Abstract

The use of large-mode-area tapered holey fibers with collapsed air holes for refractive index sensing is demonstrated. The collapsing of the holes is achieved by tapering the fibers with a �??slow-and-hot�?? method. This non adiabatic process makes the core mode to couple to multiple modes of the solid taper waist. Owing to the beating between the modes the transmission spectra of the tapered holey fibers exhibit several interference peaks. They shift remarkable to longer wavelengths as the external index increases. The multiple peaks, combined with a fitting algorithm, may allow high-accuracy refractometric measurements which can be used for diverse applications.

© 2005 Optical Society of America

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Appl. Opt. (2)

Appl. Phys. Lett. (1)

W. Liang, Y. Huang, Y. Xu, R. K. Lee, and A. Yariv, �??Highly sensitive fiber Bragg grating refractive index sensors,�?? Appl. Phys. Lett. 86, 151122 (2005).
[CrossRef]

Electron. Lett. (1)

J. Villatoro, D. Monzón-Hernández, and D. Talavera, �??High resolution refractive index sensing with cladded multimode tapered optical fibre,�?? Electron. Lett. 40, 106-107 (2004).
[CrossRef]

IEEE Photonics Technol. Lett. (2)

J. F. Ding, A. P. Zhang, L. Y. Shao, J. H. Yan, and S. He, �??Fiber-taper seeded long-period grating pair as a highly sensitive refractive-index sensor,�?? IEEE Photonics Technol. Lett. 17, 1247-1249 (2005).
[CrossRef]

A. Iadiccico, S. Campopiano, A. Cutolo, M. Giordono, and A. Cusano, �??Nonuniform thinned fiber Bragg gratings for simultaneous refractive index and temperature measurements,�?? IEEE Photonics Technol. Lett. 17, 1495-1497 (2005).
[CrossRef]

J. Appl. Phys. (1)

E. C. Magi, P. Steinvurzel, and B. J. Eggleton �??Transverse characterization of tapered photonic crystal fibers,�?? J. Appl. Phys. 96, 3976-3982 (2004).
[CrossRef]

J. Opt. Soc. Am. B (1)

Laser Phys. (1)

V. P. Minkovich, A. V. Kir�??yanov, and S. Calixto, �??Large-hole-large-spacing holey fibers with a few air holes: fabrication and measurements of light-delivering properties and optical losses,�?? Laser Phys. 14, 767-771 (2004).

Meas. Sci. Technol. (2)

K. Schroeder, W. Ecke, R. Mueller, R. Willsch and A. Andreev, �??A fibre Bragg grating refractometer,�?? Meas. Sci. Technol. 12, 757-764 (2001).
[CrossRef]

T. M. Monro, W. Belardi, K. Furusawa, J. C. Bagget, N. G. R. Broderick, and D. J. Richardson, �??Sensing with microstructured optical fibers,�?? Meas. Sci. Technol. 12, 854-858 (2001).
[CrossRef]

Opt. Express (3)

Opt. Lett. (5)

Proc. SPIE (1)

V. P. Minkovich, A. V. Kir�??yanov, and S. Calixto, �??Modeling, fabrication and characterization of large-mode-area photonic crystal fibers with low bending loss,�?? in 8th Int. Symposium on Laser Metrology, R. Rodrigues-Vera and F. Mendoza-Santoyo, eds., Proc. SPIE Vol. 5776, -408 (2005).

Rev. Sci. Instrum. (1)

T. Allsop, R. Reeves. D. J. Webb, I. Beninion, and R. Neal, �??A high sensitivity refractometer based upon a long period grating Mach�??Zehnder interferometer,�?? Rev. Sci. Instrum. 73, 1702-1705 (2002).
[CrossRef]

Science (1)

P. St. J. Russell, �??Photonic crystal fibers,�?? Science 299, 358-362 (2003).
[CrossRef]

Other (2)

A. Bjarklev, J. Broeng, and A.S. Bjarklev, Photonic Crystal Fibres (Kluver Academic Publishers, Boston, (2003).

V. P. Minkovich, J. Villatoro, D. Monzón-Hernández, A. B. Sotsky, and L. I. Sotskaya are preparing a manuscript to be called �??Modeling of holey fiber tapers with resonance transmission for sensor applications.�??

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