McMaster University

Purpose

The optical transmitter is a critically important component in optical satellite communications, which includes a high-power high-bit-rate laser, a telescope, and a driving circuit. The current satellite communication based on visible and near-infrared (NIR) light does not work for all-weather (such as fog, rain and snow). Optical satellite communication at mid-IR atmospheric windows (3-5 mm and 8-12 mm) is essential for practical all-weather networks since absorption is much smaller for wavelengths in mid-IR atmospheric windows than for visible and NIR wavelengths. Unfortunately, mid-IR lasers with high optical power and high bit rate are not available on the market. In this project, mid-IR transmitters suitable for all-weather optical satellite communications will be developed. The developed mid-IR transmitters will be tested under various weather conditions. System performance of the developed mid-IR transmitters will be tested and radiation hardness testing and real world (space) implementation will be conducted.