Optical propagation of the HE11 mode and Gaussian beams in hollow circular waveguides |
| |
Authors: | J P Crenn |
| |
Institution: | (1) Association Euratom-CEA sur la Fusion Contrôlée CE Cadarache, 13108 St Paul les Durance Cedex, France |
| |
Abstract: | The propagation of the HE11 mode and Gaussian beams in hollow oversized circular waveguides is analyzed using optical theories. Different types of waveguides are considered : hollow dielectric or conducting waveguides, dielectric-lined waveguides, corrugated waveguides. General formulas are derived which give the power transmission through these different guides. The best wall materials and structures are determined from a comparison of the waveguide transmissions, at the infrared and millimeter wavelengths. The question of the coupling between the HE11 mode and Gaussian beams is discussed and from a review of coupling coefficients derived before, an optimum value is pointed out. The problem of matching a Gaussian beam into circular waveguides in order to achieve the maximum power transmission is analyzed. These results are of interest for infrared lasers or waveguide applications and for Electron Cyclotron Wave (ECW) systems at the millimeter wavelength. |
| |
Keywords: | Gaussian beam HE11 mode Hollow dielectric waveguides Conducting waveguides Dielectric-lined waveguides Corrugated waveguides |
本文献已被 SpringerLink 等数据库收录! |