Wave-Coupled Millimeter-Wave Electro-Optic Techniques
Abstract
This report details results on two antenna-coupled millimeter-wave electro-optic modulators, the slot-vee antenna-coupled modulator and a 94 GHz directional coupler modulator. The slot-vee-coupled modulator gave 0.17 m-squared per Watt semitivity, but known defects in the chip imply much better performance is possible. The 94 GHz directional coupler improvements anticipated were not realized due to fabrication problems. A detailed theoretical study of the effects of velocity mismatch on linearized electro-optic modulators was made and the results published. A key result was that directional-coupler based modulators were found to be significantly more easily degraded than some Mach-Zehnder-based modulators. An experimental study of bias drift in electro-optic modulators was made and protons were determined to be the cause. Several inventions were made to reduce or eliminate proton-caused bias drift.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2001
- Accession Number
- ADA389460
Entities
People
- Lee J. Burrows
- Uri V. Cummings
- William H. Bridges
Organizations
- California Institute of Technology