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- Title
First lasing of an echo-enabled harmonic generation free-electron laser.
- Authors
Zhao, Z. T.; Wang, D.; Chen, J. H.; Chen, Z. H.; Deng, H. X.; Ding, J. G.; Feng, C.; Gu, Q.; Huang, M. M.; Lan, T. H.; Leng, Y. B.; Li, D. G.; Lin, G. Q.; Liu, B.; Prat, E.; Wang, X. T.; Wang, Z. S.; Ye, K. R.; Yu, L. Y.; Zhang, H. O.
- Abstract
Free-electron lasers have been successfully operated with ultrahigh brightness and excellent transverse coherence at X-ray wavelengths. One of the next goals for further improvements is full coherence. An obvious approach is to seed the free-electron laser interaction using a conventional source that has good temporal coherence. Here, we show the first lasing of a free-electron laser with an echo-enabled harmonic generation scheme, which shows great promise for producing coherent lasing at short wavelengths, even in the X-ray regime. The experiment was conducted at a test facility that combines a 135.4 MeV electron accelerator with an amplifier consisting of a series of undulator magnets. Lasing was achieved at the third harmonic of the seed with a gain of ?100,000 over spontaneous radiation. The measurements show typical exponential growth and excellent spectral characteristics, as well as good intensity stability.
- Subjects
LASERS; WAVELENGTHS; OPTOELECTRONIC devices; LIGHT sources; TESTING laboratories
- Publication
Nature Photonics, 2012, Vol 6, Issue 6, p360
- ISSN
1749-4885
- Publication type
Article
- DOI
10.1038/nphoton.2012.105