Non-critically squeezed light via spontaneous rotational symmetry breaking

Details Non-critically squeezed light via spontaneous rotational symmetry breaking Non-critically squeezed light via spontaneous rotational symmetry breaking

2007-09-03

arxiv.org/abs/0709.0212v4

Physics

Quantum Physics

4 pages, 1 figure, replaced with resubmitted version

Scientific paper

10.1103/PhysRevLett.100.203601

We theoretically address squeezed light generation through the spontaneous breaking of the rotational invariance occuring in a type I degenerate optical parametric oscillator (DOPO) pumped above threshold. We show that a DOPO with spherical mirrors, in which the signal and idler fields correspond to first order Laguerre-Gauss modes, produces a perfectly squeezed vacuum with the shape of a Hermite-Gauss mode, within the linearized theory. This occurs at any pumping level above threshold, hence the phenomenon is non-critical. Imperfections of the rotational symmetry, due e.g. to cavity anisotropy, are shown to have a small impact, hence the result is not singular.

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