wavelength Resources

ZDNet Dictionary Definition

Wavelength: The distance between crests of a wave. The wavelength determines the nature of the various forms of radiant energy that comprise the electromagnetic spectrum. For electromagnetic waves, the...; Full Wavelength Definition >>

ZDNet Resources

Satellites seeing clearly despite clouds: Two researchers at Pacific Northwest National Laboratory PNNL have developed a mathematical tweak which dramatically improves air pollution detection on cloudy days. They've found a way to reduce cloud-induced glare when satellites measure blue skies on cloudy days, by as much as ten-fold in some cases. 'Because clouds represent one...; Tags: Wavelength, Pollution, Pacific Northwest National Laboratory, Satellite, Network Technology, Networking, Roland Piquepaille; Blog posts 2008-05-13
New+%22GiFi%22+wireless+chip+unveiled%3A+5+gigs+per+second+up+to+10+meters%21: New+%22GiFi%22+wireless+chip+unveiled%3A+5+gigs+per+second+up+to+10+meters%21Practical?Not.Here's an idea. Let's use light. It has even shorter wavelengths and can transmit gobs of data. Oh, wait. It can't penetrate walls.That's a problem you being to run into with shorter and shorter wavelengths. millimeter wavelengths don't penetrate structures very well at all.That can be good thoughTake for instance...; Tags: wavelength; Discussion threads 2008-02-22
120 Mbps upstream? Even 30 Mbps? Come on- who really needs it?: Note: I've amended this post with corrective information, including this from our networking guru, George Ou. George,an actual engineer, points out: You cannot claim DOCSIS 3.0 is 160/120 down/up service and compare it to 50/30 down/up FiOS service. That is grossly misleading. 160/120 down/up in...; Tags: Wavelength, DOCSIS, Mbps, Home, FiOS, Cable, Broadband Internet, Corporate Communications, Telecommunications, Personal Technology, Marketing, Russell Shaw; Blog posts 2007-12-03
Images: Streaking star carries a tail of seeds: NASA discovered that a red-giant star rocketing across the universe is leaving a trail of debris that could eventually form new stars, solar systems and even life.NASA scientists are estatic over the discovery of a tail or trail of gas and dust trailing the red giant star Mira as it...; Tags: Mira, tail, wavelength, trail, debris, scientist, shock, NASA; Image galleries 2007-08-16
Lenses that bring everything into focus: Scientists at the University of Michigan have developed a new lens device that will shrink huge light waves to pinpoints. The superlens looks like a plate and "is etched with a specific pattern. As the waves pass through the patterned lens, it is sculpted into different sizes and shapes. The...; Tags: Engineering &, Innovation, Nanotechnology, Science &, Nature; Blog posts 2007-07-14

NXTcom bears witness to ROADM's major role in broadband video distribution: I type: ROADM.You think: ah, short for "Road Map."That may well be the case, but not here at NXTcomm here in Chicago.One of the major themes of this major telecom industry event is greatly I am going to make up a word here efficientized video delivery by use of a...; Tags: NXTComm, News, General; Blog posts 2007-06-19
A terabyte of data on a regular DVD?: This is the promise of the 3-D Optical Data Storage system developed at the University of Central Florida UCF. This technology allows to record and store at least 1,000 GB of data on multiple layers of a single disc. The system uses lasers to compact large amounts of information onto...; Tags: laser, wavelength, Engineering &, Innovation, Computers &, Internet; Blog posts 2006-12-07
Woman claims Wi-Fi makes her sick: Woman claims Wi-Fi makes her sickNew age rubbish![i]"but none of them has been able to prove Wi-Fi is safe"."[/i]Yeah - and nobody has been able to prove that wearing crystals cures cancer, colds and flu nor has anyone been able to prove that lying down with a candle on either...; Tags: Wireless LANs, wavelength, Wi-Fi, radio, cordless phone, radiation, phone; Discussion threads 2006-11-24
A photonic 'lab-on-a-chip': Georgia Tech researchers have shrunk an optical device called wavelength demultipler WD by combining into one crystal three unique properties of photonics crystals. This optical discovery opens the way to sophisticated and cheap biosensors mounted on 'lab-on-a-chip' devices -- sensors to run blood tests, detect chemicals in water supplies or...; Tags: wavelength, wavelength demultipler; Blog posts 2006-08-06
Design Tools for Transparent Optical Networks: Optical technology promises to revolutionize data networking by providing enormous bandwidth for data transport at minimal cost. A key to cost reduction is to increase transparency, that is, to keep a data stream encoded as an optical signal for as long as possible. Wavelength switching increases transparency by allowing different...; Tags: Optical Network, Wavelength, Tool, Fiber Optics, Optical Networking, Productivity, Networking, Telecommunications; White papers 2006-08-04
Broadband fiber ain't what it used to be: There's a mythology out there, spread by the uninformed, that since 90 percent of broadband fiber is sitting in the ground and we getting exponentially better at sending massive amounts of bits through the air, that fiber's time has come and gone. Not so. As the demand for rich...; Tags: fiber; Blog posts 2006-02-23
Time-Domain Wavelength Interleaved Networking With Wavelength Reuse: Time-domain Wavelength Interleaved Networking TWIN is a cost-effective network architecture that can provide fine-grained, flexible connectivity using passive optics in internal nodes. Each wavelength is dedicated to carry traffic to a single node. This paper introduces TWIN with Wavelength Reuse (TWIN-WR), an extension of TWIN that allows the number of...; Tags: Network, Wavelength, Time-domain Wavelength Interleaved Networking, Engineering, Networking; White papers 2006-01-09

Additional Resources

RAD'S Ethernet NTU's Provide Interoute With End-to-End Customer Visibility: Interoute owns and operates Europe's largest Next Generation network. The company wanted to deliver managed Ethernet services with challenging end-to-end SLAs over a network that spans several providers. Interoute's Ethernet Flex and Ethernet Clear offer customers private connections between sites, and it is here where RADs ETX-202 Ethernet network termination...; Tags: RAD, Interoute, Ethernet Flex, Ethernet, Network Technology, Networking; Case studies 2008-05-22
AudioCalc (zip): AudioCalc is a simple utility which calculates audio file sizes. Given any bit depth, sample rate, number of tracks, and number of channels (mono/stereo). AudioCalc can tell you either how much space a file or set of files of a given length and format will take up or. How long...; Tags: Audio, AudioCalc; Software downloads 2008-04-15
Limitations of Transmission Distances Over Multimode Fiber: Multimode fiber simply refers to the fact that numerous modes or light rays are carried simultaneously through the waveguide. One key characteristic of a multimode fiber is its modal bandwidth. It represents the capacity of a fiber to transmit a certain amount of information over a certain distance and is...; Tags: Fiber, Multimode Fiber, Network Technology, Networking; White papers 2008-04-01
How I (finally) shared a Wi-Fi connection with my neighbors: How I finally shared a Wi-Fi connection with my neighborsNice Work!ntRE: How I finally shared a Wi-Fi connection with my neighborsInteresting but just a small technical point. the "signals" are radio waves that travel in straight lines. nothing can make the signal "wend it's way around the metal...; Tags: Wireless LANs, WIRELESS, Network technology, Wi-Fi connection, Wi-Fi, cable; Discussion threads 2008-03-18
Don't cry for the open-source heroes: I don't think anyone will be shedding any tears over Microsoft's open-source heroes promotion -- except possibly for true open-source zealots who still hate the idea that Microsoft is managing to convince some open-source vendors to port their wares to Windows. On February 27, Microsoft will hold...; Tags: Microsoft Word, Microsoft Windows Server, Microsoft Corp., Microsoft Windows, Microsoft Windows Server 2008, Operating Systems, Open Source, Servers, Software, Hardware, Mary Jo Foley; Blog posts 2008-02-15
Smart holograms to monitor our health?: In a short news release, the Institute of Physics reports that smart holograms, which use materials called hydrogels that shrink or swell in response to local environmental conditions, can be used to monitor many physical conditions than three years ago. These smart holograms could soon be used 'by diabetics to...; Tags: Monitor, Hologram, Health Care, Polymer, Roland Piquepaille; Blog posts 2008-02-05
On Multicasting in Wavelength-Routing Mesh Networks: This paper considers multicasting on wavelength-routing mesh optical networks. Although multicasting has been studied extensively in different network environments, multicasting in this environment is different, and more involved. The paper discusses the challenges of multicast support in optical wavelength routing networks, and reports on the advances made so far in...; Tags: Iowa State University, Multicasting; White papers 2008-01-01
Light Trails: A Sub-Wavelength Solution for Optical Networking: All-optical networks are able to transport data from source to destination entirely in the optical domain. This is a departure from current optical networks that rely on Optical-Electrical-Optical OEO conversion at each intermediate connection node to route data properly. The opacity inherent in traditional networks is costly in terms of...; Tags: Iowa State University, MPLS, Network, Node, Networking, Fiber Optics, Network Technology, Optical Networking, Telecommunications; White papers 2008-01-01