Advanced Modulator II
Abstract
The objective of this program was to conduct exploratory development of a 1 Gbps single-pass single-unit (unmultiplexed) modulator for use with a mode-locked and frequency-doubled neodymium YAG laser in a space laser communication system. The exploratory effort was directed toward the investigation and solution of problems for Pulse Gated Binary Modulation (PGBM) modulator operation. The modulator was to operate at data rates up to 1 Gbps and be able to handle 0.53 micrometer laser power up to 0.25 watts while maintaining its specified operating characteristics. The performance goals were (1) a static extinction ratio of 100 to 1 or greater, (2) a worst case dynamic extinction ratio of 30 to 1 or greater with a 1 Gbps pseudorandom code input, and (3) a static optical transmission of at least 80%. This effort was to develop the Gbps 0.53 micrometer modulator and provide a driver in breadboard form to be used as a laboratory tool to demonstrate the feasibility of the 1 Gbps modulator design concept. Several breadboard modulator-driver combinations were fabricated and evaluated. No hardware delivery was required. The four modulator units developed and evaluated under this program used the baseband and digital Pulse Gated Binary Modulation (PGBM) format.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 16, 1974
- Accession Number
- AD0922519
Entities
People
- J. R. Teague
- L. B. Allen
Organizations
- McDonnell Douglas