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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 6 — Mar. 15, 2010
  • pp: 6149–6155

Experimental generation of 6 dB continuous variable entanglement from a nondegenerate optical parametric amplifier

Yu Wang, Heng Shen, Xiaoli Jin, Xiaolong Su, Changde Xie, and Kunchi Peng  »View Author Affiliations

Optics Express, Vol. 18, Issue 6, pp. 6149-6155 (2010)

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We experimentally demonstrated that the quantum correlations of amplitude and phase quadratures between signal and idler beams produced from a non-degenerate optical parametric amplifier (NOPA) can be significantly improved by using a mode cleaner in the pump field and reducing the phase fluctuations in phase locking systems. Based on the two technical improvements the quantum entanglement measured with a two-mode homodyne detector is enhanced from ~ 4 dB to ~ 6 dB below the quantum noise limit using the same NOPA and nonlinear crystal.

© 2010 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.6570) Quantum optics : Squeezed states

ToC Category:
Quantum Optics

Original Manuscript: January 11, 2010
Revised Manuscript: February 9, 2010
Manuscript Accepted: March 10, 2010
Published: March 11, 2010

Yu Wang, Heng Shen, Xiaoli Jin, Xiaolong Su, Changde Xie, and Kunchi Peng, "Experimental generation of 6 dB continuous variable entanglement from a nondegenerate optical parametric amplifier," Opt. Express 18, 6149-6155 (2010)

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