Controlled modification and direct characterization of multimode-fiber refractive-index profiles

Brant C. Gibson; Shane T. Huntington; John D. Love; Tom G. Ryan; Laurence W. Cahill; Darrell M. Elton

doi:10.1364/AO.42.000627

Controlled modification and direct characterization of multimode-fiber refractive-index profiles

Brant C. Gibson, Shane T. Huntington, John D. Love, Tom G. Ryan, Laurence W. Cahill, Darrell M. Elton

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A combination of controlled annealing and characterization by scanning probe microscopy (SPM) is used to demonstrate that the refractive-index profile of a commercially available silica-based optical fiber can be accurately reconfigured for use as an evanescent field sensor. The process relies on the controlled relocation of the silica glass dopants across the fiber cross section through heat treatment and the accurate measurement of the resulting dopant redistribution with SPM and differential etching techniques. The effect of variable annealing along a length of fiber is to produce a mode transformer to couple light from a laser source into the sensing region of the fiber.

Original language	English
Pages (from-to)	627-633
Number of pages	7
Journal	Applied Optics
Volume	42
Issue number	4
DOIs	https://doi.org/10.1364/AO.42.000627
Publication status	Published - 1 Feb 2003

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abstract = "A combination of controlled annealing and characterization by scanning probe microscopy (SPM) is used to demonstrate that the refractive-index profile of a commercially available silica-based optical fiber can be accurately reconfigured for use as an evanescent field sensor. The process relies on the controlled relocation of the silica glass dopants across the fiber cross section through heat treatment and the accurate measurement of the resulting dopant redistribution with SPM and differential etching techniques. The effect of variable annealing along a length of fiber is to produce a mode transformer to couple light from a laser source into the sensing region of the fiber.",

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AU - Love, John D.

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AU - Cahill, Laurence W.

AU - Elton, Darrell M.

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AB - A combination of controlled annealing and characterization by scanning probe microscopy (SPM) is used to demonstrate that the refractive-index profile of a commercially available silica-based optical fiber can be accurately reconfigured for use as an evanescent field sensor. The process relies on the controlled relocation of the silica glass dopants across the fiber cross section through heat treatment and the accurate measurement of the resulting dopant redistribution with SPM and differential etching techniques. The effect of variable annealing along a length of fiber is to produce a mode transformer to couple light from a laser source into the sensing region of the fiber.

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Controlled modification and direct characterization of multimode-fiber refractive-index profiles

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