Download or read book Atmospheric Propagation of Injection Laser Radiation for High Data Rate Transmission written by Ernst J. Schiel and published by . This book was released on 1968 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emphasis in this program was the development of a high data rate system for use in transmission through the atmosphere. This system was designed to have a large signal-to-noise ratio for distances up to 20 km and can, therefore, tolerate large insertion losses due to unfavorable weather conditions. This system has a maximum capacity of 10 megabits/sec and either PFM, PPM, or PCM can be used. With presently available military PCM equipment, simultaneous transmission of 196 audio channels is feasible. Specifically presented in this paper are: the design and construction of the transmitter and receiver, signal-to-noise considerations, and operational characteristics of the system. An experimental injection laser communication link was set up over a 13 km range. The transmitter was located at Fort Monmouth, N.J. The path of the laser beam traversed various terrain including a wide river, parking lots, woods and suburban areas. The average height of the laser beam above the ground was approximately 25 meters and its path across the water was approximately 1 km. (Author).