Abstract
We present results of novel broadband long-period gratings (LPGs) that
were fabricated axially symmetric in single-mode fiber with a carbon-dioxide
laser. The discrete layer-peeling (DLP) technique and a genetic algorithm
(GA) were used to design the LPGs. Numerical simulations were used to indicate
the performance and absolute error of reconstructing a complex spectral profile
for a particular synthesis technique. We found that the DLP technique has
the highest performance and executes in the least amount of time. However,
a GA could not efficiently synthesize an LPG, but produced a refractive index
change profile that can be implemented using a common LPG fabrication system.
It is shown that the experimental results obtained with the GA are superior
to that obtained with the DLP technique.
© 2011 IEEE
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