Abstract
A general and practical approach for designing ultra-fast all-optical
(all-fiber) signal processing devices based on chirped fiber Bragg gratings
(C-FBGs) working in transmission is presented. The approach can be used to
design any minimum-phase linear optical device, e.g., first and high-order
all-optical time differentiators and integrators and a large variety of optical
pulse shapers, significantly overcoming the bandwidth limitations of previous
FBG-based designs. Processing speeds in the THz range, corresponding to sub-picosecond
time features, can be achieved using readily feasible grating apodization
profiles. The approach is successfully proved through the design of two relevant
functionalities, namely a THz-bandwidth optical differentiator and a 1-ps
flat-top optical pulse shaper.
© 2013 IEEE
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