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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 2 — Jan. 24, 2005
  • pp: 453–459

Air-hole collapse and mode transitions in microstructured fiber photonic wires

E. C. Mägi, H. C. Nguyen, and B. J. Eggleton  »View Author Affiliations

Optics Express, Vol. 13, Issue 2, pp. 453-459 (2005)

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We demonstrate robust, low bend loss photonic wires made from air-clad microstructured “grapefruit” fiber. By tapering the fiber and collapsing the air-holes, the guided mode evolves from being fully embedded within the fiber to a spatially-localized evanescent regime a few millimeters in length, where the mode is strongly influenced by the external environment. We show that in the embedded regime there is negligible loss when the taper is immersed in index-matching fluid, while in the evanescent regime the attenuation increases by over 35 dB. Furthermore, we show that an 11 µm wire in the embedded regime can be bent to a radius as small as 95 µm with bend-loss of 0.03 dB in a 500 nm band. The combination of spatial localization, strong dependence on the external environment and small bend radius make the device ideally suited for bio-photonic sensing.

© 2005 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2310) Fiber optics and optical communications : Fiber optics

ToC Category:
Research Papers

Original Manuscript: December 10, 2004
Revised Manuscript: January 9, 2005
Published: January 24, 2005

E. Mägi, H. Nguyen, and B. Eggleton, "Air-hole collapse and mode transitions in microstructured fiber photonic wires," Opt. Express 13, 453-459 (2005)

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