Navigation Links
Better lasers for optical communications
Date:4/12/2011

Long-distance, high speed communications depend on lasers. But when information is transmitted down fiber optic cables, it's critical that the signal be clear enough to be decoded at the other end. Two factors are important in this respect: the color of the light, otherwise known as the wavelength, and the orientation of the light wave, known as polarization. A team from EPFL and the Swiss Federal Laboratories for Materials Science and Technology (EMPA) has developed a technique that improves control over these two parameters.

"All indications are that this technology could be useful at both industrial and scientific levels," explains Eli Kapon, head of EPFL's Laboratory of Physics of Nanostructures. More than fifteen years of research were required to arrive at this result, work that "has caused many headaches and demanded significant investment."

To obtain the right wavelength, the EPFL researchers adapted the lasers' size. In parallel, the EMPA scientists designed a nanometer-scale grating for the emitter in order to control the light's polarization. They were able to achieve this feat by vaporizing long molecules containing gold atoms with a straw-like tool operating above the lasers. Using an electron microscope, they were able to arrange and attach gold particles to the surface of each laser with extreme precision. Thus deposited, the grating serves as a filter for polarizing the light, much like the lenses of sunglasses are used to polarize sunlight.

Industrial and scientific advantages

This technique, developed in collaboration with EMPA, has many advantages. It allows a high-speed throughput of several gigabits a second with reduced transmission errors. The lasers involved are energy-efficient, consuming up to ten times less than their traditional counterparts, thanks to their small size. The technique is very precise and efficient, due to the use of the electron microscope.

"This progress is very satisfying," adds Kapon, who also outlines some possible applications. "These kinds of lasers are also useful for studying and detecting gases using spectroscopic methods. We will thus make gains in precision by improving detector sensitivity."


'/>"/>

Contact: Prof. Eli Kapon
eli.kapon@epfl.ch
41-216-933-388
Ecole Polytechnique Fdrale de Lausanne
Source:Eurekalert

Related biology technology :

1. Magellan Biosciences and Miacom Diagnostics Team Up to Enable Faster, Easier Identification of Pathogens as Part of Magellans End-to-End Suite of Microbiology Products Designed to Streamline Lab Workflow and Enable Better Treatment Decisions
2. New transistors: An alternative to silicon and better than graphene
3. Reportlinker Adds Emerging Opportunities in Biosimilar and Biobetter Drugs Markets
4. TU scientists in Nature: Better control of building blocks for quantum computer
5. Better batteries from the bottom up
6. Smaller is better in the viscous zone
7. Light on silicon better than copper?
8. U of C scientist offers better ways to engineer Earths climate to prevent dangerous global warming
9. Generic Drug Sector Gets Better Information on API Manufacturing Costs from Thomson Reuters and Rondaxe Enterprises
10. Transformation optics make a U-turn for the better
11. For platinum catalysts, smaller may be better
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/8/2016)... , February 8, 2016 ... Private Limited, an innovation-driven oncology company developing next ... less toxic, today announced that chairman emeritus of ... invested in the company as part of the ... joining existing investors Navam Capital and Aarin Capital. ...
(Date:2/8/2016)... , ... February 08, 2016 , ... Information Management Services ... product. The upgrade represents a completely new technical foundation and is so significant ... a responsive design interface, significantly increased speed for search results, a streamlined layout and ...
(Date:2/8/2016)... Stockton has an active R&D program for the ... area, the Group has a unique research and development center ... in developing Bio Control products. Stockton ... parameters and regulatory guidelines, and is active in more than ... Stockton,s flagship product Timorex Gold ...
(Date:2/6/2016)... ... 06, 2016 , ... Contact:, Abby Mitchell, Communications Manager, Phone: ... Sponsors Teacher Training Program , Bite of Science Dinner Event to Strengthen Science ... in Education (CEE) will sponsor a Bite of Science professional enrichment session, cost-free, ...
Breaking Biology Technology:
(Date:2/1/2016)... 2016  Today, the first day of American Heart ... develop a first of its kind workplace health solution ... In the first application of Watson ... ), and Welltok will create a new offering that ... analytics, delivered on Welltok,s health optimization platform. The effort ...
(Date:1/28/2016)... Synaptics (NASDAQ: SYNA ), a leading developer of human interface ... 31, 2015. --> --> ... percent compared to the comparable quarter last year to $470.5 million. ... million, or $0.93 per diluted share. --> ... of fiscal 2016 grew 9 percent over the prior year period ...
(Date:1/25/2016)...   Unisys Corporation (NYSE: UIS ) today announced ... International Airport, New York City , to help ... to enter the United States using passports ... pilot testing of the system at Dulles last year. The ... during January 2016. --> pilot testing of the ...
Breaking Biology News(10 mins):