Phys. Rev. A 70, 042315 (2004) [4 pages]Compact source of Einstein-Podolsky-Rosen entanglement and squeezing at very low noise frequenciesReceived 30 March 2004; published 25 October 2004 We report on the experimental demonstration of strong quadrature Einstein-Podolsky-Rosen entanglement and squeezing at very low noise sideband frequencies produced by a single type-II, self-phase-locked, frequency degenerate optical parametric oscillator below threshold. The generated two-mode squeezed vacuum state is preserved for noise frequencies as low as 50 kHz. Designing simple setups able to generate nonclassical states of light in the kHz regime is a key challenge for high sensitivity detection of ultraweak physical effects such as gravitational wave or small beam displacement. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.042315
DOI:
10.1103/PhysRevA.70.042315
PACS:
03.67.Mn, 04.80.Nn, 42.50.Dv, 42.50.Lc
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