Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


NTT develops a current-injection laser with ultralow power consumption

Nippon Telegraph and Telephone Corporation (NTT) announced that they have developed a current-injection photonic-crystal laser with ultralow power consumption, which can be applicable to both off-chip and on-chip optical data transmission for microprocessors.
Explosive diffusion of broadband services such as FTTH and smartphones are expected to lead to network traffic 200 times increase and the total power consumed by ICT-related equipments 5 times during the coming 20 years. NTT laboratories have focused on finding a radical solution to reduce the power consumption of microprocessors (MPU), since MPUs consume most of the power in ICT-related equipments.

NTT Laboratories have developed a lamda (wavelength)-scale embedded active region photonic- crystal (LEAP) laser, in which a wavelength-scale InGaAsP-based active region is embedded in an InP based photonic-crystal (PhC) waveguide. This LEAP laser achieved the world's first continuous-wave operation of a current-injection-photonic crystal laser at room temperature (25-30°C).
An ultralow effective operating current of 10 ìA was realized and the output power of 1.8 ìW was obtained at the current level of 2.0 mA. NTT claims that this result was obtained by a unique structural feature of the present LEAP laser, where the current injection is performed by lateral pin junctions into the active region.

NTT seems to consider that the operating characteristics of the fabricated LEAP laser is an answer to the request of future optical interconnects in CMOS MPUs presented in International Technology Roadmap 2007 ITRS (

Administrator Account | Research asia research news
Further information:

More articles from Power and Electrical Engineering:

nachricht Steering a fusion plasma toward stability
28.10.2016 | American Physical Society

nachricht Solid progress in carbon capture
27.10.2016 | King Abdullah University of Science & Technology (KAUST)

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel light sources made of 2D materials

Physicists from the University of Würzburg have designed a light source that emits photon pairs. Two-photon sources are particularly well suited for tap-proof data encryption. The experiment's key ingredients: a semiconductor crystal and some sticky tape.

So-called monolayers are at the heart of the research activities. These "super materials" (as the prestigious science magazine "Nature" puts it) have been...

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Steering a fusion plasma toward stability

28.10.2016 | Power and Electrical Engineering

Bioluminescent sensor causes brain cells to glow in the dark

28.10.2016 | Life Sciences

Activation of 2 genes linked to development of atherosclerosis

28.10.2016 | Life Sciences

More VideoLinks >>>