Accurate index profile measurements for fiber bragg gratings and sensor application

X. Chapeleau, D. Leduc, P. Casari, Y. Quiquempois, J. Lebon, F. Lopez, C. Lupi, C. Boisrobert
2004 Technical Digest: Symposium on Optical Fiber Measurements, 2004.  
This paper demonstrates that the combination of the optical low-coherence reflectometry and the layer-peeling algorithm is a suitable method to measure the index profile of fiber Bragg gratings. The high sensitivity of this technique permits to detect index modulation amplitude as small as ¦ § ¦ © . The phase of the grating can also be determined accurately and we demonstrate that this measurement permits to retrieve the axial strain distribution for gratings subjected to strain gradient.
doi:10.1109/sofm.2004.183503 fatcat:kkoenqrafngvzfrkkhaemp437e