BIDIRECTIONAL WAVE DIVISION MULTIPLEX SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a new approach to isolation factors of counter propagation reflection energy in a bidirectional wave division multiplex system. SOLUTION: This invention provides the bidirectional wave division multiplex system in which crosstalk between interleaved channels of different wavelengths is suppressed by the inclusion in the amplifier gain block of four-port filters that discriminate on the basis of the wavelength of the interleaved signals passing through the four port filters.