Measurement of receiver performance in a free space coherent optical intersatellite link communications experiment

Physics

Scientific paper

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Coherent Light, Data Links, Optical Communication, Optical Measuring Instruments, Satellite Communication, Functional Design Specifications, Laser Beams, Semiconductor Lasers, Signal Mixing

Scientific paper

The theory and practice of free space optical mixing as applied to coherent intersatellite link receivers is addressed. Factors which contribute to mixing losses in free space are discussed, and theoretical predictions made. An experiment to measure the losses in a 1.5-micron DFB coherent system is described, and preliminary results presented. Consideration is given to additional loss and distortion mechanisms which are not modeled, but which come into play for large off-axis angles.

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