Abstract

An optical communication system employing polarization modulation–demodulation is described. The system offers significant improvements in usable transmitted power or extended range, lessened susceptibility to interference from linearly polarized background light, and ease of transmitter/receiver alignment over the performance of a comparable intensity-modulated optical communication system.

© 1964 Optical Society of America

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Figures (3)

Fig. 1
Fig. 1

Polarization modulation–demodulation transmission system.

Fig. 2
Fig. 2

Polarization modulation system receiver.

Fig. 3
Fig. 3

Detection process used in polarization–modulated light communication system.

Equations (5)

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R = N 2 / ( N + N b + N b 2 ) .
R = N 2 / ( N + 2 N b ) .
Signal = N 2 ; Noise = N + N b .
Signal = N 2 ; Noise = N + N b .
R = ( 2 N 2 ) / ( 2 N + 2 N b ) .

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