Optical parametric oscillator: Difference between revisions

Revision as of 19:31, 14 December 2006

Revision as of 19:40, 14 December 2006

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Above threshold, the pump beam depletion makes it sensitive to the quantum phenomena happening inside the crystal. The first measurement of squeezing in the pump field after parametric interaction was done in 1997<ref>K. Kasai, J.G. Gao, and C. Fabre, Europhys. Lett. 40,

25 (1997).</ref>. Actually, it washas been recently predicted that all three fields (pump, signal and idler) must be entangled<ref>A. S. Villar, M. Martinelli, C Fabre, and P. Nussenzveig, Phys. Rev. Lett. 97, 140504 (2006).</ref>.

Not only intensity and phase of the twin beams share quantum correlations, but also do their spatial modes<ref>M. Martinelli, N. Treps, S. Ducci, S. Gigan, A. Maître, and C. Fabre, Phys. Rev. A 67, 023808 (2003).</ref>. This feature could be used to enhance signal to noise ratio in image systems.