Echo-less light observed for first time—13 October 2015

Researchers from the ARC Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS) have been experimenting on creating special states of light that have no echoes. The team has developed a method which will allow waves of light, sound or radio to travel through complex scattering objects and have the entire wave arrive at once at its point of destination, i.e. echo-free. Dr Joel Carpenter said the waves of light are like yelling a message to a friend at the end of a tunnel. “Because of the way the sound waves bounce off walls and other objects the message your friend receives will be distorted by echoes and they might not be able to understand you…imagine you had a specially shaped horn or speaker that launches your voice into the tunnel in a very special shape so that somehow no echoes arrive at the other end. We’ve demonstrated the same idea, except using light bouncing around inside an optical fibre.” 

Media issued by the ARC Centre for Ultrahigh bandwidth Devices for Optical Systems

Image: Light travelling in an optical fibre
Image credit: Dr Joel Carpenter

Original Published Date: 
Tuesday, October 13, 2015