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 $5\mathrm{mm}$ long, $511\mathrm{nm}$ period gold grating fiber taper with a $10\mathrm{\mu }\mathrm{m}$ 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.

© 2006 Optical Society of America

Modal coupling in surface-corrugated long-period-grating fiber tapers

W. Ding and S. R. Andrews
Opt. Lett. 33(7) 717-719 (2008)

Surface corrugation Bragg gratings on optical fiber tapers created via plasma etch postprocessing

W. Ding, S. R. Andrews, and S. A. Maier
Opt. Lett. 32(17) 2499-2501 (2007)

Leakage coupling of ultrasensitive periodical silica thin-film long-period grating coated on tapered fiber

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Pengfei Wang, Lin Bo, Chunying Guan, Yuliya Semenova, Qiang Wu, Gilberto Brambilla, and Gerald Farrell
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Modal coupling in surface-corrugated long-period-grating fiber tapers: erratum

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Opt. Lett. 33(9) 1007-1007 (2008)