... 200 300 400 500 600 700 800 -15 -10 -505 10 15 0 .1 0.5 1 357 10 13 20 ppm Difference intensity / mVWavelength / nm20 ppm 13 10 753 1 0.50 .1 Fig. 10 . Optical transmission difference ... 8000-2.5-2.0 -1. 5 -1. 0-0.50.00.5 1. 0 1. 52.02.53.0 17 ppm 15 ppm 1 ppm0.5 ppm0 .1 ppm3 ppm5 ppm7 ppm 10 ppm 13 ppm20 ppm Sensor response / %Time / sec706 nm470 nm350 nmairNH30 .1 1 10 -10 -505 10 15 20 ... No. 25, p. 17 19 17 21, ISSN 0 013 - 519 4 Cibu1a, E. & Donlagic, D. (2004). All-fibre Fabry-Perot strain sensor. Proceedings of 2nd European Workshop on OFS, pp. 18 0 18 3, ISBN 9780 819 454348,...