Large-mode-area single-mode fiber connector and manufacture method

Abstract

The invention discloses a large-mode-area single-mode fiber connector and a manufacture method. The large-mode-area single-mode fiber connector comprises an insertion pin; a connecting and fixing head is arranged at the periphery of the insertion pin; a single-mode fiber is formed in the center hole of the insertion pin; the single-mode fiber is fused with a graded-refractive-index lens, wherein the graded-refractive-index lens is made by carrying out thermal diffusion on a step-type multimode fiber; and a color ring is formed on a rubber tail sleeve of the single-mode fiber. The manufacture method of the large-mode-area single-mode fiber connector comprises the following steps of: carrying out thermal diffusion on the step-type multimode fiber so as to achieve the element doping of a fiber core, and forming the graded-refractive-index lens with a refractive index reducing outwards along the radial direction; fusing the graded-refractive-index lens with the single-mode fiber, cutting the graded-refractive-index lens and fixedly connecting the graded-refractive-index lens into the center hole of the insertion pin, aligning the outer end of the graded-refractive-index lens with the end face of the insertion, grinding and polishing the end face of the insertion pin; and printing the color ring on the rubber tail sleeve, and configuring the connecting and fixing head for the insertion pin. The large-mode-area single-mode fiber connector and the manufacture method have the advantages that: the large-mode-area single-mode fiber connector is simple in structure and easy to manufacture, the end face of the large-mode-area single-mode fiber connector is easily ensured to be clean, the light-passing area is large, and the matching connection with the traditional other fiber movable connectors can be achieved.

Description

technical field [0001] The invention relates to a large-mode area single-mode optical fiber connector and a manufacturing method thereof, which belong to the field of optical fiber technology and optical fiber communication technology. Background technique [0002] In the actual use of optical fibers, it is often necessary to connect two sections of optical fibers to each other. There are two types of implementation methods: fusion splicing and active connectors. The fusion splicing method to achieve optical fiber docking has the advantages of low insertion loss and high reliability, but once the optical fibers are fused together, it is permanent (unless it is cut off), so its flexibility is very poor. The optical fiber active connector is a component that realizes the detachable connection between the optical fiber and the optical fiber. Through it, the two end faces of the optical fiber can be precisely connected, so that the optical energy output by the transmitting optic...

AI Technical Summary

Problems solved by technology

Although this method realizes the integration of the single-mode fiber and the beam expander lens, it cannot realize the physical contact of the end face of the docked fiber, that is, it cannot eliminate the Fresnel reflection, and it is difficult to control the return loss, so it has not been widely used.

Splicing a section of multimode fiber with graded refractive index at the front end of the single-mode fiber is another way to expand the mode field of the single-mode fiber, but the beam expansion effect is limited due to the existence of the cladding of the multimode fiber

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