Featured Research

from universities, journals, and other organizations

Advance made in light-slowing techniques

Date:
January 18, 2012
Source:
Asociación RUVID
Summary:
Scientists have made a significant advance in the field of light-slowing techniques applied to microwave photonics, which open the door to integrating multiple functionalities into optical chips in the short and medium term.

In a recent issue of the journal Nature Photonics, researchers from the Universitat Politècnica de València report on the most significant advances worldwide in the field of light-slowing techniques applied to microwave photonics, which open the door to integrating multiple functionalities into optical chips in the short and medium term, and also to marketing these functionalities.

The article, written by José Capmany, Salvador Sales and Gasulla Ivana, from the optical and quantum communications group of the UPV's ITEAM institute, is included in the section "Technology Focus." It summarizes the work done in recent years by researchers from the UPV and other research centres within the European project GOSPEL, which aims at "governing the speed of light," using "innovative and pioneering" technologies.

Professor José Capmany, the head of the UPV's ITEAM, explains that the possibilities that will arise in the telecommunications field if we can control the speed of light are really broad: "we will be able to make very versatile processors with a high bandwidth, to efficiently interconnect systems using optical fibres as a transmission medium, and, generally speaking, to improve performance in other fields of application, such as sensor development, the processing of high-resolution images for biomedical and space sector applications, and the manufacturing of high-precision parts."

Within the GOSPEL project, researchers from the UPV's ITEAM are working towards an efficient phase shifter that can be transferred to the industry, based on light slowing in semiconductors and optical fibres. About a year and a half ago, Professor José Capmany's team, in collaboration with the Technical University of Denmark, achieved a world record in the telecommunications field by developing the first complete phase shifter with record bandwidth (50 GHz). It was a pioneering device for slowing down the pace and speed of light, thus improving the information transmission flow, avoiding congestion and ensuring optimum performance of the entire communication system.

In August this year, UPV researchers presented the first broadband radio frequency (RF) photonic phase shifter which is tunable and based on a single semiconductor element. Its advantages are that producing it will be cheaper and that it will provide a saving in energy consumption of up to 80%.

Future applications: biomedical imaging and quantum communications

According to the ITEAM researchers, although initially the microwave photonics field focused on applications closely related to telecommunications for defence, in recent years it is becoming increasingly oriented towards the civilian sector. In particular, an area of ​​activity which arouses much interest is that of high bandwidth (1-2 Gbit/s) wireless access networks, in which optical fibre is combined with pico- and femtocells providing coverage. "These cells use antennas with a very low power consumption, which favours the deployment of telecommunication networks that are greener than current macrocell-based networks. High-speed information transmission through pico- and femtocells requires using a millimetre frequency band (60-100 GHz). And it indispensably requires using optical fibres, as a transmission medium to the antenna with a very low loss," says José Capmany.

Among the emerging applications in which microwave photonics is to play an important role are biomedical imaging systems using optically generated waves in the terahertz band. "These waves can be used to examine samples and tissues without causing the damage that, for instance, X-rays cause; besides, they are able to find out more sophisticated information about processes involving molecules, radicals and ions," José Capmany points out.

Another field of application is the so-called "Internet of things," in which a global network connects physical objects with virtual objects through the combination of data capture techniques and communication networks. An instance of this may be radio frequency identification (RFID) sensor networks.

Looking farther into the future, Capmany highlights the applications of microwave photonics in communications and quantum logic, "a field in which very promising advances are being made."


Story Source:

The above story is based on materials provided by Asociación RUVID. Note: Materials may be edited for content and length.


Journal Reference:

  1. José Capmany, Ivana Gasulla, Salvador Sales. Microwave photonics: Harnessing slow light. Nature Photonics, 2011; 5 (12): 731 DOI: 10.1038/nphoton.2011.290

Cite This Page:

Asociación RUVID. "Advance made in light-slowing techniques." ScienceDaily. ScienceDaily, 18 January 2012. <www.sciencedaily.com/releases/2011/12/111221105641.htm>.
Asociación RUVID. (2012, January 18). Advance made in light-slowing techniques. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2011/12/111221105641.htm
Asociación RUVID. "Advance made in light-slowing techniques." ScienceDaily. www.sciencedaily.com/releases/2011/12/111221105641.htm (accessed July 24, 2014).

Share This




More Matter & Energy News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) — Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) — When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
Powered by NewsLook.com
Robot Parking Valet Creates Stress-Free Travel

Robot Parking Valet Creates Stress-Free Travel

AP (July 23, 2014) — 'Ray' the robotic parking valet at Dusseldorf Airport in Germany lets travelers to avoid the hassle of finding a parking spot before heading to the check-in desk. (July 23) Video provided by AP
Powered by NewsLook.com
Boeing Ups Outlook on 52% Profit Jump

Boeing Ups Outlook on 52% Profit Jump

Reuters - Business Video Online (July 23, 2014) — Commercial aircraft deliveries rose seven percent at Boeing, prompting the aerospace company to boost full-year profit guidance- though quarterly revenues missed analyst estimates. Bobbi Rebell reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins