the multimode squeezed light interferometer can surpass the phase measurement sensitivity of a conventional interferometer by a factor equal to the degree of squeezing.
© 1987 Optical Society of America
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