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Soviet Journal of Quantum Electronics

Generation of squeezed states by a fluctuating pump wave

А. Н. Ораевский

Published Aug 31, 1987• 0 citations
Publisher

Abstract

It is shown that fluctuations of the pumping rate in generation of squeezed states of an electromagnetic field by parametric decay and four-wave scattering are responsible for the finite squeezing limit.
DOI
10.1070/qe1987v017n08abeh009617

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A squeezed state of the electromagnetic field has less noise in one of its two amplitude components than that of a coherent state. This property makes squeezed states potentially useful in low noise and precision measurement. Squeezed states may be generated by, among other things, degenerate parametric amplifiers and four-wave mixers. The reduced noise in one of the amplitude components is most easily observed via a homodyne detector. A number of experimental efforts to generate and detect squeezed states are under way. Here, in describing experimental techniques, the experiments' carried out by Slusher et al. are emphasized. A number of techniques were employed to successfully generate squeezed light. An atomic beam of sodium provided the optical nonlinearity in a cavity-backward four-wave mixer. By employing pairs of Fabry-Perot modes spaced symmetrically about the pump frequency, squeezed light was generated in nondegenerate conditions where Rayleigh scattering of pump light could be avoided. To observe squeezing, a number of nonidealities such as phase jitter and detector inefficiencies also had to be overcome.
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