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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 21 — Nov. 1, 2005
  • pp: 2849–2851

Design principles of multifiber resonant directional couplers with hollow Bragg fibers:  example of a 3×3 coupler

M. Skorobogatiy  »View Author Affiliations


Optics Letters, Vol. 30, Issue 21, pp. 2849-2851 (2005)
http://dx.doi.org/10.1364/OL.30.002849


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Abstract

When several hollow photonic crystal fibers (HPCFs) are placed in proximity to each other, radiation-induced interfiber coupling between their core guided modes is observed. Under certain conditions coupling between the core modes of two touching collinear fibers can have a resonant increase via excitation of a low-quality intermirror cavity resonant state. Such coupling, however, decreases dramatically within the first micrometer of intermirror separation. Moreover, when fibers are touching, in the frequency domain a large number of accidental degeneracies with fiber surface and mirror states complicate the design of a stable 2×2 coupler. To alleviate these problems we consider coupling among three hollow Bragg fibers. When placed in the vertices of an isosceles triangle, even for a finite separation between fibers, triangular interfiber cavity forms a high-quality resonator that can be tuned via additional structural elements to a particular frequency of interest. Interfiber surface states are suppressed by keeping the fiber separation finite, thus allowing stable coupling conditions in a 3×3 HPCF coupler configuration.

© 2005 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2340) Fiber optics and optical communications : Fiber optics components
(230.5750) Optical devices : Resonators

ToC Category:
Fiber Optics and Optical Communications

Citation
M. Skorobogatiy, "Design principles of multifiber resonant directional couplers with hollow Bragg fibers:  example of a 3×3 coupler," Opt. Lett. 30, 2849-2851 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-21-2849

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