Wide band free electron laser with variable phase and frequency

Patent · Tue Apr 04 04:00:00 EDT 1989

OSTI ID:5885573

Harvey, R J

A variable free electron laser is described, comprising: first and second free electron laser cavity sections coupled in series by a flow transition region for electrons to flow from the first to the second cavity section, the first cavity section receiving an applied electron beam and the second cavity section receiving bunched electrons from the first cavity section and emitting output radiation in response thereto, each cavity section including a wiggler means for coherently bunching electrons flowing through the cavity section; successive pairs of electrodes in the flow transition region spaced in the direction of electron flow; and means for applying variable voltage differentials across the electrodes which accelerate the electrons between one electrode pair and decelerate the electrons by a substantially equal amount between another electrode pair, whereby the phase of the generated radiation field is varied. A second variable free electron laser is also described. It employs electromagnets to vary electron beam phase.

• Assignee: Hughes Aircraft Co., Los Angeles, CA
• Patent Number(s): US 4819238
• OSTI ID: 5885573
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
BEAMS
CONTROL
DESIGN
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELECTRON BEAMS
EQUIPMENT
FREE ELECTRON LASERS
FREQUENCY CONTROL
LASER CAVITIES
LASERS
LEPTON BEAMS
MAGNETS
MODE CONTROL
PARTICLE BEAMS