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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 7 — Apr. 1, 2014
  • pp: 2109–2112

Generation of 1.5  μm discrete frequency-entangled two-photon state in polarization-maintaining fibers

Qiang Zhou, Wei Zhang, Chenzhi Yuan, Yidong Huang, and Jiangde Peng  »View Author Affiliations


Optics Letters, Vol. 39, Issue 7, pp. 2109-2112 (2014)
http://dx.doi.org/10.1364/OL.39.002109


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Abstract

In this Letter, the generation of a 1.5 μm discrete frequency-entangled two-photon state is realized based on a piece of commercial polarization-maintaining fiber (PMF). It is connected with a polarization beam splitter to realize a modified Sagnac fiber loop (MSFL). Correlated two-photon states are generated through a spontaneous four-wave-mixing process along the two propagation directions of the MSFL, and output from the MSFL with orthogonal polarizations. Their quantum interference is realized through a 45° polarization collimation between polarization axes of PMFs inside and outside the MSFL, while their phase difference is controlled by the polarization state of the pump light. The frequency-entangled property of the two-photon state is demonstrated by a spatial quantum beating experiment with a fringe visibility of 98.2±1.3%, without subtracting the accidental coincidence counts. The proposed scheme generates a 1.5 μm discrete frequency-entangled two-photon state in a polarization-maintaining way, which is desired in practical quantum light sources.

© 2014 Optical Society of America

OCIS Codes
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(270.0270) Quantum optics : Quantum optics
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: February 17, 2014
Revised Manuscript: March 5, 2014
Manuscript Accepted: March 5, 2014
Published: March 28, 2014

Citation
Qiang Zhou, Wei Zhang, Chenzhi Yuan, Yidong Huang, and Jiangde Peng, "Generation of 1.5  μm discrete frequency-entangled two-photon state in polarization-maintaining fibers," Opt. Lett. 39, 2109-2112 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-7-2109

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