Threshold and linewidth of a mirrorless parametric oscillator

Details Threshold and linewidth of a mirrorless parametric oscillator Threshold and linewidth of a mirrorless parametric oscillator

1999-07-09

arxiv.org/abs/quant-ph/9907032v2

Physics

Quantum Physics

revised version to appear in Phys.Rev.Lett., contains discussion on threshold conditions and operation on few-photon level

Scientific paper

10.1103/PhysRevLett.84.3558

We analyze the above-threshold behavior of a mirrorless parametric oscillator based on resonantly enhanced four wave mixing in a coherently driven dense atomic vapor. It is shown that, in the ideal limit, an arbitrary small flux of pump photons is sufficient to reach the oscillator threshold. We demonstrate that due to the large group-velocity delays associated with coherent media, an extremely narrow oscillator linewidth is possible, making a narrow-band source of non-classical radiation feasible.

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