Abstract
We develop and experimentally validate a method to
characterize linearly chirped fiber Bragg gratings
(CFBGs) under local temperature perturbations for
tunable spectral shaping. The heat distribution along
the FBG is modeled by a Gaussian–Lorentzian
function. The phase and apodization profiles of the CFBG
are characterized by measuring the complex reflection
spectrum and subsequently using inverse scattering.
Finally, coupled mode theory is used to predict the
transmittivity of the CFBG under the local temperature
perturbations. As an application, we use our model to
spectrally shape the spectrum of a gain-switched laser
(GSL) and generate ultra-short, optimally designed
pulses for high speed wireless data distribution in
indoor environments.
© 2011 IEEE
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