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A wide-range temperature immune ultra-sensitive refractive index sensor using concatenated LPGs

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Abstract

Compensating the temperature induced phase-changes of concatenated dual-resonance long-period-gratings by a suitably chosen inter-grating material and space we report wide-range temperature insensitivity along with extremely high refractive-index sensitivity, on either side of turn-around wavelength.

© 2013 Optical Society of America

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