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A free-electron laser (FEL) is a fourth generation light source producing extremely brilliant and short pulses of radiation. An FEL functions much as a laser but employs relativistic electrons as a gain medium instead of using stimulated emission from atomic or molecular excitations.
Free-electron laser: A broad wavelength range (0.1 nm - several mm); a single FEL may be tunable over a wavelength range Relativistic electron beam: Atmospheric research, material science, medical applications. CO₂ gas dynamic laser: Several lines around 10.5 μm; other frequencies may be possible with different gas mixtures
In addition to the accelerator, the laboratory has housed and continues to house a free-electron laser (FEL) instrument. The construction of the FEL started June 11, 1996. It achieved first light on June 17, 1998. Since then, the FEL has been upgraded numerous times, increasing its power and capabilities substantially.
Self-amplified spontaneous emission (SASE) is a process within a free-electron laser (FEL) by which a laser beam is created from a high-energy electron beam. [1] [2] The SASE process starts with an electron bunch being injected into an undulator, with a velocity close to the speed of light and a uniform density distribution within the bunch.
The free-electron laser FELIX at the FOM Institute for Plasma Physics Rijnhuizen, Nieuwegein. Free-electron lasers (FEL) generate coherent, high-power radiation that is widely tunable, currently ranging in wavelength from microwaves through terahertz radiation and infrared to the visible spectrum, to soft X-rays. They have the widest frequency ...
The SPring-8 Angstrom Compact free electron LAser, referred to as SACLA (pronounced さくら (Sa-Ku-Ra)), is an X-ray free-electron laser (XFEL) in Harima Science Garden City, Japan, embedded in the SPring-8 accelerator and synchrotron complex. [1] [2] When it first came into operation 2011, it was the second XFEL in the world and the first in ...
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Mode locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10 −12 s) or femtoseconds (10 −15 s). A laser operated in this way is sometimes referred to as a femtosecond laser, for example, in modern refractive surgery.