论文信息 - High sensitivity of dual resonant peaks of long-period fibre grating to surrounding refractive index changes

High sensitivity of dual resonant peaks of long-period fibre grating to surrounding refractive index changes

The spectral response of the dual resonant peaks of a 100 /spl mu/m period fibre grating to surrounding refractive index (SRI) from n=1 to 1.74 has been investigated. The two peaks were found to shift in opposite directions over -180 and +300 nm, respectively, as the SRI changed. A novel chemical sensing scheme with enhanced sensitivity based on the measurement of the separation of the two peaks instead of a shift in a single peak is also presented.

Shan Jiang | Dexiu Huang | Wei Shi | Xuewen Shu | Xuemei Zhu

[1] Shan Jiang,et al. Dual resonant peaks of LP/sub 015/ cladding mode in long-period gratings , 1999 .

[2] S. B. Lee,et al. Displacements of the resonant peaks of a long-period fiber grating induced by a change of ambient refractive index. , 1997, Optics letters.

[3] John E. Sipe,et al. Long-period fiber gratings as band-rejection filters , 1995 .

[4] Alan D. Kersey,et al. Analysis of the response of long period fiber gratings to external index of refraction , 1998 .

[5] A. Vengsarkar,et al. Optical fiber long-period grating sensors. , 1996, Optics letters.