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A 4-wavelength optical multi/demultiplexer for WDM subscriber loop systems using analog baseband video transmission

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3 Author(s)
Sano, K. ; NTT Electrical Communications Laboratories, Yokosuka-shi, Kanagawa, Japan ; Watanabe, R. ; Minowa, Junichiro

This paper describes the design principles and performance of optical multi/demultiplexers (MUX/DEMUX's) in wavelength-division multiplexing (WDM) subscriber-loop systems over a 50- μm core diameter, graded-index (GI), multimode fiber, which employ analog baseband video transmission using laser diodes (LD's). In this WDM arrangement, requirements for MUX/DEMUX's are: 1) low insertion loss; 2) no signal degradation caused by optical interchannel crosstalk; 3) only a small amount of analog baseband signal degradation caused by the use of MUX/DEMUX; 4) a small size and simple structure capable of multiplexing three or four wavelengths; and 5) good stability. The newly developed 4-wavelength MUX/DEMUX satisfies the preceding requirements and is suitable for application to WDM subscriber-loop systems using analog baseband signals along with digital signals.

Published in:

Lightwave Technology, Journal of  (Volume:4 ,  Issue: 6 )