Title :
Design of AWG-based arbitrarily shaped multiplexers
Author :
Cincotti, Gabriella
Author_Institution :
Eng. Dept., Univ. Roma Tre, Rome, Italy
Abstract :
An arrayed waveguide grating (AWG) has a very well-known configuration, composed of two slab couplers and a grating array; during the past decades, the device has been extensively investigated as frequency (de)multiplexer ((D)MUX), and many different approaches have been proposed to obtain a flat-top response. In the present paper, we separately analyse the functionalities of the input/output slab couplers, showing that a proper parameter selection can shape the filter transmittance. In addition, the device can be used in all-optical orthogonal frequency division multiplexing (OFDM), dense OFDM (D-OFDM) and interleaved OFDM (IL-OFDM) systems. A single slab coupler with 4 input/output ports can be designed as a 90° hybrid, using different tapering widths to compensate the loss non-uniformity due to the diffraction effect.
Keywords :
OFDM modulation; arrayed waveguide gratings; optical communication equipment; optical couplers; optical modulation; AWG-based arbitrarily shaped multiplexers; all-optical orthogonal frequency division multiplexing; arrayed waveguide grating; dense OFDM; diffraction effect; filter transmittance; input/output slab couplers; interleaved OFDM; loss nonuniformity; single slab coupler; tapering widths; Arrayed waveguide gratings; Couplers; Gratings; OFDM; Optical filters; Slabs; 90° hybrid; arrayed waveguide gratings; frequency multiplexer; orthogonal frequency division multiplexing;
Conference_Titel :
Transparent Optical Networks (ICTON), 2014 16th International Conference on
Conference_Location :
Graz
DOI :
10.1109/ICTON.2014.6876497
