Ridged waveguides for ultra-broad-band light modulators
Abstract
The electromagnetic field of the dominant mode propagating in the inhomogeneously dielectrically loaded double ridged waveguide is given in terms of a modal series expansion. The numerical evaluation of the propagation constant reveals a remarkably linear dispersion diagram in close agreement with measurements performed in the 8-40 GHz range. Based on this analysis, the bandwidth of a ridged waveguide CO2-laser modulator is calculated to exceed 40 GHz, when a 25-mm long CdTe crystal is used as electrooptic material.
- Publication:
-
IEEE Transactions on Microwave Theory Techniques
- Pub Date:
- March 1982
- DOI:
- 10.1109/TMTT.1982.1131055
- Bibcode:
- 1982ITMTT..30..220M
- Keywords:
-
- Carbon Dioxide Lasers;
- Light Modulation;
- Microwave Frequencies;
- Modulators;
- Propagation Modes;
- Waveguide Lasers;
- Broadband;
- Electro-Optics;
- Electromagnetic Fields;
- Field Mode Theory;
- Infrared Lasers;
- Signal Mixing;
- Tunable Lasers;
- Lasers and Masers