The most powerful laser in the world has been launched in South Korea. Free Technical Library News

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South Korea launches world's most powerful laser

14.05.2021

South Korean scientists have created the most powerful laser machine in the world. The intensity of the pulses of the installation is equal to all the light of the Sun falling on the Earth, focused into a beam with a diameter of 10 microns. The colossal energy of pulses on a micrometer target will make it possible to set up experiments that will help to penetrate into the essence of the interaction of light and matter, which will open the way for new directions in fundamental physics. Scientific discoveries will flow like water.

For many years in a row, the most powerful pulsed laser was the installation in the USA - the HERCULES titanium-sapphire laser at the University of Michigan. At its peak, "Hercules" developed 10 ^ 22 watts per cm2. Researchers at the Center for Relativistic Laser Science of South Korea (CoReLS) were able to surpass this achievement by an order of magnitude and reported the creation of a pulsed laser with a power of 10^23 W per cm2.

The pulse duration of such lasers is very, very small - only a few femtoseconds, and the target dimensions are 50 times smaller than the diameter of a human hair and are 1,1 microns.

To achieve the record intensity, it was necessary to complicate the optical focusing system to the limit and control the wave front of the pulses very accurately. For example, the so-called deforming mirrors were used as mirrors, which compensated for the slightest distortions during pulse focusing.

"This high-intensity laser will allow us to study astrophysical phenomena such as electron-photon and photon-photon scattering in the laboratory," said Chang Hee Nam, director of CoReLS and professor at the Gwangju Institute of Science and Technology. "We can use it for experimental testing and access to theoretical ideas, some of which were first proposed almost a century ago."

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