scholarly journals Undulators for Short Pulse X-Ray Self-Amplified Spontaneous Emission-Free Electron Lasers

10.5772/64439 ◽  
2016 ◽  
Author(s):  
K. Zhukovsky
Keyword(s):  
Spontaneous Emission ◽  
Free Electron ◽  
Short Pulse ◽  
Amplified Spontaneous Emission ◽  
Free Electron Lasers ◽  
X Ray

scholarly journals A Review of High-Gain Free-Electron Laser Theory

Atoms ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 28
Author(s):  
Nicola Piovella ◽  
Luca Volpe
Keyword(s):  
Spontaneous Emission ◽  
Free Electron ◽  
Free Electron Laser ◽  
Amplified Spontaneous Emission ◽  
High Gain ◽  
Free Electron Lasers ◽  
Undulator Radiation ◽  
Laser Theory ◽  
X Ray ◽  
Single Pass

High-gain free-electron lasers, conceived in the 1980s, are nowadays the only bright sources of coherent X-ray radiation available. In this article, we review the theory developed by R. Bonifacio and coworkers, who have been some of the first scientists envisaging its operation as a single-pass amplifier starting from incoherent undulator radiation, in the so called self-amplified spontaneous emission (SASE) regime. We review the FEL theory, discussing how the FEL parameters emerge from it, which are fundamental for describing, designing and understanding all FEL experiments in the high-gain, single-pass operation.

scholarly journals The output of a laser amplifier with simultaneous amplified spontaneous emission and an injected seed

2009 ◽  
Vol 27 (3) ◽  
pp. 393-398 ◽  
Author(s):  
H. Huang ◽  
G.J. Tallents
Keyword(s):  
Spontaneous Emission ◽  
Extreme Ultraviolet ◽  
Amplified Spontaneous Emission ◽  
Gain Saturation ◽  
Free Electron Lasers ◽  
Laser Amplifier ◽  
One Dimensional ◽  
X Ray ◽  
Laser Amplifiers ◽  
Harmonic Radiation

AbstractThe minimum irradiance needed to overcome amplified spontaneous emission (ASE) of a seed beam injected into a laser amplifier is evaluated. The treatment is particularly applicable to extreme ultraviolet (EUV) and X-ray laser schemes to inject laser harmonic radiation as a seed into (1) plasma laser amplifiers and (2) free-electron lasers. Simple expressions and calculations are given for the minimum injected irradiance required for amplification of the injected seed beam to exceed ASE from the amplifier, including the effects of gain saturation, assuming one dimensional radiative transfer.

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