Methods for Tuning Free Electron Lasers to Multiple Wavelengths.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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The tuning of the output of a free electron laser to different wavelengths is accomplished using a tilting resonator. In a free electron laser, relativistic electrons travel through a periodic magentic field and oscillate to amplify coherent optical radiation within a resonator with same polarization as the magnet. Usually, the electron beam is parallel with the resonator axis and the fundamental harmonic is ordinarily used in the transverse magnetic field. By tilting the resonator axis with respect to the electron beam and transverse magnetic field, the free electron lasers output is tuned to different wavelengths. By using higher harmonics f3,5,7,... the free electron laser produces lasing in several wavelengths simultaneously. These several wavelengths are also tuned by the tilting resonator. Patents.
- Atomic and Molecular Physics and Spectroscopy
- Particle Accelerators