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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 2553–2561

Generation of frequency degenerate twin photons in pulse pumped fiber optical parametric amplifiers: Influence of background noise

Lei Yang, Fengwei Sun, Ningbo Zhao, and Xiaoying Li  »View Author Affiliations

Optics Express, Vol. 22, Issue 3, pp. 2553-2561 (2014)

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Using a Sagnac fiber loop functions as a deterministic splitter of photon pairs produced by the frequency degenerate four wave mixing, we show that the background noise of the degenerate photon pairs is contributed by both Raman scattering and frequency non-degenerate four wave mixing. To improve the purity of photon pairs in the high gain regime, in addition to suppressing the noise photons by cooling the nonlinear fiber and by optimizing the detuning between the frequencies of the pump and photon pairs, the walk-off effect of the two pulsed pump fields should be mitigated by managing the dispersion of the fiber. Our investigation is not only the first step towards the generation of multi-mode squeezed vacuum in fiber optical parametric amplifiers pumped with pulsed lights, but also contributes to improving the purity of the fiber sources of degenerate photon pairs.

© 2014 Optical Society of America

OCIS Codes
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.0270) Quantum optics : Quantum optics

ToC Category:
Fiber Optics

Original Manuscript: December 4, 2013
Revised Manuscript: January 15, 2014
Manuscript Accepted: January 16, 2014
Published: January 29, 2014

Lei Yang, Fengwei Sun, Ningbo Zhao, and Xiaoying Li, "Generation of frequency degenerate twin photons in pulse pumped fiber optical parametric amplifiers: Influence of background noise," Opt. Express 22, 2553-2561 (2014)

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