The interaction of high- and low-frequency waves in a free electron laser

Author

Latham, Peter E. ; Levush, Baruch

Author_Institution

Lab. for Plasma Res., Maryland Univ., College Park, MD, USA

Volume

18

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

472

Lastpage

481

Abstract

When a free electron laser (FEL) interaction occurs inside a waveguide, there are two possible operating frequencies at the two intersections of the beam line with the waveguide dispersion curve. Using a one-dimensional model valid for a low-gain oscillator, the mode competition between the high- and low-frequency waves is studied. It is found that the low-frequency wave can be nonlinearly suppressed, even when its linear growth rate is positive. When the frequency ratio is two, phase locking occurs and the nonlinear gain of the low-frequency wave can exceed its linear growth rate

Keywords

free electron lasers; laser mode locking; laser modes; masers; waveguides; free electron laser; high-frequency waves; interaction; linear growth rate; low-frequency wave; low-frequency waves; microwave generation; mode competition; nonlinear gain; one-dimensional model; phase locking; waveguide dispersion curve; Electron beams; Free electron lasers; Frequency; Laser beams; Laser mode locking; Laser modes; Oscillators; Plasma waves; Q factor; Waveguide lasers;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.55917

Filename

55917