Optimum length of multimode optical branching waveguide for reducing its mode dependence | Zendy

Yasuo Kokubun | Zendy; T. Fuse | Zendy; Kenichi Iga | Zendy

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Optimum length of multimode optical branching waveguide for reducing its mode dependence

Author(s) -

Yasuo Kokubun,

T. Fuse,

Kenichi Iga

Publication year - 1985

Publication title -

applied optics

Language(s) - English

Resource type - Journals

ISSN - 0003-6935

DOI - 10.1364/ao.24.004408

Subject(s) - multi mode optical fiber , optics , branching (polymer chemistry) , mode scrambler , waveguide , materials science , insertion loss , branching fraction , physics , optical fiber , atomic physics , plastic optical fiber , composite material

In this paper, we theoretically analyze the loss and branching ratio of multimode optical branching waveguides by using a ray tracing method to obtain less mode-dependent branching characteristics. First, a 2×2 optical mixing and branching waveguide with a step-index profile are considered. It is found that an optimum length to achieve a low loss and stable branching ratio exists. Second, a waveguide with mode scrambler is investigated. By sacrificing some amount of insertion loss, the mode dependence can be minimized

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