Helical distributed feedback free-electron laser

Journal Article · Mon Feb 05 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.102775· OSTI ID:6908760

Akiba, T; Tanaka, K; Mokuno, M; Miyamoto, S; Mima, K; Nakai, S ^[1]; Kuruma, S; Imasaki, K; Yamanaka, C ^[2]; Fukuda, M; Ohigashi, N ^[3]; Tsunawaki, Y ^[4]

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1. Institute of Laser Engineering, Osaka University, Yamada-oka 2-6, Suita, Osaka 565, Japan (JP)
2. Institute for Laser Technology, Osaka University Yamada-oka 2-6, Suita, Osaka 565, (Japan)
3. Faculty of Engineering, Kansai University, 3-3-35 Yamate-Chou, Suita, Osaka 564, (Japan)
4. Osaka Industrial University, Naka-gaito, Daito, Osaka 574, (Japan)

Results of the implementation of a distributed feedback (DFB) reflector in a free-electron laser (FEL) are described. The reflector was positioned in the interaction region of the FEL waveguide in order to produce narrow bandwidth features in the output spectrum. Both the DFB and wiggler were of helical configuration. The energy, current, and pulse width of the electron beam were 1.5 MeV, 100 A, and 50 ns. By employing the DFB structure the intensity of the two specific frequencies may be increased by factors of 3 and 5. These frequencies are in good agreement with those predicted by theory. Temporally radiation waveforms exhibit a double peak, revealing a sensitivity of the oscillation condition to beam energy.

• OSTI ID: 6908760
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:6; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
AMPLIFICATION
DESIGN
DISPERSION RELATIONS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FEEDBACK
FREE ELECTRON LASERS
GAIN
LASER CAVITIES
LASERS
MAGNETS
OPERATION
WAVEGUIDES
WIGGLER MAGNETS