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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 4 — Feb. 15, 2014
  • pp: 953–956

Photon pair generation and pump filtering in nonlinear adiabatic waveguiding structures

Che Wen Wu, Alexander S. Solntsev, Dragomir N. Neshev, and Andrey A. Sukhorukov  »View Author Affiliations

Optics Letters, Vol. 39, Issue 4, pp. 953-956 (2014)

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We propose a novel integrated scheme for generation of Bell states, which allows simultaneous spatial filtering of pump photons. It is achieved through spontaneous parametric down-conversion in the system of nonlinear adiabatically coupled waveguides. We perform detailed analytic study of photon-pair generation in coupled waveguides and reveal the optimal conditions for the generation of each particular Bell state. Furthermore, we simulate the performance of the device under realistic assumptions and show that adiabatic coupling allows us to spatially filter the pump from modal-entangled photon pairs. Finally, we demonstrate that adiabatic couplers open the possibility of maintaining the purity of generated Bell states in a relatively fabrication-fault-tolerant way.

© 2014 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(270.0270) Quantum optics : Quantum optics
(130.7405) Integrated optics : Wavelength conversion devices

ToC Category:
Integrated Optics

Original Manuscript: October 10, 2013
Revised Manuscript: January 9, 2014
Manuscript Accepted: January 10, 2014
Published: February 11, 2014

Che Wen Wu, Alexander S. Solntsev, Dragomir N. Neshev, and Andrey A. Sukhorukov, "Photon pair generation and pump filtering in nonlinear adiabatic waveguiding structures," Opt. Lett. 39, 953-956 (2014)

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