Experimental demonstration of a ferroelectric liquid crystal tunable filter for fast demodulation of FBG sensors

Sunish Mathews; Yuliya Semenova; Ginu Rajan; Gerald Farrell

doi:10.1117/12.820629

18 May 2009 Experimental demonstration of a ferroelectric liquid crystal tunable filter for fast demodulation of FBG sensors

Sunish Mathews, Yuliya Semenova, Ginu Rajan, Gerald Farrell

Author Affiliations +

Proceedings Volume 7356, Optical Sensors 2009; 73561O (2009) https://doi.org/10.1117/12.820629
Event: SPIE Optics + Optoelectronics, 2009, Prague, Czech Republic

Abstract

A discretely tunable Surface-Stabilized Ferroelectric Liquid Crystal based Lyot Filter, with tuning speeds in the order of microseconds, is demonstrated experimentally as a channel dropper for the demodulation of multiple Fibre Bragg Grating sensors. The 3-stage Lyot Filter designed and experimentally verified can be used together with the high-speed ratiometric wavelength measurement system employing a fibre bend loss edge filter. Such systems can be used for the demodulation of distributed Fibre Bragg Grating sensors employed in applications such as structural monitoring, industrial sensing and haptic telerobotic surgical systems.

Citation Download Citation

Sunish Mathews, Yuliya Semenova, Ginu Rajan, and Gerald Farrell "Experimental demonstration of a ferroelectric liquid crystal tunable filter for fast demodulation of FBG sensors", Proc. SPIE 7356, Optical Sensors 2009, 73561O (18 May 2009); https://doi.org/10.1117/12.820629

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