Title :
Arbitrary-Order Ultrabroadband All-Optical Differentiators Based on Fiber Bragg Gratings
Author :
Rivas, Luis M. ; Singh, Kanwarpal ; Carballar, Alejandro ; Azaña, José
Abstract :
We introduce a general approach for designing ultrabroadband arbitrary-order all-optical (all-fiber) time differentiators based on the use of fiber Bragg gratings (FBGs). Specifically, we numerically demonstrate that an Nth-order time differentiator can be implemented using a single specially apodized highly dispersive linearly chirped FBG operated in transmission. A concatenated reflection phase-shifted FBG is also required for implementing any odd-order differentiator. Our numerical simulations show that accurate and efficient time differentiation of optical signals with bandwidths up to a few hundreds of gigahertz can be realized using readily feasible FBG structures.
Keywords :
Bragg gratings; optical design techniques; optical fibres; FBG; arbitrary-order all-optical time differentiators; concatenated reflection phase-shifting; fiber Bragg gratings; odd-order differentiator; optical signals; ultrabroadband all-optical differentiators; Bandwidth; Bragg gratings; Fiber gratings; Frequency; Optical filters; Optical pulse shaping; Optical reflection; Optical refraction; Optical signal processing; Optical variables control; Differentiation; gratings; optical fiber devices; optical signal processing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.901746