• Title : Demultiplexing Using an Arrayed-Waveguide Grating for Frequency-Interleaved DWDM Millimeter-Wave Radio-on-fiber Systems
• Author : Hiroyuki Toda, Tsukasa Yamashita, Toshiaki Kuri, and Ken-ichi Kitayama
• Journal : IEEE/OSA J. Lightwave Technol., vol.21, No.8, pp.1735-1741, August 2003.
• Abstract : The frequency-interleaved dense-wavelength-division-multiplexing (DWDM) millimeter-wave (mm-wave) radio-on-fiber is an indispensable technique to improve the optical spectrum efficiency. We propose possible configurations of multiplexing and demultiplexing (DEMUX) schemes using an arrayed-waveguide grating (AWG) with two input and N output waveguides (N: total channel number). In this paper, we focus on the DEMUX scheme and experimentally demonstrate the DEMUX scheme using a commercially available AWG. In the experiment, 25-GHz-separated two-channel optical double sideband signals modulated by a 60-GHz millimeter-wave carrying a 156-Mb/s data are optically multiplexed by the frequency interleaving. The power penalty after DEMUX, which was due to interchannel interference, was less than 0.5 dB. We also made a transmission experiment over 25-km standard single-mode fiber (SMF). No noticeable power penalty in the received data due to chromatic dispersion of the transmission fiber was observed. This is because only the carrier and a sideband are detected in the proposed DEMUX scheme.
• Key words : Arrayed-waveguide grating (AWG), demultiplexing, dense-wavelength-division multiplexing (DWDM), millimter-wave radio communication, optical fiber communication, optical propagation in dispersive media, optical waveguide filters, radio-on-fiber

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