News tagged with optical transmission
Fujitsu develops innovative anti-distortion technology to cut energy use by two-thirds
Fujitsu today announced the development of a digital signal processing algorithm to compensate for waveform distortion in long-haul transmission systems of over several hundreds of kilometers. This, in turn, ...
Mar 09, 2012 |
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World's first field trial of 10Gbit/s-100km class high speed and wide area optical access
Nippon Telegraph and Telephone Corporation has succeeded in the field trial of an optical amplification technology that realizes 10Gbit/s-100km class high speed and wide area optical access networks.
Mar 07, 2012 |
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The world’s fastest Y-00 stream cipher transmission at 40 Gbit/sec over 120 km
Fumio Futami at Tamagawa University, Quantum ICT Research Institute, announced the world first transmission of the stream cipher by Yuen 2000 protocol (Y-00) at the bit rate of 40 Gbit/sec over 120 km.
Mar 06, 2012 |
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NTT researchers develop breakthrough optical memory device
(PhysOrg.com) -- To improve transmission speeds, the Internet has transitioned over the years from one using copper to fiber optic cabling. Unfortunately, this has caused a bottleneck to occur where the light ...
Feb 27, 2012 |
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NTT develops current-injection photonic-crystal laser
Nippon Telegraph and Telephone Corporation has developed an current-injection photonic-crystal laser with ultralow power consumption that can be applied to off-chip and on-chip optical data transmission for ...
Feb 14, 2012 |
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Microscopy reveals 'atomic antenna' behavior in graphene
Atomic-level defects in graphene could be a path forward to smaller and faster electronic devices, according to a study led by researchers at the Department of Energy's Oak Ridge National Laboratory.
Nanotechnology / Nanomaterials
Jan 31, 2012 |
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How long do electrons live in graphene?
Together with international colleagues, scientists from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have added another important component towards understanding the material graphene; a material that is ...
Dec 12, 2011 |
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Keeping our beaches safe: New wireless sensor device rapidly detects E. coli in water samples
Fecal contamination of public beaches caused by sewage overflow is both dangerous for swimmers and costly for state and local economies. Current methods to detect Escherichia coli, a bacterium highly indicative of the pr ...
Dec 08, 2011 |
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Blocked holes can enhance rather than stop light going through
Conventional wisdom would say that blocking a hole would prevent light from going through it, but Princeton University engineers have discovered the opposite to be true. A research team has found that placing ...
Nov 22, 2011 |
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Using nanophotonics to reshape on-chip computer data transmission
A team at Stanford's School of Engineering has demonstrated an ultrafast nanoscale light emitting diode (LED) that is orders of magnitude lower in power consumption than today's laser-based systems and able ...
Nov 15, 2011 |
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New metamaterial allows transmission gain while retaining negative refraction property
A new type of active metamaterial that incorporates semiconductor devices into conventional metamaterial structures is demonstrating an ability to have power gain while retaining its negative refraction property, a first ...
Nov 09, 2011 |
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Coming soon to a server near you: fewer internet delays
(PhysOrg.com) -- Researchers at the UA-led Center for Integrated Access Networks, the largest optical research center in the U.S., are developing methods to improve transmission speed, efficiency and reliability ...
Nov 04, 2011 |
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Using photons to manage data
Managing light to carry computer data, such as text, audio and video, is possible today with laser light beams that are guided along a fibre-optic cable. These waves consist of countless billions of photons, ...
Nov 02, 2011 |
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Spin lasers in the fast lane: New concept for ultrafast lasers developed
Electrical engineers in Bochum, Germany, have succeeded in developing a new concept for ultrafast semiconductor lasers. The researchers make clever use of the intrinsic angular momentum of electrons, called spin, to successfully ...
Oct 28, 2011 |
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The rate of data transmission over plastic optical fibers can be increased by controlling modal dispersion
Plastic optical fibers offer a more efficient method of data transmission in telecommunications. While glass optical fibers allow very high data rates to be transmitted, they are expensive and difficult to ...
Oct 28, 2011 |
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