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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 19 — Oct. 1, 2012
  • pp: 4152–4154

Giant sensitivity of long period gratings in transition mode near the dispersion turning point: an integrated design approach

Pierluigi Pilla, Cosimo Trono, Francesco Baldini, Francesco Chiavaioli, Michele Giordano, and Andrea Cusano  »View Author Affiliations


Optics Letters, Vol. 37, Issue 19, pp. 4152-4154 (2012)
http://dx.doi.org/10.1364/OL.37.004152


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Abstract

We report an original design approach based on the modal dispersion curves for the development of long period gratings in transition mode near the dispersion turning point exhibiting ultrahigh refractive index sensitivity. The theoretical model predicting a giant sensitivity of 9900 nm per refractive index unit in a watery environment was experimentally validated with a result of approximately 9100 nm per refractive index unit around an ambient index of 1.3469. This result places thin film coated LPGs as an alternative to other fiber-based technologies for high-performance chemical and biological sensing applications.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(240.0310) Optics at surfaces : Thin films
(350.2770) Other areas of optics : Gratings
(280.1415) Remote sensing and sensors : Biological sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 25, 2012
Revised Manuscript: August 23, 2012
Manuscript Accepted: August 27, 2012
Published: September 28, 2012

Citation
Pierluigi Pilla, Cosimo Trono, Francesco Baldini, Francesco Chiavaioli, Michele Giordano, and Andrea Cusano, "Giant sensitivity of long period gratings in transition mode near the dispersion turning point: an integrated design approach," Opt. Lett. 37, 4152-4154 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-19-4152


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