Using light to correct light has immediate applications for communications, imaging and sensing say researchers. Using light to correct light has immediate applications for communications, imaging and sensing say researchers.
Researchers from Italy and Wits have developed a novel technique for correcting the distortions that affect structured light.There is a way to make fibre-optic internet even better, but it’s unfortunately prone to failure. Using patterns in light beams, one could load even more information than we currently do into light-based communications.“These patterns, can, for instance, resemble shapes such as donuts and flower petals.
To do this, the team tested pairing a structured light beam with an unstructured light beam before being sent on its journey through a highly aberrated medium. This process is known as difference frequency generation and it produces one beam that shares the properties of the unstructured and structured beam when pushed through a nonlinear crystal.
“The output aberration is the difference of the two input aberrations, so that if they are the same then light can correct light with an output after the crystal that is aberration free,” says Forbes.
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