Gaussian-beam open resonator with highly reflective circular coupling regions

Author

Matsui, Toshiaki ; Araki, Ken´ichi ; Kiyokawa, Masahiro

Author_Institution

Commun. Res. Lab., Minist. of Posts & Telecommun., Tokyo, Japan

Volume

41

Issue

10

fYear

1993

fDate

10/1/1993 12:00:00 AM

Firstpage

1710

Lastpage

1714

Abstract

A high-Q open resonator with quasi-optical coupling regions is described. The resonator consists of a pair of spherical mirrors, on each of which a highly reflective, partially transparent circular region is fabricated with a diameter larger than several wavelengths. The signal is coupled in and out as a Gaussian beam by means of these regions. Both very weak coupling and very efficient mode conversion are simultaneously achieved. This results in a Q-factor over 2×10⁵ and a high signal-to-noise ratio at 105.9 GHz. The Q-factor of the open resonator can be varied by rotating the output mirror to change the angle between the directions of the conducting stripes on the two mirrors

Keywords

Q-factor; mirrors; resonators; submillimetre wave devices; 105.9 GHz; Gaussian-beam open resonator; Q-factor; circular coupling regions; conducting stripes; high-Q open resonator; mode conversion; output mirror; partially transparent circular region; quasi-optical coupling regions; signal-to-noise ratio; spherical mirrors; weak coupling; Apertures; Diffraction; Electromagnetic coupling; Electromagnetic waveguides; Gaussian processes; Millimeter wave measurements; Millimeter wave technology; Mirrors; Optical coupling; Q factor;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.247915

Filename

247915