Mode division demultiplexer/multiplexer (MDDM) converts LP01 mode in single mode fibers (SMF) into desired higher order modes in a few mode fiber (FMF), and vice versa. Side-polished SMF and FMF half-couplers are mated for an efficient evanescent mode coupling between two optical fibers. The device demonstrates high coupling efficiency and mode extinction ratio over a wide wavelength range. The MDDM is useful for mode division multiplexed communication systems or sensor systems.
• All-fiber optic construction • Low loss mode muxing/demuxing • Communication band optimization • Available with or without connectors • Number of modes can be customized (LP01 / LP11 a, b / LP21 a, b / LP02, etc.)
• Mode division multiplexing for optical communications • Excitation of higher order modes