Optical fiber connector assembly and manufacturing method thereof

Abstract

A method for manufacturing a fiber optic connector assembly, comprising: providing a ferrule having a first fiber and a cable having a second fiber; adjusting the ferrule to locate the first fiber at a first predetermined orientation, and adjusting the cable to locate the second fiber at a second predetermined orientation; and inserting the first fiber located at the first predetermined orientation and the second fiber located at the second predetermined orientation into a alignment tool received in a housing of a fiber optic connector. Wherein the first and second predetermined orientations are set so that a distance between a center of a fiber core of the first fiber and a center of a fiber core of the second fiber is equal to an absolute value of a difference between a distance from a center of a coat layer to the center of the fiber core of the first fiber and a distance from a center of a coat layer to the center of the fiber core of the second fiber when the first fiber located at the first predetermined orientation and the second fiber located at the second predetermined orientation are inserted into the alignment tool.

Description

technical field [0001] The invention relates to a method for manufacturing an optical fiber connector assembly and an optical fiber connector assembly manufactured by the method. Background technique [0002] The insertion loss of a fiber optic connector is mainly determined by the quality of the connector surface finish and the bias of the fiber core. The present invention is primarily concerned with reducing the bias in the fiber core. The offset of the fiber core of the intermateable connector is mainly determined by the following three factors: (1) The eccentricity e1' of the inner hole of the connector ferrule and the outer circle of the connector ferrule (see Figure 1A ); (2) the eccentricity e2' of the fiber core and the fiber cladding layer (see Figure 1B ); (3) The difference between the diameter of the optical fiber and the diameter of the inner hole of the connector ferrule △d (see Figure 1C ). Among them, the influence corresponding to the eccentricity e2' ...

AI Technical Summary

Problems solved by technology

(1) Using high-precision connector ferrule, please refer to Figure 1A , Figure 1B and Figure 1C , by reducing the eccentricity (e1') of the inner hole of the connector ferrule and the outer circle of the connector ferrule and the difference (△d) between the diameter of the fiber and the diameter of the inner hole of the connector ferrule to reduce the fiber core relative to the connection The offset of the outer circle of the connector ferrule, but it will bring a sharp increase in the cost of the connector ferrule and it is very difficult for the optical fiber to penetrate into the inner hole of the connector ferrule during the manufacturing process

(2) Using core adjustment, please refer to figure 2 , that is, by adjusting the offset of the connector core to a specific angular range corresponding to the connector key 03 ( figure 2 In the black fan-shaped area in the middle), so as to reduce the offset of the fiber core when the connectors are mated, but it is only suitable for the mating of the connectors that have undergone core adjustment. If the connector ferrule with ordinary precision is used, the manufacturing process is equivalent to Screening, such as using a sub-high-precision connector ferrule, there will also be an increase in the cost of the connector ferrule and an increase in the difficulty of inserting the optical fiber into the inner hole of the connector ferrule during the manufacturing process

[0006] In the prior art, generally, the optical fiber to be ferruled and the optical fiber of the cable are directly inserted into the alignment tool inside the connector housing, however, the distance between the center of the core of the optical fiber of the ferrule and the center of the fiber core of the optical fiber of the cable The deviation distance between them is random and uncontrollable. The maximum deviation distance is the sum of the eccentricity of the fiber core of the ferrule and the eccentricity of the fiber core of the fiber optic cable. Therefore, the optical fiber connector manufactured by this method The performance of the fiber optic connector is unstable, and it cannot be guaranteed that each fiber optic connector produced can meet the set requirements, unless high-precision optical cables and high-precision ferrules are used, which will lead to an increase in costs

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