Lasers used to redirect lightning bolts

Lightning bolts have been redirected using lasers for the first time, a method which could be used to create more advanced lightning protection systems.

Instruments to redirect lightning bolts, such as lightning rods, have existed for many years but a European consortium led by the Laboratoire d’Optique Appliquée has now achieved the same effect with a newly developed 'Laser Lightning Rod'

After months of firing powerful lasers into thunderstorms, the team finally saw success and managed to redirect four lightning strikes. To understand how we first need to understand how lightning forms.

By firing lasers into thunderstorms, a predetermined path is created for the electrical discharge. Filaments of intense light within the laser beam ionize the air.

When this happens a chain of plasma is created which helps to conduct electricity. Theoretically any electrical discharge, lightning, should follow this path.

Of the four lightning strikes redirected, one, on the Swiss Säntis mountain was tracked following the laser for around 200 feet.

It is thought that more powerful lasers could create longer paths for strikes to follow. The development could show a future away from lightning rods which can only protect an area of a few feet.

Their use will need to be regulated as the lasers are strong enough to disrupt passing air traffic, and the current cost is significantly higher than a traditional rod.

Work continues on the Laser Lightning Rod. It is already capable of succeeding even with poor weather and fog, the team now hopes to increase the distance at which it can direct lightning.