Compact bending sensor based on a fiber Bragg grating in an abrupt biconical taper.

@article{Cui2015CompactBS,
  title={Compact bending sensor based on a fiber Bragg grating in an abrupt biconical taper.},
  author={Wei Cui and Jinhai Si and Tao Chen and Xun Hou},
  journal={Optics express},
  year={2015},
  volume={23 9},
  pages={11031-6}
}
We propose and experimentally demonstrate a compact bending sensor. The head of the sensor is only 0.8 mm in length, and consists of an abrupt biconical fiber taper formed using a conventional fusion splicer, in which a fiber Bragg grating (FBG) is inscribed using a femtosecond laser. The biconical taper incorporating the FBG can couple light from the cladding to the backward-propagating core mode, which realizes an interferometer in reflection-mode. Bending of the structure can be detected… CONTINUE READING