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Optics Communications

Amplitude squeezing and sub-poissonian photon statistics in a two-photon correlated-spontaneous-emission laser

Luigi A. Lugiato, Ning Lü, Marlan O. Scully

Published Jan 1, 1990• 9 citations
Publisher
DOI
10.1016/0030-4018(90)90393-8

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It is shown that the Λ quantum beat system, into which a new atomic coherence is introduced, can produce bright two-mode sub-Poissonian light. The Mandel Q parameter is calculated using Scully-Lamb theory. On one hand, when quantum noises of the relative amplitude and relative phase drop to vaccum noise levels, the average mode exhibits sub-Poissonian photon distribution; when quantum noises of the average amplitude and average phase drop to vaccum noise levels, the relative mode exhibits sub-Poissonian photon statistics; the optimum Mandel Q parameter is -0.5. On the other hand, in the above two cases, each of the correlated spontaneous emission laser modes exhibits sub-Poissonian photon statistics with optimum Mandel Q parameter of -0.25.

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The authors study the dynamical properties of a periodically pumped laser which displays sub-Poissonian photon statistics. Using a stroboscopic quantum map, they establish the linewidth for the ideal case where pump fluctuation and spontaneous emission are ineffective. Corrections due to spontaneous emission are also discussed.

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By intermittently and periodically pumping N atoms and observing time-scale separation for pumping, emission, and photon leakage from the cavity a laser with up to 50%, sub-Poissonian photon statistics can be realized. We present a stroboscopic period-to-period description of such a laser and clarify how pumping and spontaneous emission can be eliminated and cavity damping be minimized as sources of photon noise.

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Spectrum of squeezing for two-photon correlated-spontaneousemission lasers

Ning Lü

Optics Communications•Feb 1, 1992•0 citations
It is shown that the Λ quantum beat system, into which a new atomic coherence is introduced, can produce bright two-mode sub-Poissonian light. The Mandel Q parameter is calculated using Scully-Lamb theory. On one hand, when quantum noises of the relative amplitude and relative phase drop to vaccum noise levels, the average mode exhibits sub-Poissonian photon distribution; when quantum noises of the average amplitude and average phase drop to vaccum noise levels, the relative mode exhibits sub-Poissonian photon statistics; the optimum Mandel Q parameter is -0.5. On the other hand, in the above two cases, each of the correlated spontaneous emission laser modes exhibits sub-Poissonian photon statistics with optimum Mandel Q parameter of -0.25.