Transmission Tests During The SL Lightwave Submarine Cable System Sea Trial

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Abstract
Experimental aspects of the deep water (3000 fathoms = 5486 m) sea trial conducted in September, 1982 in the North Atlantic are described. We deployed the major portion of the 18.2 km cable with its 12 single mode fibers twice within a 60 hour period. We constructed a transmission test system that allowed us to make all measurements from the ship end of the cable. Observed changes in fiber loss and bit error rates from the effects on the fiber of immersion, tension, temperature, and pressure were very small and will be discussed along with other interesting aspects of the experiment. The test sets included programmable single mode optical attenuators which permitted automatic measurement of system margins at will during any phase of the experiment. Single mode connectors permitted us to recon-figure the fiber topology as needed. For a description of the SL system the reader is referred to reference 1.

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