High sensitivity sensors utilising characteristics of dispersion-turning-point of long-period gratings in B/Ge co-doped fibre

@article{Shu2002HighSS,
  title={High sensitivity sensors utilising characteristics of dispersion-turning-point of long-period gratings in B/Ge co-doped fibre},
  author={Xuewen Shu and Lin Zhang and Ian Bennion},
  journal={2002 15th Optical Fiber Sensors Conference Technical Digest. OFS 2002(Cat. No.02EX533)},
  year={2002},
  pages={573-576 vol.1}
}
Systematically investigated the waveguide dispersion characteristics of LPFGs. It has been revealed that the coupled cladding modes resonating in the dispersion-turning-point region are intrinsically sensitive to the external perturbation. Thus, LPFG-based application devices requiring good stability should avoid this region. On the other hand, this mode ultra-sensitive-zone can be explored to realise sensors and tuneable filters of high efficiency. 
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