DWDM architectures for video on demand transport and distribution

Yeh, Jeng-Rong; Selker, Mark D.; Trail, J.; Piehler, D.; Levi, I.M.

doi:10.1109/leosst.1999.794735

Cited by 3 publications

(1 citation statement)

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“…In the electrical domain, owing to the availability of directly modulated lasers with very good linearity as well as the inherent ability to simultaneously carry analog/digital messages, subcarrier multiplexing (SCM) is a very flexible scheme to transmit multimedia signals with varied formats and speeds. Obviously, the joint DWDM/SCM technique is an attractive way for implementing broad-band subscriber networks, being able to offer two dimensions of flexibility in both electrical and optical domains [3], [4].DWDM with wavelength add-drop multiplexer (WADM) and optical cross-connect (OXC) or with waveguide grating router (WGR) can offer network scalability and service Manuscript…”

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confidence: 99%

A DWDM/SCM self-healing architecture for broad-band subscriber networks

Lin

Kao

Chi

2003

J. Lightwave Technol.

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A high-capacity dense wavelength-division multiplexing/subcarrier multiplexing (DWDM/SCM) network based on a self-healing star-bus-ring architecture (SBRA) is proposed and demonstrated. This architecture has a star subnet on the upper level to be a high-capacity infrastructure for the network, several bus subnets on the middle level to offer broad-band channels for multiwavelength signals, and many ring subnets on the lower level to serve a number of nodes. We design remote nodes and bidirectional wavelength add-drop multiplexers (WADMs) by using simple optical switches to reconfigure the network under link failure. We further employ -quadrature amplitude modulation (M-QAM) and frequency shift-keyed (FSK) signals for downstream and upstream channels, respectively. The SBRA ensures an optical-beat-interference-free (OBI-free) and high-reliability optical network. Finally, we set up an experimental network to demonstrate the feasibility of the proposed architecture. Index Terms-B-wavelength add-drop multiplexer (WADM), broad-band subscriber network, dense wavelength-division multiplexing/subcarrier multiplexing (DWDM/SCM), -quadrature amplitude modulation (M-QAM), star-bus-ring architecture (SBRA). I. INTRODUCTIONT HE ARCHITECTURE of future broad-band networks should provide large capacity, excellent flexibility, and high reliability [1], [2]. In the optical domain, the dense wavelength-division multiplexing (DWDM) is a cost-effective technique to dramatically increase the network capacity and best use the fiber's huge bandwidth. In the electrical domain, owing to the availability of directly modulated lasers with very good linearity as well as the inherent ability to simultaneously carry analog/digital messages, subcarrier multiplexing (SCM) is a very flexible scheme to transmit multimedia signals with varied formats and speeds. Obviously, the joint DWDM/SCM technique is an attractive way for implementing broad-band subscriber networks, being able to offer two dimensions of flexibility in both electrical and optical domains [3], [4].DWDM with wavelength add-drop multiplexer (WADM) and optical cross-connect (OXC) or with waveguide grating router (WGR) can offer network scalability and service Manuscript

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confidence: 99%