Temperature insensitive refractometer using Bragg gratings in core and under-cladding of open-top ridge waveguide

X. Dai; S. J. Mihailov; C. L. Callender; C. Blanchetière; R. B. Walker

doi:10.1117/12.684486

20 October 2006 Temperature insensitive refractometer using Bragg gratings in core and under-cladding of open-top ridge waveguide

X. Dai, S. J. Mihailov, C. L. Callender, C. Blanchetière, R. B. Walker

Author Affiliations +

Proceedings Volume 6371, Photonic Sensing Technologies; 637107 (2006) https://doi.org/10.1117/12.684486
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

Bragg grating refractometers have been previously disclosed by other authors but sometimes suffer from temperature instability due to well know grating characteristics. In order to overcome this limitation, a temperature insensitive refractometer is developed by using a cladding mode resonance as a temperature reference, with the relative shift of the core mode resonance used to measure the refractive index of substances under test. Specifically, the device fabricated here produces a relative resonance shift of 1 pm for every 5×10^-4 of measured index change, with a temperature sensitivity less than 0.5 pm/°C.

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X. Dai, S. J. Mihailov, C. L. Callender, C. Blanchetière, and R. B. Walker "Temperature insensitive refractometer using Bragg gratings in core and under-cladding of open-top ridge waveguide", Proc. SPIE 6371, Photonic Sensing Technologies, 637107 (20 October 2006); https://doi.org/10.1117/12.684486

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