Citation:
C. S. Cheung, S. M. Topliss, S. W. James, and R. P. Tatam, Response of fibre
optic long period gratings operating near the phase matching turning point to
the deposition of nanostructured coatings, Journal of the Optical Society of
America. B Optical Physics, 2008, Vol. 25, Issue 6, pp. 897-902
Abstract:
The response of the dual resonant bands of a fibre optic long period grating
operating near the phase matching turning point to the deposition of a
nanostructured coating is investigated. The dual resonant bands are observed to
show a high sensitivity to the thickness of the coating, but with opposite
signs. Appropriate design of the device, based on the grating period, the
refractive index and thickness of the coating and the fibre composition, can
allow the sensitivity of the device to the optical thickness to be optimized. A
sensitivity of 1.45 nm / nm is observed experimentally.
