Micro-structured chirped fiber Bragg gratings: toward new spatial encoded fiber optic sensors

M. Pisco; A. Iadicicco; S. Campopiano; A. Cutolo; A. Cusano

doi:10.1117/12.738547

2 July 2007 Micro-structured chirped fiber Bragg gratings: toward new spatial encoded fiber optic sensors

M. Pisco, A. Iadicicco, S. Campopiano, A. Cutolo, A. Cusano

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66192T (2007) https://doi.org/10.1117/12.738547
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

In this work, we report on the investigation of in-fiber photonic devices based on microstructured chirped fiber Bragg gratings (CFBGs) for sensing applications. The basic device here analyzed consists in a CFBG with single or multiple defects obtained by a deep and localized stripping of the cladding layer along the grating structure. The effect of each local thinning along the grating length, properly exploited, basically enables the formation of one pass-band channel within the pristine grating bandwidth and correspondently in one stop-band out of the pristine grating bandwidth. In addition, due to spatial encoding in chirped gratings, each channel spectral position exclusively depends on the features of its own defect (length, depth of the defect and surrounding refractive index) in a well defined location along the grating. Thus, the spectral properties of each channel are not affected by defects located elsewhere along the grating structure, enabling the possibility to develop independent multipoint sensors by exploiting a single grating device.

Citation Download Citation

M. Pisco, A. Iadicicco, S. Campopiano, A. Cutolo, and A. Cusano "Micro-structured chirped fiber Bragg gratings: toward new spatial encoded fiber optic sensors", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66192T (2 July 2007); https://doi.org/10.1117/12.738547

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