A free-electron laser (FEL) is a fourth generation light source producing extremely brilliant and short pulses of radiation.

Aug 19, 2025 · Unlike conventional lasers, the FEL produces tunable light (light that can be adjusted to different colors or energies) by accelerating electrons through alternating magnetic fields.

The free-electron laser has been developed over many years, starting from the first one built at Stanford by John Madey and his collaborators in the 1970s. It is a powerful and challenging combination of …

The free-electron laser (FEL) is defined as a type of laser that generates electromagnetic waves across a broad range of wavelengths, from microwave to ultraviolet, by utilizing the accelerated motion of …

Dec 29, 2025 · Free-electron lasers create coherent light by constantly accelerating a beam of electrons. Free-electron lasers are particularly useful because they can produce radiation with a...

Dec 23, 2025 · X-ray free-electron lasers (XFELs) have transformed the study of matter by delivering femtosecond and attosecond pulses at angstrom wavelengths, enabling direct observation of …

Oct 26, 2023 · The Free-Electron Laser (FEL) stands as a unique technology in the world of lasers and photonics, harnessing the power of free, unbound electrons to generate high-intensity …

As in a conventional laser, the photons are bounced between two mirrors and emitted as a coherent beam of light. The light can be tuned to precise colors or wavelengths because the electrons are …

Free-Electron Lasers (FELs) are tuneable sources of monochromatic synchrotron radiation. Compared to typical storage ring beamlines, the pulses have much higher peak power, higher brightness and …

Jul 29, 2025 · Researchers have built a compact X-ray free-electron laser (XFEL) using laser plasma accelerators to generate and sustain high-quality electron beams. XFELs have been transformative …