enhanced mechanical strength of the fiber compared to the
more usual window stripping method of writing FBGs [5], [6].
FBGs have been described in great detail elsewhere [4] but,
in brief, can be thought of as optical strain gauges that can
be interrogated by observing the shift in wavelength reflected
back from the element. Each FBG can be tuned to reflect a
different wavelength of light; hence the entire array can be
interrogated simultaneously by observing the optical spectrum
covering the reflected peaks from every FBG in the array