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A time and wavelength division fiber loop distribution system with acousto‐optic tunable filters
Author(s) -
Shimazu Yoshihiro,
Kikuchi Shiro
Publication year - 1990
Publication title -
international journal of digital and analog communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1047-9627
DOI - 10.1002/dac.4510030109
Subject(s) - wavelength division multiplexing , wavelength , optics , channel spacing , division (mathematics) , crosstalk , optical fiber , gaussian , optical filter , materials science , physics , mathematics , arithmetic , quantum mechanics
A time and wavelength division fiber loop distribution system with acousto‐optic tunable filters is proposed. This system can provide a large number of 150 Mb/s HDTV channels with a reliable technology. A theoretical analysis by Gaussian beam approximation shows that one system can distribute 320 HDTV channels to 256 subscribers with a minimum wavelength spacing of 2 nm. An experimental 12 channel (4 time division × 3 wavelength division) system with a wavelength spacing of 20 nm in the 1.3 μm region demonstrates a data rate of 1.2 Gb/s with only −4dB loss and −20 dB crosstalk at the tunable filter. The experimental loss and crosstalk characteristics agree well with the theoretical analysis.