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Characterisation and performance of a Terfenol-D coated femtosecond laser inscribed optical fibre Bragg sensor with a laser ablated microslot for the detection of static magnetic fields

This paper demonstrates the use of laser machining of optical fibre and subsequent recoating with Terfenol-D to produce novel magnetic field sensors. It was one of the early papers describing novel sensor devices formed by the femtosecond micromachining of optical fibres and is important because it demonstrates the flexibility of the femtosecond machining technology to access the evanescent field. It remains one of the more sensitive novel fibre devices reported for this application. Further work in this area has been carried out with an international partner in Cyprus (kyriacos.kalli@cut.ac.cy).