title: Mode multi/demultiplexing with parallel waveguide for mode division multiplexed transmission.
abstract: We propose a planar lightwave circuit (PLC)-based mode multi/demultiplexer (MUX/DEMUX) with an asymmetric parallel waveguide for mode division multiplexed (MDM) transmission. The PLCb-ased mode MUX/DEMUX has advantage of selectively exciting higher-order mode. We realize three-mode (LP(01), LP(11)a, and LP(21)a) multiplexing by using an asymmetric parallel waveguide. We then design and fabricate a PLC-based mode MUX/DEMUX on one chip by using our proposed LP(11) mode rotator to allow us to utilize the LP(11)b mode. We successfully multiplex the LP(01), LP(11)a, and LP(11)b modes and achieve a relatively low insertion loss over the C-band using our fabricated mode MUX/DEMUX. Our results indicate that the PLC-based mode MUX/DEMUX with a uniform height has the potential to increase the mode number by using an LP(11)b mode.
authors.forename: Nobutomo
authors.initials: N
authors.lastname: Hanzawa
authors.forename: Kuimasa
authors.initials: K
authors.lastname: Saitoh
authors.forename: Taiji
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Matsui
authors.forename: Kyozo
authors.initials: K
authors.lastname: Tsujikawa
authors.forename: Masanori
authors.initials: M
authors.lastname: Koshiba
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Yamamoto
mesh_terms: D055620:Optical Phenomena; D055095:Optics and Photonics / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted