Transfer function of long spliced graded-index fibers with mode scramblers.

Transfer functions of long spliced graded-index fibers are described. The transfer function of a spliced graded-index fiber is determined with the steady state mode exciter and the mode scramblers loaded just after each splicing. Under these conditions, the total transfer function calculated by the linear combination of each fiber's transfer function is in good agreement with the measurement results. It has been found that the transmission bandwidth can be widened by using mode scramblers.