Open AccessWhat else can an AWG do?
Author(s) -
Gabriella Cincotti
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.00b288
Subject(s) - multiplexing , optics , arrayed waveguide grating , wavelength division multiplexing , computer science , phase modulation , orthogonal frequency division multiplexing , optical filter , fourier transform , electronic engineering , physics , phase noise , telecommunications , wavelength , engineering , channel (broadcasting) , quantum mechanics
The present paper aims to describe other functionalities for an arrayed waveguide grating (AWG)-based device, showing that this widely used configuration can be designed not only to frequency multiplex/demultiplex wavelength division multiplexing (WDM) signals, but also to perform the discrete Fourier transform (DFT) and the discrete fractional Fourier transform (DFrFT) of a signal, in all-optical orthogonal frequency division multiplexing (OFDM) systems. In addition 1 × N and N × N phased array switches architectures are described, as well as a new configuration to perform polarization diversity demultiplexing. Finally, a general approach, based on an analogy with the finite impulse response (FIR) filter approach, is presented to design optical modulators for any modulation format, using either phase modulators (PM) or electro-absorption modulators (EAM).