Abstract

Described is a new type of optical fiber parallel data transmission system utilizing the multifrequency parallel signals. The multifrequency parallel signals are used to modulate the squarewave carrier by squarewave frequency modulation (SWFM) scheme, and transmitted through a single optical fiber. The system can send 8-bit parallel data at a low speed of 5 kbps, but for the longer distance of 2 km, by a multi-mode GI optical fiber. In addition, because of the excellent stability against EMI, the proposed system can be used in inferior environments to transmit the signals of sensors and the manual control signals between sensors and monitors in both directions for industrial use. >

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