Intrinsic, multiplexable sensors for electric field strength using structural slow light in phase-shifted fibre Bragg gratings

Orr, Philip and Niewczas, Pawel; Liao, Yanbiao and Ho, Hoilut and Jin, Wei and Sampson, David D. and Yamauchi, Ryozo and Chung, Youngjoo and Nakamura, Kentaro and Rao, Yunjiang, eds. (2012) Intrinsic, multiplexable sensors for electric field strength using structural slow light in phase-shifted fibre Bragg gratings. In: SPIE Proceedings Vol. 8421. SPIE--The International Society for Optical Engineering., CHN. ISBN 9780819491039 (https://doi.org/10.1117/12.939472)

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Abstract

In this paper we demonstrate through simulation the potential for phase-shifted fibre Bragg gratings incorporating structural slow light to enable intrinsic reflection-mode point sensors for electric field or voltage. It is shown that lo-bi FBGs incorporating multiple phase shifts yield large enhancements in group index (group delay) at resonance, thus amplifying and localizing time-dependent non-reciprocal effects. A relative, multiplexable measurement of electric field by comparison of the phase unbalance between linear modes on and off resonance is proposed, yielding static resolutions of 24 V and 18 mV respectively in unpoled (dc Kerr effect) and poled (Pockels effect) fibres.

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