Mode Division Multiplexer

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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 (Please also see side-polished fiber and mode selective coupler). The device demonstrates high coupling efficiency and mode extinction ratio over a wide wavelength range. Furthermore, this configuration provides a unique flexibility of starting with a 3-Mode MDDM and adding 3 more modes at a later time when needed. The MDDM is useful for mode division multiplexed communication systems or sensor systems.

Features

  • All-fiber optic construction
  • Low loss mode muxing/demuxing
  • Communication band optimization
  • Available with or without connectors
  • Scalable to the 6-Mode Multiplexer (3-Mode Multiplexer)
  • Number of modes can be customized (LP01 / LP11 a, b / LP21 a, b / LP02 / LP11 a, b / LP21 a, b, etc.)

Applications

  • Mode division multiplexing for optical communications
  • Excitation of higher-order modes
  • Mode-group multiplexing

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