Modal coupling in fiber tapers decorated with metallic surface gratings

W. Ding; S. R. Andrews; T. A. Birks; S. A. Maier

doi:10.1364/OL.31.002556

Modal coupling in fiber tapers decorated with metallic surface gratings

W. Ding, S. R. Andrews, T. A. Birks, S. A. Maier

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

30 Citations (Scopus)

Abstract

An interference-based scheme for fabricating periodic metal gratings on one side of the uniform waist of optical fiber tapers has been developed. Optical characterization of a 5 mm long, 511 nm period gold grating fiber taper with a 10 μm diameter reveals backward coupling to both guided and radiation modes that is explained by using an analytical mode-coupling analysis. A refractometer based on this grating taper has a high and constant sensitivity over a large refractive index operating range of 1 to 1.41.

Original language	English
Pages (from-to)	2556-2558
Number of pages	3
Journal	Optics Letters
Volume	31
Issue number	17
DOIs	https://doi.org/10.1364/OL.31.002556
Publication status	Published - 1 Sept 2006
Externally published	Yes

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abstract = "An interference-based scheme for fabricating periodic metal gratings on one side of the uniform waist of optical fiber tapers has been developed. Optical characterization of a 5 mm long, 511 nm period gold grating fiber taper with a 10 μm diameter reveals backward coupling to both guided and radiation modes that is explained by using an analytical mode-coupling analysis. A refractometer based on this grating taper has a high and constant sensitivity over a large refractive index operating range of 1 to 1.41.",

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AB - An interference-based scheme for fabricating periodic metal gratings on one side of the uniform waist of optical fiber tapers has been developed. Optical characterization of a 5 mm long, 511 nm period gold grating fiber taper with a 10 μm diameter reveals backward coupling to both guided and radiation modes that is explained by using an analytical mode-coupling analysis. A refractometer based on this grating taper has a high and constant sensitivity over a large refractive index operating range of 1 to 1.41.

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Modal coupling in fiber tapers decorated with metallic surface gratings

Abstract

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