Light Reading
Japanese researchers get breakthrough results for 10-Gbit/s lasers using NL Nanosemiconductor’s quantum dot wafers

Japanese Boost 10-Gig Lasers

Light Reading
News Wire Feed
Light Reading
9/30/2004
50%
50%

DORTMUND, Germany -- Breakthrough temperature stability results have been achieved by scientists at Fujitsu and The University of Tokyo from lasers based on quantum dot wafers grown by NL Nanosemiconductor GmbH (Dortmund, Germany), an advanced facility for nano-epitaxy wafers used in semiconductor lasers. The scientists have developed lasers that are capable of maintaining stable optical power output over a wide temperature range at a speed of 10 Gbps. Such devices would enable the creation of optical transceivers which are smaller, cheaper and consume less power than current devices according to Juergen Kurb, CEO of NL Nanosemiconductor.

The laser was developed by a team led by Professor Yasuhiko Arakawa, Director of the Nanoelectronics Collaborative Research Center at The University of Tokyo, and member of the Scientific Advisory Board (SAB) of NL Nanosemiconductor. Details of the results were presented in a paper at the European Conference and Exhibition on Optical Communication 2004 (ECOC) which took place in Stockholm from Sept. 5 to 9. Professor Arakawa had theorized back in 1982 that the operation of quantum dot lasers does not rely on temperature. Since then, prominent researchers including all members of the NL Nanosemiconductor SAB have been perusing a way to demonstrate the superior temperature performance of QD lasers.

Using p-type doped quantum dot lasers, the temperature independent operation was demonstrated between 20°C and 70°C at a wavelength of 1.3 um with an extinction ration of 7dB and for the first time at a speed of 10 Gbps, a typical rate used in today’s LAN / MAN optical backbones. The goal of Arakawa's team is to productize a laser by 2007 which is smaller, operates at lower power and is less expensive than present devices.

"The performance of these quantum dot lasers are far superior to that of conventional quantum well lasers. They exhibit a To of 420°K at room temperature while maintaining a clear eye opening – in other words, they have outstanding temperature insensitivity and at such high speeds." stated Professor Arakawa.

Typically, the threshold current of lasers and efficiency are sensitive to the operating temperature so it is necessary to adjust the bias and modulation currents in order to obtain a good modulated light output waveform. "The benefits are significant - by not requiring TECs (thermo-electric coolers) or having to adjust the bias and modulation currents using complex external circuitry, these lasers will open the way for higher performance and lower cost transceivers" said Alexey Kovsh, CTO of NL Nanosemiconductor, adding "In addition to temperature stability, the reduced optical feedback sensitivity of quantum dot lasers eliminates the need for an expensive optical isolator allowing further savings."

The laser developed by Arakawa's team uses quantum dot technology which has been researched over the past ten years under the direction of Prof. Zh. Alferov, the Nobel Prize winning Head of the Abraham Ioffe Institute (St. Petersburg, Russia), where NL Nanosemiconductor’s technical team hail from. "It is quite gratifying to see yet further confirmation of the benefits which quantum dot technology brings to the commercial world" said Nobel Laureate Prof Zh. Alferov, adding "I expect further breakthroughs with quantum dots such as this which will revolutionize the field of semiconductor lasers."

Nanosemiconductor GmbH

(2)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View
o-man
50%
50%
o-man,
User Rank: Light Beer
12/5/2012 | 1:13:52 AM
re: Japanese Boost 10-Gig Lasers
How can anyone measure how good a school is?

Maybe if people look at successful former students...

I know that you would not have to go far from the Abraham school to find a much better school. Maybe even in the same CITY!
Balet
50%
50%
Balet,
User Rank: Light Beer
12/5/2012 | 1:13:52 AM
re: Japanese Boost 10-Gig Lasers
Noone ever called Ioffe Physical technical institute (one of the best reasearch centers in Russia) Abraham Ioffe Institute.

It's like spitting in the face of thousands russian scientists.
Flash Poll
Wagner’s Ring
Data Centers Drive Telcos Into the Future

8|28|14   |   2:20   |   (2) comments


Data centers are at the heart of key trends driving telecom -- network virtualization, the drive for increased agility, and the need to compete with OTT providers.
LRTV Custom TV
Why SPs Should Consider Cisco's EPN

8|27|14   |   5:40   |   (0) comments


Sultan Dawood from Cisco discusses Cisco's EPN, which enables SPs to build agile and programmable networks delivering new network virtualized services using Cisco's Evolved Services Platform (ESP).
LRTV Huawei Video Resource Center
Huawei’s Showcase @ Big Telecom Event 2014

8|26|14   |   2.56   |   (0) comments


SoftCOM is Huawei's framework for telecom business and network transformation. Haofei Liu, Solution Marketing Manager, Carrier Business Group, Huawei, showcases Huawei's SoftCOM architecture in this video.
LRTV Huawei Video Resource Center
Huawei @ BTE 2014: Director of Integrated Solutions on SoftCOM & NFV Monetization

8|26|14   |   4.43   |   (0) comments


Libin Dai, Director of Integrated Solutions, Carrier Business Group, discusses Huawei's SoftCOM and NFV monetization. Huawei believes that NFV monetization should be service-driven rather than network-driven, and that operators should have network transformation, service transformation and a compatible and collaborative ecosystem in place in order to deploy NFV.
LRTV Huawei Video Resource Center
Huawei @ BTE 2014: Director of US NFV Lab on CloudEdge & the Future of NFV

8|26|14   |   4.06   |   (0) comments


Sean Chen, Director of US NFV Lab at Huawei, discusses Huawei's new approach to NFV in open collaboration. Huawei believes that through Proof of Concept tests, it could help operators learn and communicate with the industry more effectively. Sean believes that successful implementation of NFV should have its values reaching to end users and discusses how Huawei's ...
LRTV Huawei Video Resource Center
Huawei's Highlights @ Big Telecom Event 2014

8|26|14   |   3.34   |   (0) comments


At the Big Telecom Event in Chicago Huawei showcases its high-level strategy, the SoftCOM architecture, which helps operators reduce the cost of ownership of their network infrastructure and generate additional revenue in the ICT service environment. Huawei showcases over 30 pilot programs from across the globe, focusing on the industry-leading commercial ...
LRTV Custom TV
VeEX – Live from the Show

8|21|14   |   5:58   |   (0) comments


An overview of VeEX Test and Measurement solutions including TX300S multi-service test set with VeExpress cloud-based management system, UX400 universal modular platform supporting 100G testing, and the redesigned RXT modular platform.
LRTV Custom TV
Transitioning CE 2.0 Networks Into the SDN & NFV Era With Telco Systems

8|19|14   |   5:19   |   (0) comments


Telco Systems' Ariel Efrati (CEO) and Moshe Shimon (VP of Product Management) discuss virtualization and how the company's new Open Metro Edge solution utilizes the SDN and NFV concepts to accelerate and orchestrate service delivery through its innovative product portfolio and software applications.
LRTV Custom TV
NFV Myths: Is NFV Still Several Years Away?

8|11|14   |   1:13   |   (0) comments


Some say that NFV (network functions virtualization) is still several years away from being implemented on mobile operator networks. This isn't the case. Operators can get started on their paths to NFV now, as this short video from Skyfire shows.
LRTV Custom TV
A New Security Paradigm in SDN/NFV

7|28|14   |   02:54   |   (0) comments


Paul Shaneck, Global Director Network Solutions for Symantec, discusses the evolving virtualized network, explaining how Symantec is leading the security discussion as it relates to SDN and NFV, and helping to ensure the network is protected and compliant.
LRTV Documentaries
Sprint's Network Evolution

7|24|14   |   14:59   |   (0) comments


Sprint's Jay Bluhm gives a keynote speech at the Big Telecom Event (BTE) about Sprint's network and services evolution strategy, including Spark.
LRTV Documentaries
BTE Keynote: The Software-Defined Operator

7|24|14   |   18:43   |   (1) comment


Deutsche Telekom's Axel Clauberg explains the concept of the software-defined operator to the Big Telecom Event (BTE) crowd.
Upcoming Live Events!!
September 16, 2014, Santa Clara, CA
September 16, 2014, Santa Clara, CA
September 23, 2014, Denver, CO
October 29, 2014, New York City
November 6, 2014, Santa Clara
November 11, 2014, Atlanta, GA
December 9-10, 2014, Reykjavik, Iceland
June 9-10, 2015, Chicago, IL
Infographics
A survey conducted by Vasona Networks suggests that 72% of mobile users expect good performance all the time, and they'll blame the network operator when it's not up to par.
Today's Cartoon
Hot Topics
Rogers, Shaw Take Aim at Netflix
Mari Silbey, Independent Technology Editor, 8/26/2014
Utilities to Pump $11.2B Into Smart Grid – Study
Jason Meyers, Senior Editor, Utility Communications/IoT, 8/26/2014
Verizon Launches QR Code Security Solution
Carol Wilson, Editor-at-large, 8/26/2014
Nokia's Maps Land on Samsung Devices
Sarah Reedy, Senior Editor, 8/29/2014
Verizon to Launch HD VoLTE in 'Coming Weeks'
Sarah Reedy, Senior Editor, 8/26/2014
Like Us on Facebook
Twitter Feed