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- W2051252853 abstract "We consider a degenerate optical parametric oscillator driven by a stationary field of frequency 2ensuremath{Omega} and by a modulated field of frequency ensuremath{Omega} with a small modulation (signal) of frequency ensuremath{omega}'ensuremath{ll}ensuremath{Omega}. By using the eigenvectors of an appropriate matrix we identify the conditions to obtain maximum amplification when a single quadrature component is modulated; the amplification coefficient is calculated analytically as a function of the frequency ensuremath{omega}' and of the parameters. Using a method of quantum Langevin equations, we express in analytic form the noise spectrum for a generic quadrature component of the field of frequency ensuremath{Omega}. By combining the results concerning amplification and noise we compare the signal-to-noise ratio in the output with that in the input, and determine the range of parameters in which the performance of the system is better than that of the phase-insensitive linear amplifier. In particular we identify the cases in which noiseless amplification is possible. The approach developed in this paper can be applied to a generic cavity-based phase-sensitive amplifier." @default.
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- W2051252853 date "1994-08-01" @default.
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- W2051252853 title "Spectral analysis of the degenerate optical parametric oscillator as a noiseless amplifier" @default.
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- W2051252853 doi "https://doi.org/10.1103/physreva.50.1627" @default.
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