Slippage boosted spectral cleaning in a seeded free-electron laser
| Autor: | Taihe Lan, Lie Feng, Zhentang Zhao, Chao Feng, Haixiao Deng, Wenyan Zhang, Dong Wang, Junqiang Zhang, Xuan Li, Xiaoqing Liu, Meng Zhang, Xingtao Wang, Bo Liu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Materials science lcsh:Medicine Electron Radiation Article law.invention 03 medical and health sciences 0302 clinical medicine Optics law Free-electron lasers Harmonic number lcsh:Science Ultrafast lasers Multidisciplinary business.industry lcsh:R Free-electron laser Laser Wavelength 030104 developmental biology Extreme ultraviolet lcsh:Q business 030217 neurology & neurosurgery Coherence (physics) |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-7 (2019) |
| ISSN: | 2045-2322 |
| Popis: | The realization of fully coherent light sources at extreme ultraviolet to x-ray region has been a long-standing challenge for laser technologies. While modern single pass free-electron lasers (FELs) hold the ability to produce very intense x-ray radiation on few-femtosecond timescale, the output radiation pulses usually have noisy spectra and limited temporal coherence since the amplification starts from electron noise. A promising way for producing stable transform-limited pulses is based on the harmonic up-conversion techniques with a conventional laser as the seed. However, it is found that the insignificant phase error in the seed laser may be eventually multiplied by the harmonic number, leading to a degradation of the output temporal coherence at x-ray wavelength. Here, we report for the first time on the demonstration of a slippage boosted spectral cleaning technique to mitigate the impact of seed laser induced phase errors and to significantly improve the temporal coherence of a seeded FEL with large phase errors in the seed laser. Experimental results indicate the possibility of generating fully coherent x-ray radiation pulses with this technique. |
| Databáze: | OpenAIRE |
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