External waveguide modulator
Abstract
Electro-optical phase and intensity modulators were produced and tested. Waveguide modulators and switches for intensity modulation based on the Mach-Zehnder and the directional-coupler principles were made. The fabrication of single-mode Ti-indiffused strip waveguides in Li NbO3 as well as measurements of their near-field intensity distribution and insertion loss are described. The electrical properties of the electrode structure and its influence on the modulator performance were investigated. The theory of phase and intensity modulation is presented. A 3dB modulation bandwidth of about 1.1 GHz is obtained for interference-waveguide modulators based on the Mach-Zehnder principle.
- Publication:
-
Final Report Siemens A.G
- Pub Date:
- November 1980
- Bibcode:
- 1980siem.reptR....A
- Keywords:
-
- Amplitude Modulation;
- Optical Waveguides;
- Phase Modulation;
- Couplers;
- Electro-Optical Effect;
- Helium-Neon Lasers;
- Mach-Zehnder Interferometers;
- Electronics and Electrical Engineering