Title :
A compact Cherenkov laser with a Bragg cavity composed of dielectric gratings
Author :
Shiozawa, Toshiyuki ; Kamata, Hisashi
Author_Institution :
Inst. of Laser Eng., Osaka Univ., Japan
fDate :
10/1/1997 12:00:00 AM
Abstract :
The growth and saturation characteristics of a Cherenkov laser with a Bragg cavity composed of dielectric gratings are investigated in detail with the aid of numerical simulation based upon the fluid model of the electron beam, For the analysis of the problem, a two-dimensional (2-D) model of the Cherenkov laser is considered which consists of a planar relativistic electron beam and a parallel plate waveguide, one plate of which is loaded with a dielectric sheet. For confinement and extraction of the electromagnetic wave, a Bragg cavity is formed by dielectric gratings fabricated at both ends of a dielectric-loaded parallel plate waveguide. The result of numerical simulation shows that a compact Cherenkov laser, the longitudinal dimension of which is about one order of magnitude smaller than that of the corresponding single-pass Cherenkov laser, can be realized by using a Bragg cavity composed of dielectric gratings
Keywords :
Cherenkov radiation; dielectric-loaded waveguides; diffraction gratings; dispersion (wave); free electron lasers; laser cavity resonators; laser theory; millimetre wave lasers; numerical analysis; optical saturation; relativistic electron beam tubes; submillimetre wave lasers; waveguide lasers; Bragg cavity; compact Cherenkov laser; confinement; dielectric gratings; dielectric sheet; dielectric-loaded parallel plate waveguide; electromagnetic wave; electron beam; extraction; fluid model; growth characteristics; longitudinal dimension; numerical simulation; parallel plate waveguide; planar relativistic electron beam; saturation characteristics; short millimeter waves; single-pass Cherenkov laser; submillimeter waves; two-dimensional model; Bragg gratings; Dielectrics; Electromagnetic scattering; Electromagnetic waveguides; Electron beams; Laser modes; Numerical simulation; Planar waveguides; Two dimensional displays; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
