scispace - formally typeset
Search or ask a question
Topic

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.


Papers
More filters
Patent
17 Sep 1992
TL;DR: In this paper, the output powers and the signal-to-noise ratios are selectively equalized by adjusting the optical input signal powers of an erbium-doped fiber amplifier.
Abstract: Increasing the capacity of an existing lightwave transmission system can be accomplished by either increasing the bit rate or adding wavelength-multiplexed channels Recent advances in erbium-doped fiber amplifier technology make the wavelength division multiplexed option particularly attractive Unfortunately, because of nonuniform wavelength-dependent gain profile and saturation characteristic of erbium-doped fiber amplifiers, each channel of a wavelength-multiplexed system will experience a different optical gain which, in turn, can result in an excessive bit-error-rate performance in some channels This invention is directed toward processing apparatus which selectively equalizes the optical gain or the optical signal-to-noise ratios of the channels of a wavelength-multiplexed optical transmission system The output powers and the signal-to-noise ratios are selectively equalized by adjusting the optical input signal powers With this invention, wavelength-multiplexed channels can be added to an existing optical fiber transmission system without requiring new optical components, upgrades or adjustments at intermediate amplifier sites

181 citations

Journal ArticleDOI
TL;DR: This paper examines the future potential of OPS in the core network by discussing this switching approach and the current status of a number of its enabling technologies and sees that optical packet switching may be deployed in the long-term future subject to satisfaction of three main conditions/developments.
Abstract: The research on optical packet switching (OPS) has witnessed considerable progress in the 1990s. We examine the future potential of OPS in the core network by discussing this switching approach and the current status of a number of its enabling technologies. Many of these technologies are still in the stage of research and experimentation. We see that optical packet switching may be deployed in the long-term future subject to satisfaction of three main conditions/developments. First, additional technological developments have to take place to overcome remaining implementation challenges while making OPS cost-effective to deploy. Second, a rational migration scenario of the network toward gradual deployment of packet-based optical switching approaches should exist. Finally, carriers have to become more interested in packet-based optical switching solutions.

179 citations

Patent
16 Oct 2008
TL;DR: In this article, the authors proposed a WDM PON system in which an optical signal outputted from a central office is injected into a Fabry-Perot laser diode (F-P LD) as the light source of an optical network unit.
Abstract: Disclosed is a wavelength division multiplexing passive optical network (WDM PON) system in which an optical signal outputted from a central office is injected into a Fabry-Perot laser diode (F-P LD) as the light source of an optical network unit, so that the output wavelength of the optical network unit is injection-locked at the same wavelength as that of the optical signal outputted from the central office, thereby enabling the optical network unit to output an optical signal having the same wavelength as that of the optical signal outputted from the central office. In accordance with this system, it is possible to transmit and receive forward and backward data at the same wavelength by the unit of channels. Since inexpensive F-P LDs are used as respective light sources of the central office and optical network units, it is possible to efficiently and economically implement a WDM PON system.

177 citations

Journal ArticleDOI
TL;DR: The architectural alternatives for interconnecting IP routers over optical networks, considering the routing and signaling issues are described and the application of IP-based protocols for dynamic provisioning and restoration of lightpaths, as well as the interworking of multivendor optical networks is described.
Abstract: The Internet transport infrastructure is moving toward a model of high-speed routers interconnected by intelligent optical core networks. A consensus is emerging in the industry on utilizing an IP-centric control plane within optical networks to support dynamic provisioning and restoration of lightpaths. At the same time, there are divergent views on how IP routers must interact with optical core networks to achieve end-to-end connectivity. This article describes the architectural alternatives for interconnecting IP routers over optical networks, considering the routing and signaling issues. Also, the application of IP-based protocols for dynamic provisioning and restoration of lightpaths, as well as the interworking of multivendor optical networks is described.

177 citations

Journal ArticleDOI
TL;DR: In this article, the authors describe specific fiber impairments that future intelligent optical network might want to monitor as well as some promising techniques, which could potentially enable higher stability, reconfigurability, and flexibility in a self-managed optical network.

177 citations


Network Information
Related Topics (5)
Optical fiber
167K papers, 1.8M citations
86% related
Semiconductor laser theory
38.5K papers, 713.7K citations
84% related
Transmission (telecommunications)
171.3K papers, 1.2M citations
82% related
Photonics
37.9K papers, 797.9K citations
82% related
Network packet
159.7K papers, 2.2M citations
81% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202237
202132
202060
201998
201884