Novel structure of free space optical fiber coupling system

Abstract

The invention provides a novel structure of a free space optical fiber coupling system. The novel structure comprises a bottom plate, an optical fiber clamping and fixing structure, a displacement micrometer, a first reflecting mirror, a second reflecting mirror and a coupling lens, wherein the first reflecting mirror, the second reflecting mirror and the coupling lens are arranged on the bottom plate; a light beam (line) enters the second reflecting mirror through the first reflecting mirror and then enters the end face of an optical fiber through the coupling lens for optical coupling; the displacement micrometer adjusts the optical fiber clamping and fixing structure, so that a relative position of the optical fiber clamping and fixing structure and the coupling lens is adjusted; and the first reflecting mirror and the second reflecting mirror are provided with adjusting screws for adjusting pitching and inclination angles of the first reflecting mirror and the adjusting screw rod.The structure disclosed by the invention has the advantages that 1, the structure is simple and compact; 2, the principle is clear; 3, long-time steady operation can be realized; and 4, the result reproducibility is stronger.

Description

Technical field [0001] The invention relates to the field of optical fibers, in particular to an optical fiber coupling system. Background technique [0002] Figure 1 to Figure 3 The middle is a traditional three-axis adjustment system. The three-axis adjustment part is separated from the coupling lens 001. The light passes through the coupling lens and is concentrated on the fiber end face behind the coupling lens 001. Through the xyz three axes, they correspond to the horizontal direction, the vertical to the horizontal direction and The direction perpendicular to the plane formed by xy, where the offset in the xy plane is collectively called the lateral offset. The separation structure between the coupling lens at the front end and the displacement module at the rear can be adjusted as needed. The front end here refers to figure 1 In the left. However, since the movement of the earth has a greater influence on the lateral offset in the xy plane, the lateral offset is more se...

AI Technical Summary

Problems solved by technology

[0007] The actual experimental results show that the traditional three-axis adjustment structure is easily deviated by the vibration generated by the earth's movement, which in turn leads to a decrease in the optical coupling efficiency

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