Design of small mode-dependent-loss scrambling-type mode (de)multiplexer based on PLC | Zendy

Motoki Shirata | Zendy; Takeshi Fujisawa | Zendy; Taiji Sakamoto | Zendy; Takashi Matsui | Zendy; Kazuhide Nakajima | Zendy; Kunimasa Saitoh | Zendy

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Design of small mode-dependent-loss scrambling-type mode (de)multiplexer based on PLC

Author(s) -

Motoki Shirata,

Takeshi Fujisawa,

Taiji Sakamoto,

Takashi Matsui,

Kazuhide Nakajima,

Kunimasa Saitoh

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.387890

Subject(s) - multiplexer , mode scrambler , mode (computer interface) , physics , scrambling , optics , multiplexing , planar , equilibrium mode distribution , leaky mode , insertion loss , computer science , radiation mode , single mode optical fiber , algorithm , telecommunications , optical fiber , computer graphics (images) , operating system

A general design rule of scrambling-type mode (de)multiplexers (mode scramblers) based on silica planar lightwave circuit (PLC) with small mode-dependent-loss (MDL) is presented for a mode-division multiplexing (MDM) system. First, we consider four- and eight-mode scramblers and demonstrate that if the number of modes is 2 N , it is possible to construct small-MDL mode scramblers by using Y-branch waveguides and mode rotators. Next, a 6-mode scrambler, which can be used for four linearly polarized (LP) mode transmission in MDM system, is considered, and the MDL is large if Y-branch waveguides are cascaded simply, originating from the radiation loss of unwanted modes at the Y-branch. We propose a 2 + 4-type mode scrambler by combining 2- and 4-mode scramblers and demonstrate that it is possible to design a small MDL 6-mode scrambler.

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