Selective mode launching in a multimode channel waveguide by planar coupler

Selective mode couplers representing a planar variant of input/output prism couplers have been fabricated. The planar couplers developed demonstrate selective excitation of solitary modes of different orders in channel waveguides. Mode division/multiplexing units based on these couplers can provide practical applications of modal data compression in multimode fibre links, resulting in multiplication of the transmission capacity.