6 August 1993 Laser communications for covert links
Author Affiliations +
Proceedings Volume 1866, Free-Space Laser Communication Technologies V; (1993) https://doi.org/10.1117/12.149230
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
An atmospheric lasercom link over a 4 km path has been implemented between The MITRE Corporation and Lahey Clinic, Bedford, MA. This testbed employs emerging 1550 nm laser and receiver technology for greatly enhanced covertness and eye safety compared to current 820 nm technology. Supporting testbed equipment provides automated monitoring of link performance, correlated with automated data acquisition of the local visibility and precipitation. This report describes the laser link and supporting testbed equipment under IBM PS/2 computer control in which continuous monitoring of the atmospheric conditions, link bit error rate, pointing jitter, and beam wander are accomplished. The bit error rate drives an automated adaptive data rate modem at one of three data rates, depending on weather conditions. Criteria for operation at 1550 nm, such as trade-offs with regard to atmospheric absorption, covertness and eye safety are presented. Characteristics of our custom designed laser transmitter (laser diode, beam parameters, modulation, etc.), and receiver (optics, detector electronics, bit synchronizer) are described. System alignment procedures and transmission performance as a function of temperature, visibility, and precipitation are presented.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jerold L. Jaeger, Robert T. Carlson, "Laser communications for covert links", Proc. SPIE 1866, Free-Space Laser Communication Technologies V, (6 August 1993); doi: 10.1117/12.149230; https://doi.org/10.1117/12.149230
PROCEEDINGS
12 PAGES


SHARE
RELATED CONTENT

Scalable lidar technique for fire detection
Proceedings of SPIE (August 22 2014)
Eye-safe laser radar for the detection of fog banks
Proceedings of SPIE (September 15 1995)
A novel 3D staring system for driver assistance
Proceedings of SPIE (November 19 2003)
Gallium arsenide eyesafe laser rangefinder
Proceedings of SPIE (July 01 1990)
Open fiber control: a laser safety interlock technique
Proceedings of SPIE (March 01 1992)

Back to Top