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Updated: Jun 22, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Demultiplexer for optical orthogonal frequency-division multiplexing using an optical fast-Fourier-transform circuit
K Takiguchi1, M Oguma, T Shibata
1NTT Photonics Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa, 243-0198 Japan. taki@aecl.ntt.co.jp
Abstract:
An integrated-optic device for demultiplexing optical orthogonal frequency-division-multiplexed signals is described that consists of an optical fast-Fourier-transform circuit and optical gates. The fast-Fourier-transform circuit is composed of symmetrical Mach-Zehnder interferometers that are suitable for precisely adjusting filter characteristics. This device can process four or more channels with a relatively simple configuration and reduced size. An optical demultiplexer for four subcarrier channels is realized and used to demultiplex 4 x 10 Gbit/s signals.
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