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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3382–3385

PT-symmetric coupler with a coupling defect: soliton interaction with exceptional point

Yuli V. Bludov, Chao Hang, Guoxiang Huang, and Vladimir V. Konotop  »View Author Affiliations

Optics Letters, Vol. 39, Issue 12, pp. 3382-3385 (2014)

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We study the interaction of a soliton in a parity-time (PT) symmetric coupler which has local perturbation of the coupling constant. This defect does not change the PT-symmetry of the system, but locally can achieve the exceptional point. We found that the symmetric solitons after interaction with the defect either transform into breathers or blow up. The dynamics of antisymmetric solitons are more complex, showing domains of successive broadening of the beam and of the beam splitting in two outward propagating solitons, in addition to the single breather generation and blowup. All the effects are preserved when the coupling strength in the center of the defect deviates from the exceptional point. If the coupling is strong enough, the only observable outcome of the soliton-defect interaction is the generation of the breather.

© 2014 Optical Society of America

OCIS Codes
(190.5940) Nonlinear optics : Self-action effects
(190.6135) Nonlinear optics : Spatial solitons

ToC Category:
Nonlinear Optics

Original Manuscript: March 5, 2014
Revised Manuscript: April 14, 2014
Manuscript Accepted: April 15, 2014
Published: June 3, 2014

Yuli V. Bludov, Chao Hang, Guoxiang Huang, and Vladimir V. Konotop, "PT-symmetric coupler with a coupling defect: soliton interaction with exceptional point," Opt. Lett. 39, 3382-3385 (2014)

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