Optical isolator

Abstract

The invention provides an optical isolator comprising a front cover, a rear cover, a front sleeve, a front ferrule, a magnetic ring, a CORE assembly, a lens assembly, a rear sleeve and a rear ferrule.On the basis of the structure, the CORE assembly and the lens assembly carry out one-way transmission on an optical signal, so that no collimator or a plurality of lenses need to be set in the optical isolator and thus the product size and production cost are reduced. Since a polarization-independent displacement type assembly or a polarization-dependent absorption type assembly is arranged inside the CORE assembly, the optical isolator is set to be a polarization-independent or polarization-dependent optical isolator, so that the application range of the optical isolator is extended. Moreover, a glass rod is used for replacing the rear sleeve and the rear ferrule, so that the internal space can be saved further and thus the product size is reduced further.

Description

technical field [0001] The invention relates to optical communication, in particular to an optical isolator. Background technique [0002] An optical isolator is a device that allows light to enter from the input end and reach the receiving end with a small loss after passing through the optical isolator; at the same time, if the light is input from the receiving end in reverse, it should generate a large loss to reach the output end, thus completing For the function of one-way isolation, common optical isolators achieve the optical isolation effect by setting the optical rotation effect of the Faraday rotator under the action of a magnetic field, and at the same time combining the anisotropy of the birefringent crystal. Generally, in addition to the optical parameter requirements for this kind of isolator, the product is also required to have small size, high reliability and certain economy, etc. However, some optical isolators such as figure 1 As shown, it is generally ne...

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Problems solved by technology

Generally, in addition to the optical parameter requirements for this kind of isolator, the product is also required to have small size, high reliability and certain economy, etc. However, some optical isolators such as figure 1 As shown, it is generally necessary to set a collimator or multiple lenses, resulting in a relatively large product volume and a large installation space; resulting in a corresponding increase in the consumed crystal material and the volume of the Faraday rotator, thereby increasing the raw material cost of the product

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