High return loss optical attenuator and manufacturing method thereof

Abstract

The invention relates to a high return-loss optical attenuator, as well as a preparation method thereof. Firstly, a ceramic fiber core is fixed in a fiber core seat, and another ceramic fiber core is fixed in a metal fiber core, wherein, optical fibers are arranged in the two ceramic fiber cores; the two opposite optical fiber end faces in the ceramic fiber cores are inclined surfaces both havingangles larger than 6.94 DEG with the elevation direction; and then, the fiber core seat is hermetically connected with the metal fiber core, therefore, the high return-loss optical attenuator is prepared. The invention has the advantages that the structure is simple; the manufacture is convenient; the high return loss can be realized only by manufacturing the two opposite optical fiber end faces into the inclined surfaces having the angles larger than 6.94 DEG; the required attenuation values are realized by adjusting the distance between the two optical fiber end faces; the optical attenuator with different attenuation values can be conveniently and fast manufactured according to demands; and the demands of the different attenuation values are satisfied.

Description

technical field [0001] The invention relates to an optical attenuator and a manufacturing method thereof, in particular to a high return loss optical attenuator capable of realizing arbitrary attenuation values ​​with high precision and a manufacturing method thereof, belonging to the field of optical communication. Background technique [0002] At present, the optical attenuator mainly realizes optical attenuation through the attenuating fiber with special doping substances, which has the following disadvantages: 1. The attenuating fiber is expensive; 2. The accuracy is determined by the length of the fiber, which cannot be adjusted, and there is a large error; 3. Every An optical attenuator has a fixed optical attenuation value, which corresponds to an optical attenuation fiber, so the attenuation value is limited. Contents of the invention [0003] The purpose of the present invention is to provide a high return loss optical attenuator and its manufacturing method. By m...

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Problems solved by technology

[0002] At present, the optical attenuator mainly realizes optical attenuation through the attenuating fiber with special doping substances, which has the following disadvantages: 1. The attenuating fiber is expensive; 2. The accuracy is determined by the length of the fiber, which cannot be adjusted, and there is a large error; 3. Every An optical attenuator has a fixed optical attenuation value, corresponding to a kind of optical attenuation fiber, so the attenuation value is limited

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