16 May 2008 Polarisation mode coupling of excessively tilted fibre Bragg gratings with directional transverse loading
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Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 700443 (2008) https://doi.org/10.1117/12.786048
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia
Abstract
We report a distinctive polarisation mode coupling behaviour of tilted fibre Bragg gratings (TFBGs) with tilted angle exceeding 45°. The ex-45° TFBGs exhibit pronounced polarisation mode splitting resulted from grating structure asymmetry induced birefringence. We have studied and analysed the property of ex-45° TFBGs under transverse load applied to their equivalent fast- and slow-axis. The results show that the coupling between the orthogonally polarised modes takes place only when the load is applied to its fast-axis, giving a prominent directional loading response. This transverse load related polarisation property may be exploitable for implementation of optical fibre vector sensors capable of measuring the magnitude and orientation of the applied transverse load.
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Rui Suo, Xianfeng Chen, Kaiming Zhou, Lin Zhang, Ian Bennion, "Polarisation mode coupling of excessively tilted fibre Bragg gratings with directional transverse loading", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700443 (16 May 2008); doi: 10.1117/12.786048; https://doi.org/10.1117/12.786048
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