A Novel Optical Add/Drop Multiplexer Utilizing Free Spectral Range Periodicity of Arrayed Waveguide Grating Multiplexer

Masahide MIYACHI
Shigeru OHSHIMA

Publication
IEICE TRANSACTIONS on Electronics   Vol.E84-C    No.5    pp.579-584
Publication Date: 2001/05/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Optical Systems and Technologies
Keyword: 
wavelength-division multiplexing,  optical add/drop multiplexer,  arrayed-waveguide grating,  coherent crosstalk,  

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Summary: 
We propose a novel optical add/drop multiplexer (OADM) utilizing free spectral range (FSR) periodicity of an arrayed-waveguide multiplexer (AWG). In this OADM, wavelength-division multiplex (WDM) signal is multiplexed and/or de-multiplexed in two steps. Power penalty due to coherent crosstalk is drastically reduced compared with that of conventional OADM where AWG multiplexers are opposite to each other. The calculated power penalty due to the coherent crosstalk is about 0.7 dB after the 16 OADMs in the case of 128 wavelengths. It was confirmed through a computer simulation that more than one hundred channels at 10 Gbps data rate could be accommodated in an OADM network with 16 nodes. These results show that the OADM network with over 1 Tbps capacity and 16 nodes could be constructed.