Results From Proof-Of-Concept Time-Based Communications Testing
Abstract
This paper presents the results of the time-based communications testing performed at Lincoln Labs (MIT/LL) using an Optical Two-Way Time Transfer Communications System. A short explanation of system design and two-way time transfer implementation in a communications channel will be followed by a presentation of data sets from the Lincoln Laboratory testing. Time transfer measurement data will be presented from tests conducted from within the laboratory, as well as tests conducted over long-distance, outdoor links. The laboratory measurements to be presented include two-way time transfer results over fiber in a controlled (constant temperature) environment with typical communications hardware inserted in the link between clocks. The hardware used for laboratory measurements includes electro-optic repeaters and erbium-doped fiber-optic amplifiers. The outdoor fiber links (intended to represent real-world links) include a 75-km fiber run with OC-3 repeaters inserted at the midpoint, and 100-km with wave-division multiplexing equipment in the link. Synchronization error measurement data are presented for each test configuration. Two-way delay data will be presented for the real world links to show the changes in fiber length induced by temperature variations in the outdoor environment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1997
- Accession Number
- ADA500803
Entities
People
- B. R. Hemenway Jr.
- E. A. Swanson
- G. A. Gifford
- J. C. Carney
- Sam R. Stein
- T. P. Celano