The invention relates to a method and an apparatus for manufacturing an
optical coupling arrangement, and a specific coupling arrangement. A
substrate waveguide (306) and at least one coupling element (304, 306) in
the coupling arrangement are made of polymer material in the same
replication process at the same time. At least one diffractive coupling
element (304, 306) is then formed in the polymer material by placing the
polymer material against a replication mould, which comprises a surface
profile model of at least one diffractive coupling element (304, 306)
that is patterned into the replication mould by means of micro
lithography.