Dielectric waveguide-type millimeter-wave modulator using photoconductivity
Abstract
The theoretical and experimental study of the optical control of millimeter-wave propagation in a dielectric waveguide is discussed. A slab waveguide of simple structure is used in order to test the basic principles. A new waveguide configuration providing the greatest possible attenuation for a given light intensity so as to achieve high-speed modulation is proposed. Numerical results on the variation of the attenuation constant of millimeter waves for various waveguides dimensions and dielectric constants are presented. It is demonstrated that the waveguide may be used as a mode filter. The modulator and mode filter are fabricated with Si and SiO2 or Teflon and tested at 50 GHz. It is found that the millimeter waves can be modulated at frequencies, up to about 100 kHz.
- Publication:
-
Electronics Communications of Japan
- Pub Date:
- January 1985
- Bibcode:
- 1985JElCo..68...73O
- Keywords:
-
- Dielectrics;
- Light Emitting Diodes;
- Millimeter Waves;
- Optical Waveguides;
- Photoconductivity;
- Semiconductor Plasmas;
- Velocity Modulation;
- Dielectric Properties;
- Energy Gaps (Solid State);
- Plasma Density;
- Rectangular Waveguides;
- Transmission Lines;
- Electronics and Electrical Engineering