Velocity Matched Optical Transmitter
Abstract
This report covers work towards development of a 50 GHz optical modulator. The H-guide configuration of the lithium niobate based modulator, along with the desire to reduce the modulation voltage, necessitated substrate dimensions of 1 cm x 120 micron x 25 micron. These dimensions were not obtainable. Polishing even below 25 micron to reduce the modulation voltage proved unsuccessful. Obtaining the 120 micron dimension after obtaining the 25 micron dimension was also not obtainable. A new material for the structure is required which does not need mechanical processing to obtain the desired dimensions. This is the indicated path to pursue for obtaining a velocity matched modulator. Additionally, data is presented on V-shaped microcracks observed in titanium diffused lithium niobate presumed due to the heavy titanium indiffusion. Microcrack production leads to increased scattering and premature electrical breakdown. Material is also presented on a computer aided design tool for optical waveguide devices.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1989
- Accession Number
- ADA217413
Entities
People
- Pao L. Liu
Organizations
- University at Buffalo