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Proceedings Paper

Digital services using quadrature amplitude modulation (QAM) over CATV analog DWDM system
Author(s): JengRong Yeh; Mark D. Selker; J. Trail; David Piehler; Israel Levi
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Paper Abstract

Dense Wavelength Division Multiplexing (DWDM) has recently gained great popularity as it provides a cost effective way to increase the transmission capacity of the existing fiber cable plant. For a long time, Dense WDM was exclusively used for baseband digital applications, predominantly in terrestrial long haul networks and in some cases in metropolitan and enterprise networks. Recently, the performance of DWDM components and frequency-stabilized lasers has substantially improved while the costs have down significantly. This makes a variety of new optical network architectures economically viable. The first commercial 8- wavelength DWDM system designed for Hybrid Fiber Coax networks was reported in 1998. This type of DWDM system utilizes Sub-Carrier Multiplexing (SCM) of Quadrature Amplitude Modulated (QAM) signals to transport IP data digital video broadcast and Video on Demand on ITU grid lightwave carriers. The ability of DWDM to provide scalable transmission capacity in the optical layer with SCM granularity is now considered by many to be the most promising technology for future transport and distribution of broadband multimedia services.

Paper Details

Date Published: 21 April 2000
PDF: 9 pages
Proc. SPIE 3949, WDM and Photonic Switching Devices for Network Applications, (21 April 2000); doi: 10.1117/12.382883
Show Author Affiliations
JengRong Yeh, Harmonic, Inc. (United States)
Mark D. Selker, Harmonic, Inc. (United States)
J. Trail, Harmonic, Inc. (United States)
David Piehler, Harmonic, Inc. (United States)
Israel Levi, Harmonic, Inc. (United States)


Published in SPIE Proceedings Vol. 3949:
WDM and Photonic Switching Devices for Network Applications
Ray T. Chen; George F. Lipscomb, Editor(s)

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