Highly sensitive cladding-etched arc-induced long-period fiber gratings for refractive index sensing
作者： A. Martinez-Rios , D. Monzon-Hernandez , I. Torres-Gomez
DOI: 10.1016/J.OPTCOM.2009.10.108
关键词:
摘要: Abstract We have investigated the effects of cladding etching in arc-induced long-period fiber gratings. Comparing position resonant wavelengths at each diameter with corresponding theoretical dispersion curves effective refractive index, it is found that some resonances show a better match anti-symmetrical modes, while others symmetrical modes. Etching to ∼39 μm, results coupling high-order mode very sensitive changes ambient index. The peak shifts remarkably (∼230 nm) toward shorter as external index increases. This sensitivity higher than any previously reported
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