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Design of terahertz-bandwidth arbitrary-order temporal differentiators based on long-period fiber gratings

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Abstract

We show that long-period fiber grating (LPG) incorporating N1 π-phase shifts can serve as an Nth order temporal differentiator that operates in transmission. Due to the inherent large bandwidth provided by LPGs, subpicosecond (terahertz-bandwidth) optical signals may be processed with centimeters-length devices. Design parameters for up to fifth-order differentiators are given.

© 2007 Optical Society of America

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