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IBM Claims Optical Chip Breakthrough
News Researchers at IBM have published a paper demonstrating how optical signals — photons that represent data — travelling within a microprocessor can be delayed, a key element in developing chips that can relay signals with optical fibre.
[December 21, 2006, 7:45]
IBM Claims Optical Computing Breakthrough
News Such a fast download is possible because of the use of optical signals instead of normal electronic signals. Whereas electronic signals must travel down physical hardware paths in chips, optical signals use the much wider optical spectrum and can...
[March 29, 2007, 17:04]
ST Micro Sees Silicon Light
News Optical components exchange signals via photons of light. Though other companies have been working in the same area, ST Microelectronics claims that its advance, which involves implanting rare-earth metals such as erbium and cerium into the chip...
[October 29, 2002, 8:01]
The Day Ahead: Corvis IPO Set To Soar On Promising Products
News Corvis would make things much more efficient with its gear, which can transmit optical signals up to 3,200 kilometres compared to 400 to 600 kilometres for traditional equipment. Corvis' products, which just began shipping, enable long-haul...
[July 28, 2000, 12:38]
Tech Firms Urged To Focus On Electromagnetics
News The report highlights four key areas: optical telecoms switches that would be much faster than current networks which use electric signals for routing and data storage; advanced CCTV cameras that would "search" people remotely by monitoring...
[May 4, 2004, 12:35]
Sycamore Networks Makes Spectacular US IPO Debut
News Current equipment converts optical signals into electrical signals and then converts it back. The optical networking equipment provider nearly doubled its price range to $35 to $37 from its previous range of $18 to $20.
[October 25, 1999, 11:34]
Light 'slowed' To Speed Up Data Transfer
News Optical signals travel at 62,000 miles a second down fibre. Ultimately, however, these signals must be converted into electrical signals, the kind silicon chips rely on to convey information. Electrical signals are much slower, creating network...
[September 29, 2004, 10:25]
Sapphire When Ready For Laser Chips
News However, because sapphire is also optically transparent, lasers built into the silicon can fire through the substrate and send signals to the outside world. The same system can be used within a chip to move signals around.
[January 8, 2002, 17:45]
Xerox Chip Makes Fibre Cheaper
News UK-based QuantumBeam is looking at ways of connecting buildings to fibre through free-space optics, or optical signals that travel in the air between rooftop receivers. Researchers at other companies are also looking at ways to convert optical...
[March 27, 2003, 15:09]
Nanotubes Shed New Light On Fibre Optics
News One method, called optoelectronics, involves converting optical signals into electrical signals, which can then be sent through inexpensive silicon. Several companies are currently trying to find ways to combine optical and silicon technologies.
[May 2, 2003, 7:57]
UK Start-up To Commercialise Optical Silicon
News STMicroelectronics last year announced it had developed a technique that could allow silicon chips to create a beam of light capable of carrying signals, while other research has focused on light-emitting nanotubes and other methods.
[November 5, 2003, 17:20]
IBM's Supercomputer Chip Breakthrough More PR Than IT
Blog The breakthrough - known in the industry as a silicon Mach-Zehnder electro-optic modulator - performs the function of converting electrical signals into pulses of light. In a paper published in the journal Optics Express, the IBM researchers...
[December 6, 2007, 14:43]
Photos: Inside IBM's Zurich Research Lab
News Today's microprocessors are so small inside that signals leak and create interference, which is a problem that will only get bigger as the channels get smaller. Can nanowires conduct electrical signals in nanoscale structures?
[May 22, 2006, 13:15]
Design And Experimental Implementation Of A Hybrid Optical Performance Monitoring System For In-Service SLA Guarantee
White Papers This paper presents an experimental, in-service optical performance monitoring system, which is hybrid in nature due to the use of both spectral (optical signals) and time -domain (digital) measurements to guarantee Service Level Agreements (SLA).
[August 4, 2006, 0:00]
Networks Of Light Build On Cellphone Tech
News The University of California at Davis announced this week it has received a grant from the Defense Department to build a new generation of mobile phones that transmit and receive optical signals. That technology, called Code Division Multiple...
[November 27, 2002, 15:57]
A New SDH Traffic Model For W-DCS Performance Evaluation
White Papers Digital Cross-Connect System (DCS), used for distributing and crossconnecting the synchronous optical and asynchronous electrical signals, plays very important role as transmission equipment in the transport networks, is the performance evaluation...
[October 29, 2004, 0:00]
Carrying Microwave Signals In A GIPOF-Based Wireless LAN
White Papers By applying fast sweeping of the laser wavelength at the headend station and a multi-passband optical filter at the antenna stations, multi-GHz radio signals can be distributed cost-effectively using GIPOF links in a wireless LAN.
[December 6, 2007, 23:00]
RAD Helps China Telecom To Reduce Opex Costs, Accelerate Provisioning Of Broadband Services To Millions Of Subscribers
White Papers The AMC-101 provides retimed or transparent conversion of optical and electrical signals for ATM, SDH/SONET and other protocols at data rates up to 155 Mbps. Guangdong Datacom Bureau (GDB), which owns the fastest growing broadband network...
[October 27, 2004, 0:00]
Intel Gets Optical With Fibre
News Unlike wires, which transfer signals with electrons, optical fibre depends on photons, which are far faster and don't generate heat. It's going to take a number of years, but optical fibre is going to get inside your PC.
[March 1, 2004, 14:25]
Introduction To SONET
White Papers The other major advantage is that SONET allows ADDING and DROPING signals with a single multiplexer. For example, the DS1 signals consist of 24 voice signals and one framing bit per frame. SONET stands for Synchronous Optical NETwork.
[December 18, 2003, 23:00]
