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Optics Letters

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  • Vol. 24, Iss. 7 — Apr. 1, 1999
  • pp: 475–477

Directional coupler with soliton-induced waveguides

Song Lan, Eugenio DelRe, Zhigang Chen, Ming-feng Shih, and Mordechai Segev  »View Author Affiliations


Optics Letters, Vol. 24, Issue 7, pp. 475-477 (1999)
http://dx.doi.org/10.1364/OL.24.000475


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Abstract

We demonstrate a directional coupler that employs two waveguides induced by two mutually incoherent photorefractive solitons propagating in parallel at close proximity. Efficient coupling from one waveguide to the other is achieved for probe beams at wavelengths much longer than that of the solitons. We study the mutual coupling as a function of distance between solitons.

© 1999 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(160.5320) Materials : Photorefractive materials
(230.7370) Optical devices : Waveguides

Citation
Song Lan, Eugenio DelRe, Zhigang Chen, Ming-feng Shih, and Mordechai Segev, "Directional coupler with soliton-induced waveguides," Opt. Lett. 24, 475-477 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-7-475


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References

  1. M. Segev and G. I. Stegeman, Phys. Today 51(8), 42 (1998).
  2. A. W. Snyder, D. J. Mitchell, L. Polodian, and F. Ladouceur, Opt. Lett. 16, 21 (1991).
  3. R. De La Fuente, A. Barthelemy, and C. Froehly, Opt. Lett. 16, 793 (1991); B. Luther-Davies and Y. Xiaoping, Opt. Lett. 17, 496 (1992).
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  8. M. Klotz, H. Meng, G. Salamo, M. Segev, and S. R. Montgomery, Opt. Lett. 24, 77 (1998).
  9. Note the distinction from incoherent solitons, which are partially spatially incoherent M. Mitchell, Z. Chen, M. Shih, and M. Segev, Phys. Rev. Lett. 77, 490 (1996) or spatially and temporally incoherent M. Mitchell and M. Segev, Nature (London) 387, 880 (1997) entities.
  10. M. Shih and M. Segev, Opt. Lett. 21, 1538 (1996); M. Shih, Z. Chen, M. Segev, T. Coskun, and D. N. Christodoulides, Appl. Phys. Lett. 69, 4151 (1996); M. Shih, M. Segev, and G. Salamo, Phys. Rev. Lett.PRLTAO 78, 2551 (1997).
  11. In isotropic self-focusing media, the force between mutually incoherent solitons is only attractive. In photorefractive media, an incoherent collision between screening solitons is primarily attractive (and leads to the results shown in Ref. 10), except in the pathologic case when such two-dimensional solitons collide at a shallow angle and when the plane formed by the collision trajectories is parallel to the c axis (direction of the applied field). In this case one can observe some small anomalous repulsion, as observed by W. Krolikowski, M. Saffman, B. Luther-Davies, and C. Denz, Phys. Rev. Lett. 80, 3240 (1998). We believe that it is possible to utilize this anomalous interaction to bring two solitons (at those special conditions) to a proximity closer than what we have demonstrated.
  12. Z. Chen, M. Segev, T. Coskun, and D. N. Christodoulides, Opt. Lett. 21, 1436 (1996).
  13. A. Yariv, Optical Electronics in Modern Communications, 5th ed. (Oxford, New York, 1996), Chap. 13.8, pp. 521–525.

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