▎ 摘　　要

NOVELTY - Bidirectional coupler comprises boron nitride film, and graphene thin film, which are alternately arranged to form a coupling region. USE - The bidirectional coupler is used in field of information optoelectronic technology. ADVANTAGE - The bidirectional coupler can realize light wave coupling in two directions on the same structure. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for using method of bidirectional coupler. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic structural view of a bidirectional coupler (Drawing includes non-English language text).