Sensitivity of photonic crystal fiber grating sensors: biosensing, refractive index, strain, and temperature sensing

Lars Henning Rindorf, Ole Bang

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We study the sensitivity of fiber grating sensors in the applications of strain, temperature, internal label-free biosensing, and internal refractive index sensing. New analytical expressions for the sensitivities, valid for photonic crystal fibers are rigorously derived. These are generally valid, and we identify a previously unaccounted term for temperature and strain sensing. It is shown that dispersion plays a central role in determining the sensitivity, and that dispersion may enhance or suppress sensitivity as well as change the sign of the resonant wavelength shifts. We propose a quality factor, Q, for characterizing long period gratings sensors.
Original languageEnglish
JournalJournal of the Optical Society of America - B - Optical Physics
Volume25
Issue number3
Pages (from-to)310-324
ISSN0740-3224
DOIs
Publication statusPublished - 2008

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