Optical Transport Network

About: Optical Transport Network is a research topic. Over the lifetime, 6055 publications have been published within this topic receiving 85783 citations.

How will optical transport deal with future network traffic growth

Abstract: Traffic will undoubtedly continue to grow, but it is important to put this into perspective. This presentation will categorize growth rates and propose cost effective solutions in Access, Metro and Long Haul without the need to replace existing fiber.

Optical network system with quality control function

Abstract: To ensure transmission in a flexible optical network system, a digital test signal generation/comparison circuit is incorporated in an electrical signal processing portion of a transponder. The optical network system provides transparent wavelength-division multiplex service regardless of the signal type in client optical signals. Prior to connecting a client optical line to the optical system, a selective insertion unit and a selective extraction unit enable quality assessment of the client optical line.

2/sup n/ prime-sequence codes and coding architecture for optical code-division multiple-access

Abstract: Recent study shows that optical code-division multiple-access (CDMA) networks cannot be evaluated or designed by only considering the performance (i.e., correlation properties) of the optical pseudo-orthogonal codes selected. The structures of optical encoders and decoders are another important factors to consider and are needed to coordinate with the selected optical codes as much as possible. A special family of 2/sup n/ codes, so-called 2/sup n/ prime-sequence codes, is constructed. A general theorem on the cardinality of the new codes is provided. The properties and performance of the codes are also studied. Since these codes pose the algebraic properties of both prime-sequence and 2/sup n/ codes, new optical encoding and decoding structures are designed to optimize the system parameters (e.g., power budget and cost) of these optical CDMA networks. This new configuration is particularly attractive for ultrafast optical processing and waveguide implementation for tile future high-capacity, low-loss, all-optical CDMA networks.

Routing in an AWG-based optical packet switch

Abstract: For the next generation of the optical internet, focus is now moving from circuit switched networks, which occupy a wavelength continuously regardless of the demand at that time, towards optical packet/burst switching By only occupying a wavelength when data is to be transmitted, a more efficient utilization of bandwidth in optical fibers is strived for As bandwidth in fibers keeps increasing, the bottleneck of the optical network is now moving towards the switching node, since evolution of electronic routers cannot follow the speed of bandwidth increase Thus a key component in these novel networks is the optical node Through this node we want to switch traffic very fast and reliably, preferably transparent Lack of efficient and practically realizable optical buffer, however, makes migration from electronic routers to optical routers a non-straightforward transition In most optical nodes payload traffic can be switched transparently, whilst control information (eg, in a header, on a control channel) is still converted to the electronic domain in every node, since optical processing is far from mature In this paper we present a possible architecture for such a node, array waveguide gratings and all-optical tuneable wavelength converters The concept of this switch is explained and the node is evaluated in terms of loss rate We will see that an inherent problem of this switch is its internal blocking This drawback can be greatly overcome by using an intelligent and efficient wavelength assignment algorithm within the node Simulation of slotted operation will give some numerical results

Optical communications system and method

Abstract: Optical communications systems and methods are disclosed which involve routing optical signals through communications nodes which are controlled such that optical power arriving at input ports is linearly distributed to output ports. Such distribution may be realized by electro-optical, acousto-optical, or electro-mechanical controllable linear divider-combiner devices (401, 405, 411, 415). Preferred systems including optical fiber links can be designed to make maximum use of physically realizable bandwidth, and to achieve high reliability in case of faults.