Optical coupling system and optical coupling method

Abstract

An optical coupling system is provided for coupling a light beam onto an end face of an optical waveguide in an optical communication module group. The optical coupling system comprises a curved optical surface positioned along an optical pathway of the optical coupling system and a plurality of perturbations disposed on an outer side of the curved optical surface. A light beam generated by a light source and propagating along an optical pathway of the optical coupling system in a first direction is incident on the curved optical surface having the perturbations formed therein. Each perturbation has a localized refractive effect on a portion of the light beam that is incident on the curved optical surface to form a respective light beam portion at a predetermined plane. The perturbations are shaped, sized and positioned such that a predetermined aggregated refractive effect of partially or fully overlapping all of the respective light beam portions at the predetermined plane forms a complex light beam shape at the predetermined plane that is different in shape from respective shapes of each of the respective light beam portions. The complex light beam shape is preselected to matcha spatial and an angular distribution of a plurality of light modes of the optical waveguide.

Description

【Technical field】 [0001] The present invention relates to an optical communication module, in particular to an optical coupling system for an optical communication module, the optical coupling system can reduce the back reflection of the beam emitted to the end face of the optical waveguide, and at the same time improve the beam mode and mode matching between the optical waveguide modes. 【Background technique】 [0002] In an optical communication network, optical communication modules, such as optical transceivers, transmitter and receiver modules, are used to transmit and receive optical signals between optical waveguides, usually optical fibers. The optical transceiver module includes a transmitting end and a receiving end. At the transmitting end, the laser light source emits laser beams, and the optical coupling system receives these laser beams and optically couples these laser beams to the end face of the optical fiber cable. The laser light source typically includes...

AI Technical Summary

Problems solved by technology

Use of angled fiber pigtails or fiber ferrules adds complexity and cost to the transceiver package

At the same time, these methods are not suitable for applications that require the use of standard optical fibers

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