Temperature and thermo-optic coefficient measurements using optical fibre long period gratings operating at phase matching turning point

S. Korposh; R. Wong; S. James; R. Tatam

doi:10.1117/12.2026599

20 May 2013 Temperature and thermo-optic coefficient measurements using optical fibre long period gratings operating at phase matching turning point

S. Korposh, R. Wong, S. James, R. Tatam

Author Affiliations +

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87942N (2013) https://doi.org/10.1117/12.2026599
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

The response of optical fibre long period gratings (LPGs), fabricated with precise control of the grating period to operate at or near the phase matching turning point (PMTP), to temperature was studied. The effect of the grating period on sensor performance was studied. The sensitivity of the LPG operating at the phase matching turning point to temperature was 0.99 nm/°C for 111.5 μm grating period that is ca. 7 times higher than that of an LPG operating far from turning point. The possibility of using LPG sensors to determine the thermo-optic coefficient of the surrounding material was explored.

Citation Download Citation

S. Korposh, R. Wong, S. James, and R. Tatam "Temperature and thermo-optic coefficient measurements using optical fibre long period gratings operating at phase matching turning point", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87942N (20 May 2013); https://doi.org/10.1117/12.2026599

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