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The emergence of high-definition television (HDTV), IPTV, and video-on-demand services, along with the advent of peer-to-peer video applications, has placed a strain on the bandwidth requirements and operational efficiency of [...]

When it comes to network reconfigurability, there seems to be a gap between the capabilities network architects say they want and the attributes of the devices network operators actually are [...]

Enterprises increasingly rely on networked applications to improve productivity. Enterprise IT staffs have scaled internal LANs to accommodate the rise of high-bandwidth applications, including Internet access and business continuity. Upgrading [...]

Remote reconfigurability of the optical transport layer has the potential to significantly lower operations expenses in metro, regional, and long-haul networks. Recognizing this potential, recent service-provider-network RFPs have included requirements [...]

CWDM systems are considered a low-cost alternative to DWDM systems. They take advantage of low-cost, uncooled distributed feedback (DFB) lasers and less stringent wavelength multiplexing and demultiplexing components. Individual CWDM [...]

By all accounts, reconfigurable optical add/drop multiplexer (ROADM) technology has become mainstream. First adopted by the cable multiple-system operators (MSOs), ROADMs now are finding applications in ILEC, CLEC, IOC, mobile [...]

The industry has been buzzing about reconfigurable optical add/drop multiplexers (ROADMs) since SuperComm 2004, which proved to be a coming out party of sorts for the technology. Today, a new [...]

Thin-film filters (TFFs) and arrayed wave-guide gratings (AWGs) are the two major optical platforms for DWDM multiplexer/ demultiplexers. AWGs have the advantage of semiconductor batch processing and thus of fer [...]

Reconfigurable optical add/drop multiplexers (ROADMs) have been hailed as an essential building block lot the next generation of DWDM networks. Analyst firms are predicting huge increases in ROADM revenue and [...]

The worst of the telecommunications shakeout may be over, but carriers have not returned to the level of network investment, or revenues, of just a few years ago. While capital [...]

Carriers today are less preoccupied with 'new generation' technology and net-works and more with the lowest cost for delivering bandwidth. Lower startup cost, lower expansion cost, and lower operating expenses [...]

Lucent Technologies (Murray Hill, NJ) announced a one-year, $90-million agreement with TyCom Ltd. (Morristown, NJ) for optical-networking systems and services. The agreement includes deployment of the Lucent WaveStar OLS 1.6T [...]

The use of higher-order modulations together with subcarrier multiplexing provides inherent capabilities and features highly attractive to network operators. Demand for more flexible bandwidth creation at lower cost is causing [...]

MetroRED Telecommunicaoces (Sao Paulo, Brazil) will deploy Ciena Corp.'s (Linthicum, MD) MultiWave CoreStream intelligent optical transport systems for its high-capacity network connecting Sao Paulo and Rio de Janeiro. The deployment [...]

Fujitsu Network Communications Inc. (Richardson, TX) will deploy its FLASHWAVE 320G DWDM system and FLASH 192 fiber-optic multiplexer on 360networks' (Vancouver) fiber-optic mesh network in Europe. The system will connect [...]

Broadband communications services provider NEXTLINK Communications Inc. (McLean, VA) has signed a contract with Lucent Technologies (Murray Hill, NJ) to deploy Lucent's WaveStar TDM I OG and WaveStar BandWidth Manager [...]

Actually, it's not whether one technology will win or lose--it's how your network plays the multiservices game. Today, most carrier services, including Internet Protocol (IP), are delivered over a time-division [...]

Beijing Telecommunications Administration (BTA-Beijing) will be the first to deploy Lucent Technologies' (Murray Hill, NJ) WaveStar10G system in China. BTA will use the technology to boost the capacity of its [...]

Lucent Technologies (Murray Hill, NJ) signed agreements with three European customers to deploy products from its WaveStar 10G optical-networking product line. In the United Kingdom, BT (London) will deploy the [...]

LighTrade Inc. (Washington DC) signed an agreement with Lucent Technologies (Murray Hill, NJ) valued at up to $50 million to create a new network using Lucent's WaveStar bandwidth manager and [...]

Optical-amplifier technology is evolving to address a wider spectrum of applications and new markets. The development of erbium-doped fiber amplifiers (EDFAs), more than any other technology, has enabled the proliferation [...]

Why would an enterprise adopt wavelength-division multiplexing? For the same reasons as larger networks. Wavelength-division multiplexing (WDM) is clearly expanding beyond the long haul into metropolitan-area and customer-premises networks. By [...]

Scientific-Atlanta (Atlanta) announced that its Prisma digital-transport fiber-optic system was installed and activated in two networks at Comcast of Connecticut, enabling the delivery of digital interactive services and other traffic [...]

Fiber Bragg gratings and wavelength-division multiplexing (WDM) have evolved as complementary technologies that can enable fiber-optic networks to push the limits in terms of capacity. Fiber gratings perform functions such [...]

iaxis (London) announced further plans for working with CIENA Corp. (Linthicum, MD) to build next-generation optical networks with CIENA's LightWorks suite of optical-networking solutions. The carrier issued purchase orders for [...]

Marconi Communications (Cleveland) is supplying its SmartPhotoniX OSR multi-service SONET multiplexers to Bermuda Telephone Co. Ltd. (Hamilton, Bermuda). Bermuda Telephone is deploying a fiber-optic telephone network using SONET rings throughout [...]

The introduction of dense wavelength-division multiplexing (DWDM) technology into the metropolitan market appears to have its share of proponents and skeptics. While legitimate bandwidth needs exist in limited portions of [...]

Remote fiber test systems (RFTSs) are increasingly viewed as key instruments for supervising and maintaining fiber networks. Fast and accurate physical localization is regarded as the main advantage of such [...]

Sales of dense wavelength-division multiplexing (DWDM) equipment will rise from $2.2 billion in 1998 to $9.4 billion in 2004, according to a new study being released by Kessler Marketing Intelligence [...]

Dense wavelength-division multiplexing (DWDM) offers carriers the potential for vast increases in the availability of bandwidth. Until recently, the focus of DWDM application has been almost exclusively on the national [...]

Two ubiquitous themes have emerged in the telecommunications industry today: unprecedented traffic growth and carrier competition. Exponential growth in data traffic has created a massive revenue opportunity for communications service [...]

Wavelength-division multiplexing (WDM) used to be the exclusive domain of deep-pocket network owners-the long--distance telecommunications providers. Not any more. Today, this technology is being harnessed for local- and metropolitan-area networks. [...]

Enterprises need superior network performance, increased bandwidth, and additional capacity to run their day-to-day business applications effectively and maintain competitive advantages in their markets. At the same time, networks that [...]

The tradeoffs between fibers that maximize effective area versus those that minimize dispersion slope in long-haul terrestrial networks indicate that each type is best suited for specific applications. Designed for [...]

Plomteux, Olivier This article reviews the critical parameters of tunable laser sources (TLSs) in the field of wavelength-division multiplexing (WDM) testing. We will review the performance characteristics of an innovative [...]

MCI WorldCom Inc. (Jackson, MS) will put Lucent Technologies (Murray Hill, NJ) new WaveStar 40G Express single-laser optical-transmission system to the test for commercial use. The system is capable of [...]

Osicom Technologies Inc. (Santa Monica, CA) announced that its optical-networking business unit secured a $20-million agreement with a U.S. competitive local-exchange carrier (CLEC) to provide the Osicom GigaMux Metro DWDM [...]

Reconfigurable optical add/drop multiplexers (ROADMs) are the new hot topic in the industry, thanks to a flurry of carrier RFPs and a plethora of vendors showcasing their ROADM components and [...]

Optical add/drop multiplexers (OADMs) enable channels to be added or dropped from a group of channels in a DWDM network. Most of the OADMs in operation today are two-, four-, [...]

Corvis Corp. (Columbia, MD), a provider of intelligent optical-networking equipment, announced that France Telecom (Paris) will field-test Corvis's optical-networking products, including the CorWave LR, along an 800-km terrestrial link using [...]

ECI Telecom also has demonstrated what it claims is the industry's first successful 43-Gbit/sec transmission over 1,000 km via a 10-degree, 50-GHz channel-spaced wavelength-selective switch (WSS) reconfigurable optical add/drop multiplexer [...]

For service providers seeking to differentiate new broadband service delivery on next-generation metro networks, ROADMs are an essential network element for scaling service delivery to meet the explosive growth of [...]

As part of a move to evolve its SONET infrastructure to a next-generation multiservice provisioning platform (MSPP) designed to improve network efficiencies and better support new optical solutions, BellSouth (Atlanta) [...]

Range Telephone Cooperative (Forsyth, MT) has selected Fujitsu Network Communications' (Richardson, TX) FLASHWAVE 4300 and FLASHWAVE 4500 optical transport platforms and the FLEXR GT craft interface software to connect and [...]

Essex (Columbia, MD), a manufacturer of ultra-dense WDM products, announced that Telcordia Technologies (Morristown, NJ) is using an Essex 6.25-GHz hyperfine WDM device to complement its multiwavelength laser technology envisioned [...]

* Looking Glass Networks (Oak Brook, IL) has selected DWDM equipment from Sorrento Networks (San Diego) for deployment in its Washington, DC, fiber-optic network. Looking Glass has purchased Sorrento's GigaMux [...]

* Centerpoint Broadband Technologies Inc. (San Jose, CA) has deployed and integrated its Celerity CP 3200 (formerly the Zaffire Z3000) DWDM equipment to carry high-speed data traffic between FLAG Telecom's [...]