Large-caliber light beam coupler

Abstract

The invention discloses a large-caliber light beam coupler, which comprises a conical optical device, a reflecting index matching solution and bare optical fiber with smoothly-cut end surfaces; the conical optical device is an optical device which is centrally symmetrical, wherein the middle part of the optical device is a conical body; an optical spherical lens is machined on the front end of the conical body, and the image focal point of the optical spherical lens is positioned at the tail end of the conical body, and the clear aperture reaches more than 1mm; a light guide pipe is arranged at the tail end of the conical body, the clear aperture of the light guide pipe is matched with the core diameter of the bare optical fiber, and the aperture angle of an outgoing light beam of the light guide pipe is compressed by connecting the light guide pipe with the optical fiber through the reflecting index matching solution in a coupling manner; and a cover layer is respectively arranged on the outer surfaces of the conical body and the light guide pipe and is used for enabling light entering the surface of the conical body to generate total reflection, and the incident light can be bounded inside the conical optical device, and the light is enabled to be transmitted forwards. The large-caliber light beam coupler disclosed by the invention is simple and compact in structure, high in coupling efficiency and capable of directly coupling the light beams with larger calibers to enter the optical fiber.

Description

technical field [0001] The invention relates to a beam coupler, in particular to a large aperture beam coupler. Background technique [0002] In the optical signal coupling process, the coupling efficiency is one of the most important performance indicators. In order to improve coupling efficiency, researchers from all over the world have proposed various coupling methods. For example, in the receiver of the optical fiber rotary connector, the most commonly used receiver is a self-focusing lens. However, when the self-focusing lens is used as a receiver, the parallelism of the incident light is extremely demanding, which makes the coupling efficiency of the optical signal relatively low. . [0003] The dual-channel optical fiber rotary connector with a symmetrical structure mentioned in Chinese patent 00207539 involves a large-aperture beam coupling problem. The outgoing beam rotates around the rotation axis, and the range of the outgoing light increases. When the self-fo...

AI Technical Summary

Problems solved by technology

[0008] In view of the above prior art, in order to solve the coupling problem of the signal between the optical fiber and the large-aperture beam, and overcome the problem of low coupling efficiency of the optical signal

Images