Weak-confined large-cross-section optical waveguide based dual-polarization mode multiplexing-demultiplexing device

Abstract

The invention discloses a weak-confined large-cross-section optical waveguide based dual-polarization mode multiplexing-demultiplexing device. Two input ends of each polarization beam combiner are both connected with two input optical waveguides, the output end of any one polarization beam combiner is connected with a bus waveguide, the output ends of the residual polarization beams are sequentially connected through a connecting waveguide, a front S-shaped bent optical waveguide, a coupling zone optical waveguide and a rear S-shaped bent optical waveguide. The bus waveguide comprises N sequentially-connected multi-mode optical waveguides, the coupling zone optical waveguide is in coupled connection with the multi-mode optical waveguides, and the multi-mode optical waveguide located at the tail end is connected with an output multi-mode optical waveguide. Optical signals are input through an input optical waveguide or the output multi-mode optical waveguide. The weak-confined large-cross-section optical waveguide based dual-polarization mode multiplexing-demultiplexing device is compact in structure, achieves mode multiplexing and can be used for large-capacity data transmission. By the adoption of a polarization multiplexing technology, the capacity is further expanded, and the weak-confined large-cross-section optical waveguide based dual-polarization mode multiplexing-demultiplexing device is suitable for a mode multiplexing system, facilitates coupling of few-mode optical fibers and has the prominent advantages of being convenient to design, compact in structure, convenient to expand and the like.

Description

technical field [0001] The invention relates to a multiplexer-demultiplexer, in particular to a dual-polarization mode multiplexer-demultiplexer based on a weak confinement large-section optical waveguide for a mode multiplex system. Background technique [0002] As we all know, long-distance optical communication has achieved great success. Similarly, optical interconnection, as a new interconnection method, can overcome the bottleneck problem of traditional electrical interconnection, and has attracted widespread attention. Since J.W.Goodman proposed to adopt the optical interconnection scheme in VLSI in 1984, the research of optical interconnection has made great progress. At present, optical interconnection is continuously advancing towards ultra-short distance interconnection, and its communication capacity demand is increasing day by day. Aiming at the large amount of data transmission in the optical interconnection system, the most direct method is to borrow the wav...

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Problems solved by technology

This design requires the asymmetric coupler to have significant polarization sensitivity, which is usually achieved by using an ultra-high refractive index difference optical waveguide, so it is more suitable for on-chip optical interco

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