Simultaneous single fiber transmission of video and bidirectional voice/data using LiNbO sub 3 guided wave devices.

A loop distribution system experiment which uses integrated optics to effect bidirectional transmission on a single mode fiber is described. The system has practical applications and provides more functionality than previously reported experimental systems. The system consists of a video link (180 Mb/s and a voice/data link (1.54 Mb/s) to the end user and a return voice/data link (1.54 Mb/s) from the end user. Two LiNbO sub 3 devices are used to externally modulate lasers and a third is used in a novel way to demultiplex the incoming signals and to eliminate the need for an optical source at the user's end. The system operated over 4km of standard (5D) single mode fiber with a BER = 10 sup -9 and excess margins (4.9 dB, 9.3 dB, 28.1 dB) on the three links.