DMUX device

Abstract

The invention relates to the technical field of optical communication, and provides a DMUX device which comprises a light splitting assembly, a first polarization initial detection assembly, a second polarization initial detection assembly and a single magnet, and optical rotation media are arranged on the two sides of the magnet in the direction perpendicular to the magnetic flux direction of the magnet in the mode that the light passing faces are perpendicular to the magnetic flux direction. The first polarization initial detection assembly, the optical rotation medium and the second polarization initial detection assembly are sequentially arranged on the light path of each beam of emergent light; the first polarization detection assembly and the second polarization assembly are used for selectively allowing light to pass through or preventing light from passing through according to the polarization direction of the light; the magnet is used for providing an external magnetic field for the optical rotation medium, so that light passing through the optical rotation medium generates a magnetic optical rotation effect, the polarization direction of the light is changed, emergent light can be emitted out, and light opposite to the emergent light in direction cannot pass through. According to the invention, difficulty in device installation or influence on the service life of the device or device damage caused by a plurality of magnets is avoided.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a DMUX device. Background technique [0002] In optical communication, DMUX, as the most basic component, is widely used in optical signal demultiplexing in optical communication system. However, the demultiplexing band of the usual DMUX is fixed and single, and the more demultiplexing numbers, the larger the volume and the higher the cost. [0003] In order to prevent the outgoing light after splitting in the DMUX from being reflected back or affecting the splitting process due to the incidence of other light, optical components such as optical isolators are usually installed. An optical isolator is a passive optical device that only allows one-way light to pass through. A commonly used optical isolator consists of a magnetic ring and a Faraday gyromagnetic component packed inside the magnetic ring. Usually, an optical isolator is used for a beam of light....

AI Technical Summary

Problems solved by technology

An optical isolator is a passive optical device that only allows one-way light to pass through. A commonly used optical isolator consists of a magnetic ring and a Faraday magnetic component filled inside the magnetic ring. Usually, an optical isolator is used for a beam of light. Isolation, but in the splitter, it is necessary to achieve the optical isolation effect for the separated multiple beams of light. The method used in the prior art is the juxtaposition of optical isolators, but due to the mutual repulsion between the magnetic rings It is difficult to install and fix it, which makes the factory DMUX devices have a certain failure rate

And because its repulsive force exists for a long time, it will inevitably produce a continuous reaction force on the device used to fix the magnetic ring, thereby affecting the service life of the DMUX device, and even causing damage to the DMUX device

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