Demonstration of channel-spacing-tunable demultiplexing of optical orthogonal-frequency-division-multiplexed subcarriers utilizing reconfigurable all-optical discrete Fourier transform

Mohammad Reza Chitgarha; Salman Khaleghi; Omer F Yilmaz; Moshe Tur; Michael W Haney; Carsten Langrock; Martin M Fejer; Alan E Willner

doi:10.1364/OL.37.003975

Demonstration of channel-spacing-tunable demultiplexing of optical orthogonal-frequency-division-multiplexed subcarriers utilizing reconfigurable all-optical discrete Fourier transform

Opt Lett. 2012 Oct 1;37(19):3975-7. doi: 10.1364/OL.37.003975.

Authors

Mohammad Reza Chitgarha¹, Salman Khaleghi, Omer F Yilmaz, Moshe Tur, Michael W Haney, Carsten Langrock, Martin M Fejer, Alan E Willner

Affiliation

¹ Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA. chitgarh@usc.edu

PMID: 23027250
DOI: 10.1364/OL.37.003975

Abstract

We experimentally demonstrate a tunable and reconfigurable optical discrete Fourier transform (DFT) to demultiplex orthogonal-frequency-division-multiplexed subcarriers with 2/3/4 subcarriers at 20/40 GHz frequency spacing. An average power penalty of ~5 dB (~3.5) at bit error ratio of 10(-9) is achieved for 4×20 Gbit/s (4×10 Gbit/s) OFDM signal with 20 GHz frequency spacing.