Abstract
We design and demonstrate an all-optical temporal differentiator based on a
simple Moire fiber grating operated in reflection. The simulation results prove that
a single Moire fiber grating with only one π-phase shifted point can act as
the first-order temporal differentiator and that a Moire fiber grating incorporating
two symmetrical π-phase shifted points can act as the second-order temporal
differentiator. A practical Moire fiber grating is fabricated, thereby proving that
such a grating can act as the first-order temporal differentiator. Our results
verify the feasibility, flexibility, and accuracy of the proposed method.
© 2012 Chinese Optics Letters
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