Title :
Study of Raman free-electron laser oscillator with Bragg reflection resonators
Author :
Chen, Jizhong ; Ming Chang Wang ; Wang, Ming Chang ; Lu, Zaitong ; Zhang, Lifen ; Feng, Bibo
Author_Institution :
Shanghai Inst. of Opt. Fine Mech., Acad. Sinica, China
fDate :
3/1/1991 12:00:00 AM
Abstract :
A high-gain Raman free-electron laser oscillator is realized by using a Bragg reflection resonator with a limited pulse duration of the electron beam (0.4 MeV/800 A. 60 ns). The practical design of the Bragg reflectors is introduced. A concept of hybrid oscillator configuration which combines the high gain of a superradiant amplifier with the narrow bandwidth of a conventional oscillator (Fabry-Perot resonator) is put forward and is confirmed by experimental results. It shows that 14 MW peak power at 7.7 mm wavelength (bandwidth Δλ/λ<5%) with a 4.4% electronic efficiency is produced. The measured fundamental wavelength of the radiation spectrum is compared with the result of calculations
Keywords :
Raman lasers; free electron lasers; laser cavity resonators; 14 MW; 4.4 percent; 7.7 mm; Bragg reflection resonator; calculations; electron beam; electronic efficiency; fundamental wavelength; high-gain Raman free-electron laser oscillator; hybrid oscillator configuration; limited pulse duration; narrow bandwidth; peak power; radiation spectrum; superradiant amplifier; Electron beams; Fabry-Perot; Free electron lasers; High power amplifiers; Optical amplifiers; Optical reflection; Oscillators; Plasma accelerators; Pulse amplifiers; Undulators;
Journal_Title :
Quantum Electronics, IEEE Journal of
