Digital services using quadrature amplitude modulation (QAM) over CATV analog DWDM system

JengRong Yeh; Mark D. Selker; J. Trail; David Piehler; Israel Levi

doi:10.1117/12.382883

21 April 2000 Digital services using quadrature amplitude modulation (QAM) over CATV analog DWDM system

JengRong Yeh, Mark D. Selker, J. Trail, David Piehler, Israel Levi

Proceedings Volume 3949, WDM and Photonic Switching Devices for Network Applications; (2000) https://doi.org/10.1117/12.382883
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

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.

Citation Download Citation

JengRong Yeh, Mark D. Selker, J. Trail, David Piehler, and Israel Levi "Digital services using quadrature amplitude modulation (QAM) over CATV analog DWDM system", Proc. SPIE 3949, WDM and Photonic Switching Devices for Network Applications, (21 April 2000); https://doi.org/10.1117/12.382883

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KEYWORDS

Dense wavelength division multiplexing

Video

Quadrature amplitude modulation

Analog electronics

Modulation

Transmitters

Receivers

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