Accession Number : ADD012936

Title :   Methods for Tuning Free Electron Lasers to Multiple Wavelengths.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Colson,William B

Report Date : 16 Jun 1987

Pagination or Media Count : 6

Abstract : 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 laser's output is tuned to different wavelengths. By using higher harmonics (f=3,5,7,...) the free electron laser produces lasing in several wavelengths simultaneously. These several wavelengths are also tuned by the tilting resonator. (Patents).

Descriptors :   *PATENTS, *FREE ELECTRON LASERS, *TUNING, *ELECTRON BEAMS, *RESONATORS, COHERENT OPTICAL RADIATION, ELECTRONS, FREQUENCY, HARMONICS, MAGNETIC FIELDS, OUTPUT, POLARIZATION, TILT, TRANSVERSE, TRAVEL

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE